2,900 community and non-transient non-community water systems are listed for Pennsylvania in EPA SDWIS. 390 were sampled under UCMR 5; 176 of those had at least one PFAS result at or above the reporting level, and 120 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
Pennsylvania map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (390)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Akron Borough | PA7360128 | Akron | 4,200 | 5 | 4.4 | 0.002 | PFOA 1–3 × its limit |
| Albion Borough | PA6250007 | Albion | 5,842 | <MRL | <MRL | 0 | No PFAS detected |
| Altoona Water Authority | PA4070023 | Altoona | 62,500 | <MRL | <MRL | 0 | No PFAS detected |
| Ambler Boro Water Dept | PA1460020 | Ambler | 20,000 | 15.3 | 13.7 | 1.793 | PFOA ≥ 3 × its limit |
| Ambridge Water Auth | PA5040008 | Ambridge | 19,500 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Bensalem | PA1090078 | Bryn Mawr | 59,001 | 8 | 7.5 | 0.522 | PFOA 1–3 × its limit |
| Aqua Pa Bristol | PA1090001 | Bryn Mawr | 28,727 | 4.5 | <MRL | 0 | PFOA 1–3 × its limit |
| Aqua Pa Chalfont | PA1090005 | Bryn Mawr | 5,900 | 8.8 | 19 | 0.313 | PFOS ≥ 3 × its limit |
| Aqua Pa Fawn Lake Forest | PA2520037 | Honesdale | 6,533 | <MRL | <MRL | 0 | Other PFAS detected |
| Aqua Pa Flying Hills Wa Sys | PA3060018 | Bryn Mawr | 5,100 | 6.3 | 6.4 | 0.002 | PFOS 1–3 × its limit |
| Aqua Pa Friendship | PA1150137 | Bryn Mawr | 8,800 | 7.7 | 9.5 | 0.304 | PFOS 1–3 × its limit |
| Aqua Pa Greenville | PA6430037 | Sharon | 8,600 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Hatboro | PA1460028 | Bryn Mawr | 12,901 | 16.2 | 21.5 | 0.625 | PFOS ≥ 3 × its limit |
| Aqua Pa Inc Treasure Lake Div | PA6170048 | Sharon | 4,155 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Jenks Twp Wtp | PA6270008 | Sharon | 4,320 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Lake Latonka Wtp | PA6430059 | Sharon | 1,600 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Main System | PA1460073 | Bryn Mawr | 822,600 | 12.6 | 9.2 | 1.203 | PFOA ≥ 3 × its limit |
| Aqua Pa Perkiomen Township | PA1460069 | Bryn Mawr | 3,600 | 10.8 | 7.4 | 0.007 | PFOA 1–3 × its limit |
| Aqua Pa Roaring Creek Division | PA4490024 | Shamokin | 43,000 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Shenango Valley Wtp | PA6430054 | Sharon | 48,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Aqua Pa Spring Run | PA1150089 | Bryn Mawr | 8,151 | 6.8 | 4.4 | 0.52 | PFOA 1–3 × its limit |
| Aqua Pa Superior Main System | PA1460085 | Bryn Mawr | 11,400 | 11.8 | 5.8 | 0.003 | PFOA 1–3 × its limit |
| Aqua Pa Susquehanna Division | PA2080028 | Sayre | 15,569 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa Uwchlan | PA1150035 | Bryn Mawr | 35,518 | 9.3 | 7.1 | 0.003 | PFOA 1–3 × its limit |
| Aqua Pa Water Co Honesdale | PA2640018 | White Haven | 5,500 | <MRL | <MRL | 0 | No PFAS detected |
| Aqua Pa West Chester | PA1150098 | Bryn Mawr | 48,600 | 5.9 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Aqua Shenandoah | PA3540044 | Shamokin | 9,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Ashland Area Water Authority | PA3540030 | Ashland | 4,200 | <MRL | 20.1 | 0.95 | PFOS ≥ 3 × its limit |
| Auth Of Boro Of Charleroi | PA5630039 | Charleroi | 27,000 | <MRL | <MRL | 0 | No PFAS detected |
| Baden Boro Water Dept | PA5040080 | Baden | 3,948 | <MRL | <MRL | 0 | No PFAS detected |
| Bangor Area School Complex | PA3480816 | Bangor | 2,700 | <MRL | <MRL | 0 | Other PFAS detected |
| Bcwsa Main Lower South | PA1090079 | Warrington | 52,621 | 7.3 | 6.9 | 0.483 | PFOA 1–3 × its limit |
| Bear Valley Joint Auth | PA7280043 | St Thomas | 12,589 | <MRL | <MRL | 0 | Other PFAS detected |
| Beaver Boro Muni Auth | PA5040009 | Beaver | 5,799 | 7 | 4.9 | 2.828 | Hazard Index 1–3 × its limit |
| Beaver Falls Muni Auth | PA5040012 | Beaver Falls | 49,500 | 5.4 | 4 | 0.018 | PFOA 1–3 × its limit |
| Belle Vernon Boro Muni Auth | PA5260004 | Belle Vernon | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bellefonte Borough Water Auth | PA4140075 | Bellefonte | 9,500 | <MRL | <MRL | 0 | No PFAS detected |
| Birdsboro Muni Water Auth | PA3060010 | Birdsboro | 5,353 | <MRL | <MRL | 0 | No PFAS detected |
| Blairsville Muni Auth | PA5320006 | Blairsville | 4,023 | <MRL | <MRL | 0 | No PFAS detected |
| Blythe Twp Municipal Authority | PA3540017 | New Philadelphia | 7,100 | <MRL | <MRL | 0 | No PFAS detected |
| Boro Of Waynesboro | PA7280032 | Waynesboro | 13,200 | <MRL | <MRL | 0 | No PFAS detected |
| Boyertown Muni Auth | PA3060081 | Boyertown | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Brackenridge Boro Water Dept | PA5020006 | Brackenridge | 3,700 | <MRL | <MRL | 0 | No PFAS detected |
| Bradford City Water Authority | PA6420014 | Bradford | 18,500 | <MRL | <MRL | 0 | No PFAS detected |
| Brighton Twp Muni Auth | PA5040017 | Beaver | 7,920 | <MRL | <MRL | 1.198 | Hazard Index 1–3 × its limit |
| Brockway Boro Municipal Auth | PA6330002 | Brockway | 4,384 | <MRL | <MRL | 0 | No PFAS detected |
| Brodhead Creek Reg Water Auth | PA2450034 | East Stroudsburg | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Brookville Municipal Auth | PA6330004 | Brookville | 6,220 | <MRL | <MRL | 0 | Other PFAS detected |
| Buck Hill Falls Water Co | PA2450020 | Buck Hill Falls | 876 | <MRL | <MRL | 0 | No PFAS detected |
| Buckingham Twp Cold Spring | PA1090137 | Buckingham | 4,760 | 22 | 19.3 | 0.007 | PFOA ≥ 3 × its limit |
| Bucks County Community College | PA1090962 | Newtown | 8,000 | 7.1 | <MRL | 0 | PFOA 1–3 × its limit |
| Buffalo Twp Mun Auth Freeport | PA5030019 | Sarver | 5,849 | <MRL | <MRL | 0 | No PFAS detected |
| Caernarvon Twp Auth | PA3060052 | Morgantown | 4,245 | 55.8 | <MRL | 0.015 | PFOA ≥ 3 × its limit |
| Capital Region Water | PA7220049 | Harrisburg | 66,540 | <MRL | <MRL | 0 | No PFAS detected |
| Carbon Plaza Mall | PA3130308 | Branchburg | 650 | <MRL | <MRL | 0 | No PFAS detected |
| Carlisle Water Trmt Plt | PA7210002 | Carlisle | 26,000 | 5 | 11.3 | 0.004 | PFOS 1–3 × its limit |
| Catasauqua Mun Water Works | PA3390044 | Catasauqua | 6,598 | <MRL | <MRL | 0.421 | Hazard Index below its limit |
| Center Twp Water Auth | PA5040007 | Aliquippa | 19,000 | <MRL | <MRL | 0 | No PFAS detected |
| Central Indiana Co Water Auth | PA5320040 | Homer City | 4,920 | <MRL | <MRL | 0 | No PFAS detected |
| Centre Hall Boro Water Dept | PA4140077 | Centre Hall | 1,900 | <MRL | <MRL | 0 | No PFAS detected |
| Chambersburg Boro Water Sys | PA7280005 | Chambersburg | 31,048 | <MRL | <MRL | 0 | No PFAS detected |
| Chester Water Authority | PA1230004 | Chester | 140,437 | 5.1 | <MRL | 0.002 | PFOA 1–3 × its limit |
| City Of Bethlehem | PA3480046 | Bethlehem | 117,259 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Dubois Water Depart | PA6170016 | Dubois | 7,794 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Lancaster | PA7360058 | Lancaster | 120,000 | 23.8 | <MRL | 0.005 | PFOA ≥ 3 × its limit |
| City Of Lock Haven Water Dept | PA4180048 | Lock Haven | 8,450 | <MRL | <MRL | 0 | No PFAS detected |
| Clearfield Municipal Auth | PA6170008 | Clearfield | 14,000 | <MRL | <MRL | 0 | Other PFAS detected |
| College Twp Water Authority | PA4140082 | State College | 6,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Collegeville Trappe Joint Pwd | PA1460022 | Trappe | 8,470 | 235 | 15 | 0.422 | PFOA ≥ 3 × its limit |
| Columbia Water Co | PA7360123 | Columbia | 25,200 | <MRL | <MRL | 0 | No PFAS detected |
| Conemaugh Twp Muni Auth | PA4560048 | Davidsville | 7,800 | <MRL | <MRL | 0 | Other PFAS detected |
| Conneaut Lake Borough Wtp | PA6200015 | Conneaut Lake | 870 | <MRL | <MRL | 0 | No PFAS detected |
| Cooper Twp Municipal Auth | PA6170041 | Morrisdale | 3,700 | <MRL | <MRL | 0 | No PFAS detected |
| Coraopolis Water & Sewer Auth | PA5020010 | Coraopolis | 5,804 | 5.2 | 18.8 | 1.267 | PFOS ≥ 3 × its limit |
| Coterra Energy | PA2580558 | Montrose | 50 | <MRL | <MRL | 0 | No PFAS detected |
| Coudersport Boro Authority | PA6530009 | Coudersport | 3,166 | <MRL | <MRL | 0 | No PFAS detected |
| Cranberry Twp Wtp | PA5100094 | Cranberry Twp | 42,000 | <MRL | <MRL | 0 | No PFAS detected |
| Creative Kids East Child Dev | PA3391032 | Orefield | 175 | <MRL | <MRL | 0 | No PFAS detected |
| Creswell Heights Jt Auth | PA5040063 | South Heights | 15,000 | <MRL | <MRL | 0 | No PFAS detected |
| Croyle Twp Water Auth | PA4110299 | Summerhill | 989 | <MRL | <MRL | 0 | No PFAS detected |
| Dallastown Yoe Water Auth | PA7670085 | Dallastown | 12,300 | <MRL | <MRL | 0 | No PFAS detected |
| Danville Municipal Water Auth | PA4470007 | Danville | 4,992 | <MRL | <MRL | 0 | Other PFAS detected |
| Denver Boro | PA7360017 | Denver | 3,861 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Derry Boro Muni Auth | PA5650049 | Derry | 6,500 | <MRL | <MRL | 0.007 | Hazard Index below its limit |
| Dillsburg Area Authority | PA7670071 | Dillsburg | 8,962 | 4.8 | 4.7 | 0.332 | PFOA 1–3 × its limit |
| Dover Twp Water Sys | PA7670073 | Dover | 21,097 | 5.9 | 9.6 | 0.003 | PFOS 1–3 × its limit |
| Downingtown Water Authority | PA1150026 | Downingtown | 9,900 | 4.2 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Doylestown Boro Water Dept | PA1090081 | Doylestown | 8,700 | 14.6 | 11.3 | 0.984 | PFOA ≥ 3 × its limit |
| Dtma Main System | PA1090128 | Doylestown | 8,655 | 14.2 | 13.4 | 0.742 | PFOA ≥ 3 × its limit |
| Duquesne Water Dept | PA5020012 | Duquesne | 5,565 | <MRL | <MRL | 0 | No PFAS detected |
| E Armstrong Cnty Muni Auth | PA5030004 | Elderton | 1,875 | <MRL | <MRL | 0 | No PFAS detected |
| E Stroudsburg Boro Water Dept | PA2450023 | East Stroudsburg | 13,000 | <MRL | <MRL | 0 | No PFAS detected |
| Eagle Lake Community Assoc | PA2350833 | Gouldsboro | 3,500 | 8.1 | <MRL | 0 | PFOA 1–3 × its limit |
| East Cocalico Township Auth | PA7360113 | Denver | 6,735 | 4.5 | 4.9 | 0.003 | PFOS 1–3 × its limit |
| East Donegal | PA7360083 | Columbia | 4,048 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| East Hempfield Water Auth | PA7360063 | Landisville | 20,988 | 9 | 5 | 0.004 | PFOA 1–3 × its limit |
| East Penn Mfg Co | PA3060681 | Lyon Station | 6,170 | <MRL | <MRL | 0 | No PFAS detected |
| East Petersburg Borough | PA7360135 | East Petersburg | 6,215 | 6.3 | 15.2 | 0.343 | PFOS ≥ 3 × its limit |
| Easton Area Water System | PA3480050 | Easton | 96,867 | <MRL | <MRL | 0 | No PFAS detected |
| Ebensburg Boro Muni Auth | PA4110009 | Ebensburg | 8,500 | <MRL | <MRL | 0 | No PFAS detected |
| Edgeworth Boro Muni Auth | PA5020015 | Leetsdale | 7,781 | <MRL | <MRL | 0 | No PFAS detected |
| Edinboro Water Authority | PA6250022 | Edinboro | 7,800 | <MRL | <MRL | 0 | No PFAS detected |
| Eei Meadows Complex | PA2400115 | Dallas | 628 | <MRL | 5.9 | 0.002 | PFOS 1–3 × its limit |
| Elizabethtown Area Water | PA7360124 | Elizabethtown | 19,000 | <MRL | 5.7 | 0.003 | PFOS 1–3 × its limit |
| Ellsworth Boro Water Dept | PA5630044 | Ellsworth | 1,250 | <MRL | <MRL | 0 | No PFAS detected |
| Emmaus Borough Public Water | PA3390032 | Emmaus | 14,000 | 22.4 | 153 | 13.303 | PFOS ≥ 3 × its limit |
| Emporium Water Company | PA6120002 | Emporium | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Ephrata Area Joint Authority | PA7360045 | Ephrata | 24,500 | 5.8 | 4.6 | 0.363 | PFOA 1–3 × its limit |
| Erie City Water Authority | PA6250028 | Erie | 220,001 | <MRL | <MRL | 0 | No PFAS detected |
| Evitts Creek Water Co | PA4050028 | Bedford | 100 | <MRL | <MRL | 0 | No PFAS detected |
| Fairview Twp Water Auth Dist 3 | PA6250040 | Fairview | 3,320 | <MRL | <MRL | 0 | No PFAS detected |
| Fairview Twp Water District 1 | PA6250087 | Fairview | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Falls Twp Water & Sewer Dept | PA1090022 | Fairless Hills | 24,400 | <MRL | <MRL | 0 | Other PFAS detected |
| Fannett Metal Sch Dist | PA7280369 | Willow Hill | 600 | <MRL | <MRL | 0 | No PFAS detected |
| Fawn Frazer Jt Water Auth | PA5020076 | Natrona Heights | 4,650 | <MRL | <MRL | 0 | Other PFAS detected |
| Finale Partners | PA1090329 | New Hope | 150 | 16.8 | 9.7 | 0.003 | PFOA ≥ 3 × its limit |
| Findlay Twp Municipal Auth | PA5020078 | Clinton | 11,460 | <MRL | <MRL | 0 | No PFAS detected |
| Fishertown Water Assn | PA4050029 | Fishertown | 801 | <MRL | <MRL | 0 | No PFAS detected |
| Fleetwood Boro Water System | PA3060029 | Fleetwood | 4,218 | <MRL | <MRL | 0 | No PFAS detected |
| Fox Chapel Auth | PA5020040 | Pittsburgh | 18,500 | <MRL | <MRL | 0 | No PFAS detected |
| Foxcroft Manor Mobile Home Pk | PA4410166 | Williamsport | 200 | <MRL | <MRL | 0 | No PFAS detected |
| Franklin System York Water | PA7280045 | York | 4,400 | <MRL | <MRL | 0 | No PFAS detected |
| Freeland Boro Muni Water Auth | PA2400054 | Freeland | 4,610 | 5.6 | 9.1 | 0.002 | PFOS 1–3 × its limit |
| Geisinger Medical Center | PA4470012 | Danville | 6,442 | <MRL | <MRL | 0 | No PFAS detected |
| General Authority Of Franklin | PA6610020 | Franklin | 9,096 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Gettysburg Muni Auth | PA7010019 | Gettysburg | 12,425 | 7.4 | 14.1 | 0.002 | PFOS ≥ 3 × its limit |
| Girard Boro Water Dept | PA6250049 | Girard | 3,301 | <MRL | <MRL | 0 | No PFAS detected |
| Glendale Valley Municipal Auth | PA4110060 | Flinton | 3,200 | <MRL | <MRL | 0 | No PFAS detected |
| Greater Johnstown Wa Riverside | PA4110034 | Johnstown | 49,500 | <MRL | <MRL | 0 | No PFAS detected |
| Greencastle Area Water Auth | PA7280014 | Greencastle | 5,500 | <MRL | <MRL | 0 | No PFAS detected |
| Grove City Boro Water Dept | PA6430040 | Grove City | 7,871 | <MRL | <MRL | 0 | No PFAS detected |
| Guilford Water Auth | PA7280038 | Chambersburg | 28,135 | <MRL | <MRL | 0 | No PFAS detected |
| Hamburg Muni Water&Sewer Auth | PA3060035 | Hamburg | 4,990 | <MRL | <MRL | 0 | No PFAS detected |
| Hampton Shaler Water Authority | PA5020019 | Allison Park | 61,949 | <MRL | <MRL | 0 | No PFAS detected |
| Hanover Muni Water Works | PA7670076 | Hanover | 40,900 | <MRL | <MRL | 0 | Other PFAS detected |
| Harmony Boro Water Auth | PA5100042 | Harmony | 6,669 | <MRL | <MRL | 0 | Other PFAS detected |
| Harrison Twp Water Auth | PA5020108 | Natrona Heights | 13,411 | <MRL | <MRL | 0 | No PFAS detected |
| Hastings Muni Auth | PA4110013 | Hastings | 2,100 | <MRL | <MRL | 0 | No PFAS detected |
| Hca Hazleton Division | PA2408001 | Hazleton | 45,000 | <MRL | <MRL | 0 | No PFAS detected |
| Hegins Hubley Authority | PA3540047 | Valley View | 3,870 | <MRL | <MRL | 0 | No PFAS detected |
| Hellertown Borough Authority | PA3480052 | Hellertown | 5,800 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Hemlock Farms (Main) | PA2520033 | Lords Valley | 8,321 | <MRL | <MRL | 0 | No PFAS detected |
| Hickory Hills Mhc | PA3480015 | Bath | 800 | <MRL | <MRL | 0 | No PFAS detected |
| Highland S & W Auth Beaverdam | PA4110017 | Johnstown | 22,617 | <MRL | <MRL | 0 | No PFAS detected |
| Highridge Water Auth | PA5650069 | Blairsville | 16,000 | 4.3 | 4.5 | 0.55 | PFOS 1–3 × its limit |
| Hilltown Twp Water&Sewer Auth | PA1090117 | Sellersville | 5,770 | 8 | 6.8 | 0.003 | PFOA 1–3 × its limit |
| Hollidaysburg Muni Auth | PA4070017 | Hollidaysburg | 8,523 | <MRL | <MRL | 0 | No PFAS detected |
| Horsham Water&Sewer Authority | PA1460033 | Horsham | 26,000 | 17.5 | 33.8 | 1.063 | PFOS ≥ 3 × its limit |
| Houtzdale Municipal Authority | PA6170023 | Houtzdale | 8,410 | <MRL | <MRL | 0 | No PFAS detected |
| Humboldt Industrial Park | PA2400806 | Hazleton | 11,243 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Huntingdon Boro Water Dept | PA4310012 | Huntingdon | 13,776 | <MRL | <MRL | 0 | No PFAS detected |
| Icmsa Crooked Creek | PA5320109 | Indiana | 9,638 | <MRL | <MRL | 0 | No PFAS detected |
| Indian Creek Valley Water Auth | PA5260011 | Indian Head | 7,000 | <MRL | <MRL | 0 | No PFAS detected |
| Jersey Shore Area Jnt Wat Auth | PA4410156 | Jersey Shore | 6,600 | <MRL | <MRL | 0 | No PFAS detected |
| Kennett Square Mun Water Works | PA1150108 | Kennett Square | 6,328 | 17.7 | 14.4 | 0.422 | PFOA ≥ 3 × its limit |
| Kittanning Suburb Jt Water Aut | PA5030043 | Adrian | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Kline Township Mun Authority | PA3540014 | Mcadoo | 6,700 | <MRL | <MRL | 0 | No PFAS detected |
| Knoebels Grove Park | PA4190398 | Elysburg | 4,000 | <MRL | <MRL | 0 | No PFAS detected |
| Kutztown Borough Water | PA3060041 | Kutztown | 14,200 | <MRL | <MRL | 0 | No PFAS detected |
| Lakeview Mobilehome Park | PA5100080 | Valencia | 44 | <MRL | <MRL | 0 | No PFAS detected |
| Lansford Coaldale Jt Water Aut | PA3130004 | Lansford | 9,300 | <MRL | <MRL | 0 | No PFAS detected |
| Latrobe Muni Auth | PA5650060 | Latrobe | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lawn Turnpike Plaza | PA7381001 | Glen Rock | 880 | <MRL | <MRL | 0 | No PFAS detected |
| Lca Allentown Division | PA3390024 | Allentown | 118,000 | <MRL | 4.4 | 0.002 | PFOS 1–3 × its limit |
| Lca North Whitehall Division | PA3390055 | Allentown | 2,910 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Lca Wlsa Central Division | PA3390073 | Allentown | 47,693 | 4.4 | <MRL | 0.31 | PFOA 1–3 × its limit |
| Lebanon Water Auth | PA7380010 | Lebanon | 57,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lehighton Water Authority | PA3130009 | Lehighton | 9,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lehman Jackson Elementary | PA2400370 | Lehman | 875 | 5.2 | 5.5 | 1.34 | PFOS 1–3 × its limit |
| Lititz Boro | PA7360126 | Lititz | 9,397 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Littlestown Boro | PA7010022 | Littlestown | 7,300 | 4.5 | 12.9 | 0.603 | PFOS ≥ 3 × its limit |
| London Grove Twp Mun Auth | PA1150165 | West Grove | 4,770 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Lower Bucks Co Joint Mun Auth | PA1090026 | Levittown | 63,007 | <MRL | <MRL | 0 | No PFAS detected |
| Lower Saucon Authority | PA3480027 | Bethlehem | 5,700 | <MRL | <MRL | 0 | No PFAS detected |
| Lutheran Home At Topton | PA3060094 | Topton | 410 | <MRL | <MRL | 0 | No PFAS detected |
| Mahanoy Twp Auth | PA3540011 | Mahanoy City | 5,584 | <MRL | <MRL | 0 | No PFAS detected |
| Maidencreek Twp Water Auth | PA3060012 | Blandon | 7,505 | <MRL | <MRL | 0 | Other PFAS detected |
| Manheim Area Water & Sewer Aut | PA7360078 | Manheim | 6,701 | 12.8 | 7.9 | 0.003 | PFOA ≥ 3 × its limit |
| Manheim Auto Auction | PA7360345 | Manheim | 1,426 | <MRL | 8.1 | 0.46 | PFOS 1–3 × its limit |
| Manor Twp Jt Muni Auth | PA5030006 | Ford City | 6,744 | <MRL | <MRL | 0 | No PFAS detected |
| Mansfield Borough Mun Auth | PA2590038 | Mansfield | 4,100 | <MRL | <MRL | 0 | No PFAS detected |
| Maple Manor Mhp | PA5100071 | Slippery Rock | 37 | <MRL | <MRL | 0 | No PFAS detected |
| Masonic Homes | PA7360025 | Elizabethtown | 3,707 | 4.8 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Masontown Muni Water Works | PA5260013 | Masontown | 3,841 | <MRL | <MRL | 0 | No PFAS detected |
| Mawc Sweeney Plant | PA5650032 | Greensburg | 143,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mawc Yough Plant | PA5260036 | Greensburg | 133,000 | <MRL | <MRL | 0 | No PFAS detected |
| Meadville Area Water Authority | PA6200036 | Meadville | 17,339 | <MRL | <MRL | 0 | No PFAS detected |
| Merck And Co Inc | PA1461065 | West Point | 8,550 | <MRL | <MRL | 0 | Other PFAS detected |
| Meshoppen Borough Water Co | PA2660010 | Meshoppen | 563 | <MRL | <MRL | 0 | No PFAS detected |
| Middlesex Twp Muni Auth | PA7210063 | Carlisle | 3,527 | <MRL | <MRL | 0 | No PFAS detected |
| Mifflin Cnty Muni Auth | PA4440010 | Milroy | 29,432 | <MRL | <MRL | 0 | No PFAS detected |
| Mifflinburg Boro Water Dept | PA4600012 | Mifflinburg | 3,690 | <MRL | <MRL | 0 | No PFAS detected |
| Mifflintown Muni Auth | PA4340008 | Mifflintown | 4,450 | <MRL | <MRL | 0 | No PFAS detected |
| Milford Twp Water Authority | PA1090125 | Quakertown | 4,497 | <MRL | <MRL | 0.31 | Hazard Index below its limit |
| Millersburg Water Auth | PA7220034 | Millersburg | 4,600 | 4.5 | 10 | 0.35 | PFOS 1–3 × its limit |
| Millersville Univ | PA7360127 | Millersville | 7,950 | 5.4 | 5.3 | 0.313 | PFOA 1–3 × its limit |
| Millville Municipal Authority | PA4190017 | Millville | 969 | <MRL | <MRL | 0 | No PFAS detected |
| Minersville Municipal Water Au | PA3540035 | Minersville | 7,275 | <MRL | <MRL | 0 | No PFAS detected |
| Monaca Boro Water Dept | PA5040039 | Monaca | 6,500 | <MRL | <MRL | 1.113 | Hazard Index 1–3 × its limit |
| Monroeville Municipal Auth | PA5020027 | Monroeville | 48,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Montoursville Water Company | PA4410175 | Montoursville | 4,983 | 6.6 | 12.1 | 0.31 | PFOS ≥ 3 × its limit |
| Moon Twp Muni Auth | PA5020011 | Moon Township | 38,000 | <MRL | 10 | 0.7 | PFOS 1–3 × its limit |
| Morrisville Munic Authority | PA1090037 | Morrisville | 13,342 | <MRL | <MRL | 0 | Other PFAS detected |
| Mountain Water Assn | PA5260032 | Fairchance | 3,856 | <MRL | <MRL | 0 | No PFAS detected |
| Mt Airy Casino & Resort | PA2450677 | Mount Pocono | 7,000 | <MRL | <MRL | 0 | No PFAS detected |
| Mt Hope Est & Winery | PA7360320 | Manheim | 2,500 | 4.1 | <MRL | 0.009 | PFOA 1–3 × its limit |
| Mt Joy Boro Auth | PA7360091 | Mount Joy | 15,261 | <MRL | <MRL | 0 | Other PFAS detected |
| Mt Penn Boro Muni Auth | PA3060082 | Reading | 10,400 | <MRL | 5.7 | 0.77 | PFOS 1–3 × its limit |
| Mt Union Municipal Auth | PA4310016 | Mount Union | 5,801 | <MRL | <MRL | 0 | No PFAS detected |
| Muhlenberg Twp Muni Auth | PA3060038 | Reading | 22,400 | 8.8 | 11.5 | 0.432 | PFOS 1–3 × its limit |
| Mun Auth Of Boro Of Bedford | PA4050002 | Bedford | 5,127 | <MRL | <MRL | 0 | No PFAS detected |
| Mun Water Auth Of Aliquippa | PA5040006 | Aliquippa | 15,685 | <MRL | <MRL | 0 | Other PFAS detected |
| Muni Auth Of Washington Twp | PA5260009 | Belle Vernon | 9,100 | <MRL | <MRL | 0 | No PFAS detected |
| Municipal Authority Of Corry | PA6250012 | Corry | 7,800 | <MRL | <MRL | 0 | No PFAS detected |
| Municipal Authority Sunbury | PA4490007 | Sunbury | 11,043 | <MRL | <MRL | 0 | No PFAS detected |
| Municipal Water Auth Adams Twp | PA5100141 | Mars | 8,700 | <MRL | <MRL | 0 | No PFAS detected |
| Myerstown Water Auth | PA7380025 | Myerstown | 9,500 | <MRL | <MRL | 0 | No PFAS detected |
| N Middleton Water Auth | PA7210049 | Carlisle | 8,455 | 8 | 16.9 | 0.354 | PFOS ≥ 3 × its limit |
| Nanty Glo Water Auth | PA4110023 | Nanty Glo | 3,152 | <MRL | <MRL | 0 | Other PFAS detected |
| Neville Twp Water Dept | PA5020029 | Pittsburgh | 6,750 | <MRL | <MRL | 0 | No PFAS detected |
| New Freedom Boro Water Auth | PA7670082 | New Freedom | 4,464 | <MRL | <MRL | 0.626 | Hazard Index below its limit |
| New Holland Borough | PA7360099 | New Holland | 8,490 | 5.1 | 8.3 | 0.722 | PFOS 1–3 × its limit |
| New Kensington Muni Auth | PA5650070 | New Kensington | 47,800 | <MRL | <MRL | 0 | No PFAS detected |
| New Oxford Munci Auth | PA7010025 | New Oxford | 3,963 | 4.3 | 4.8 | 0.003 | PFOS 1–3 × its limit |
| New Sewickley Twp Muni Auth | PA5040085 | Rochester | 4,276 | <MRL | <MRL | 0.013 | Hazard Index below its limit |
| New Wilmington Boro Water Dept | PA6370035 | New Wilmington | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Newtown Artesian Water Co | PA1090043 | Newtown | 38,500 | 12.3 | 7.9 | 0.004 | PFOA ≥ 3 × its limit |
| Newville Boro Water Auth | PA7210041 | Newville | 2,070 | <MRL | <MRL | 0 | No PFAS detected |
| North East Borough Water Dept | PA6250061 | North East | 4,601 | <MRL | <MRL | 0 | No PFAS detected |
| North Fayette Cnty Muni Auth | PA5260019 | Dunbar | 35,409 | <MRL | <MRL | 0 | No PFAS detected |
| North Penn Water Authority | PA1460034 | Lansdale | 91,941 | 5.1 | <MRL | 0.002 | PFOA 1–3 × its limit |
| North Sewickley Mun Water Auth | PA5040010 | Beaver Falls | 4,578 | <MRL | <MRL | 0.008 | Hazard Index below its limit |
| North Wales Water Authority | PA1460048 | North Wales | 72,496 | 13 | 11.1 | 0.563 | PFOA ≥ 3 × its limit |
| Northampton Boro Muni Auth | PA3480057 | Northampton | 40,000 | <MRL | <MRL | 0 | No PFAS detected |
| Northampton Bucks Co Mun Auth | PA1090089 | Richboro | 36,750 | 19.6 | 23 | 0.553 | PFOS ≥ 3 × its limit |
| Northern Cambria Muni Water | PA4110003 | Northern Cambria | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Nwwa Warrington Township | PA1090070 | North Wales | 21,588 | <MRL | <MRL | 0 | Other PFAS detected |
| Oakmont Water Authority | PA5020036 | Oakmont | 39,901 | <MRL | <MRL | 0 | No PFAS detected |
| Oil City | PA6610023 | Oil City | 9,608 | <MRL | <MRL | 0 | No PFAS detected |
| Outlet Shops At Gettysburg | PA7010952 | Gettysburg | 6,500 | 4.5 | 4.4 | 0.002 | PFOA 1–3 × its limit |
| Oxford Borough | PA1150066 | Oxford | 5,280 | 4.3 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Pa Amer Water Co | PA7220017 | Hummelstown | 50,200 | 4.3 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Pa Amer Water Co Brownell | PA2359001 | Wilkes Barre | 12,560 | <MRL | <MRL | 0 | No PFAS detected |
| Pa Amer Water Co Ellwood Cty | PA6370011 | New Castle | 17,200 | <MRL | <MRL | 0.011 | Hazard Index below its limit |
| Pa Amer Water Co Frackville | PA3540032 | Milton | 5,583 | <MRL | 15 | 1.35 | PFOS ≥ 3 × its limit |
| Pa Amer Water Co Lake Scranton | PA2359008 | Wilkes Barre | 137,142 | 4.9 | 7.6 | 0.002 | PFOS 1–3 × its limit |
| Pa Amer Water Co New Castle | PA6370034 | New Castle | 43,279 | <MRL | <MRL | 0 | Other PFAS detected |
| Pa Amer Water Co Susquehanna | PA2580024 | Clarks Summit | 4,230 | <MRL | <MRL | 0 | No PFAS detected |
| Pa Amer Water Co-Pittsburgh | PA5020039 | Elrama | 686,000 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Audubon | PA1460055 | Norristown | 8,200 | 30.8 | 57.9 | 1.072 | PFOS ≥ 3 × its limit |
| Pa American Coatesville | PA1150106 | Coatesville | 36,960 | <MRL | <MRL | 0 | Other PFAS detected |
| Pa American Dilliner System | PA5300012 | Dilliner | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Norristown | PA1460046 | Norristown | 88,885 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Pa American Royersford | PA1150166 | Spring City | 49,508 | 9.1 | 10.7 | 0.503 | PFOS 1–3 × its limit |
| Pa American Water Berwick | PA4190013 | Milton | 15,282 | 7.9 | 4 | 0.002 | PFOA 1–3 × its limit |
| Pa American Water Co Butler | PA5100012 | New Castle | 43,286 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Co Clarion | PA6160001 | New Castle | 10,372 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Co Kane | PA6420019 | New Castle | 5,725 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Co Warren | PA6620020 | Warren | 14,650 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Co West | PA7210029 | Mechanicsburg | 105,127 | 4.9 | 10.4 | 0.002 | PFOS 1–3 × its limit |
| Pa American Water Co Yardley | PA1090074 | Yardley | 33,171 | 9.7 | 6.1 | 0.002 | PFOA 1–3 × its limit |
| Pa American Water Co-Indiana D | PA5320025 | New Castle | 22,360 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Kittanning | PA5030008 | New Castle | 4,499 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Punxsy | PA6330010 | New Castle | 8,419 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American Water Steelton | PA7220036 | Hummelstown | 6,428 | <MRL | <MRL | 0 | No PFAS detected |
| Pa American White Deer | PA4490023 | Mechanicsburg | 30,209 | <MRL | <MRL | 0 | No PFAS detected |
| Pa-American Water Co-Connellsv | PA5260022 | Uniontown | 11,425 | <MRL | <MRL | 0 | No PFAS detected |
| Pa-American Water- Uniontown | PA5260020 | Uniontown | 23,125 | <MRL | <MRL | 0 | No PFAS detected |
| Pa-American Water-Brownsville | PA5260005 | Mcmurry | 7,844 | <MRL | <MRL | 0 | No PFAS detected |
| Palmerton Municipal Authority | PA3130012 | Palmerton | 7,000 | 42.5 | 40 | 3.15 | PFOA ≥ 3 × its limit |
| Paradise Stream Resor | PA2450542 | Mount Pocono | 774 | <MRL | 4.8 | 0 | PFOS 1–3 × its limit |
| Paw Ceasetown | PA2409002 | Scranton | 58,467 | <MRL | <MRL | 0 | No PFAS detected |
| Paw Crystal Lake | PA2409003 | Scranton | 9,773 | <MRL | <MRL | 0 | Other PFAS detected |
| Paw Glen Alsace Div | PA3060088 | Mechanicsburg | 24,951 | 5.8 | 12.7 | 0.544 | PFOS ≥ 3 × its limit |
| Paw Huntsville | PA2409013 | Scranton | 11,987 | <MRL | <MRL | 0 | No PFAS detected |
| Paw Nesbitt | PA2409010 | Scranton | 52,640 | <MRL | <MRL | 0 | No PFAS detected |
| Paw Penn District | PA3060069 | Reading | 28,508 | 6.5 | 16.4 | 1.022 | PFOS ≥ 3 × its limit |
| Paw Philipsburg | PA4140087 | Philipsburg | 20,865 | <MRL | <MRL | 0 | No PFAS detected |
| Paw Watres | PA2409011 | Scranton | 52,002 | <MRL | <MRL | 0 | No PFAS detected |
| Pawc Bangor | PA3480038 | Clarks Summit | 9,008 | <MRL | <MRL | 0 | No PFAS detected |
| Pawc Blue Mountain | PA3480055 | Clarks Summit | 23,763 | <MRL | <MRL | 0 | No PFAS detected |
| Pawc Penn Estates | PA2450065 | Tobyhanna | 4,300 | <MRL | <MRL | 0 | No PFAS detected |
| Pawc Pocono District | PA2450063 | Tobyhanna | 17,860 | 5.7 | 5.2 | 0.003 | PFOA 1–3 × its limit |
| Pawc Saw Creek Estates | PA2520062 | Tobyhanna | 7,016 | <MRL | <MRL | 0 | No PFAS detected |
| Penn National Gaming | PA7220059 | Grantville | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Penn State Univ | PA4140095 | University Park | 37,000 | <MRL | <MRL | 0 | No PFAS detected |
| Penns Creek Municipal Auth | PA4550019 | Penns Creek | 725 | <MRL | <MRL | 0 | No PFAS detected |
| Perkasie Regional Authority | PA1090046 | Sellersville | 15,000 | 6.5 | 17.6 | 0.51 | PFOS ≥ 3 × its limit |
| Philadelphia Water Department | PA1510001 | Philadelphia | 1,600,000 | 8.1 | 6 | 0.453 | PFOA 1–3 × its limit |
| Phoenixville Water Dept | PA1150077 | Phoenixville | 16,599 | 5.9 | 5.1 | 0.005 | PFOA 1–3 × its limit |
| Pike Twp Municipal Authority | PA6170013 | Curwensville | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Pittsburgh Intl Airport | PA5020947 | Pittsburgh | 26,915 | <MRL | 7 | 0.47 | PFOS 1–3 × its limit |
| Pittsburgh Water & Sewer Auth | PA5020038 | Pittsburgh | 520,000 | <MRL | <MRL | 0 | No PFAS detected |
| Pleasant Valley Water Auth | PA5260006 | Connellsville | 3,630 | <MRL | <MRL | 0 | No PFAS detected |
| Plum Boro Muni Auth | PA5020041 | Pittsburgh | 27,500 | <MRL | <MRL | 0 | No PFAS detected |
| Plumstead Northern System | PA1090144 | Pipersville | 2,605 | 7.5 | 7.4 | 0.004 | PFOA 1–3 × its limit |
| Portage Boro Muni Auth | PA4110027 | Portage | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Pottstown Borough Water Auth | PA1460037 | Pottstown | 36,000 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Quakertown Boro | PA1090082 | Quakertown | 12,800 | 10.8 | 14.3 | 2.71 | PFOS ≥ 3 × its limit |
| Radisson Valley Forge Hotel | PA1460492 | King Of Prussia | 3,500 | 5.4 | 4 | 0.002 | PFOA 1–3 × its limit |
| Reading Area Water Authority | PA3060059 | Reading | 95,100 | 6.6 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Red Lion Municipal Authority | PA7670086 | Red Lion | 15,882 | <MRL | <MRL | 0 | No PFAS detected |
| Reserve Twp Water Dept | PA5020047 | Pittsburgh | 3,204 | <MRL | <MRL | 0 | No PFAS detected |
| Richland Twp Water Authority | PA1090131 | Quakertown | 6,800 | 7.1 | 8.3 | 0.512 | PFOS 1–3 × its limit |
| Richland Twp Water Authority | PA5020018 | Gibsonia | 10,190 | <MRL | <MRL | 0 | No PFAS detected |
| Ridgway Borough Water System | PA6240012 | Ridgway | 4,700 | <MRL | <MRL | 0 | No PFAS detected |
| Roamingwood Sewer And Water | PA2640025 | Lake Ariel | 3,775 | <MRL | <MRL | 0 | No PFAS detected |
| Robinson Twp Muni Auth | PA5020045 | Pittsburgh | 16,354 | <MRL | <MRL | 0 | No PFAS detected |
| Rockwood Boro Muni Auth | PA4560020 | Rockwood | 1,250 | <MRL | <MRL | 0 | No PFAS detected |
| Salisbury Twp Water System | PA3390062 | Allentown | 8,522 | 4.5 | 4.2 | 0.002 | PFOA 1–3 × its limit |
| Schuylkill Co Mun Auth | PA3540038 | Pottsville | 31,850 | <MRL | <MRL | 0 | No PFAS detected |
| Schuylkill Haven Boro Water | PA3540041 | Schuylkill Haven | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Schwenksville Borough Auth | PA1460042 | Schwenksville | 5,200 | 5.4 | 8.3 | 0.003 | PFOS 1–3 × its limit |
| Selinsgrove Muni Auth | PA4550005 | Selinsgrove | 5,584 | <MRL | <MRL | 0 | No PFAS detected |
| Seneca & Cranberry Mall Dist | PA6610031 | Seneca | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Seven Springs Muni Auth | PA4560024 | Champion | 3,000 | <MRL | <MRL | 0 | No PFAS detected |
| Sewickley Boro Water Auth | PA5020050 | Sewickley | 6,800 | <MRL | <MRL | 0.333 | Hazard Index below its limit |
| Sharpsville Boro Water Co | PA6430055 | Sharpsville | 5,029 | <MRL | <MRL | 0 | Other PFAS detected |
| Shillington Muni Auth | PA3060067 | Reading | 13,300 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Shippensburg Boro Water Auth | PA7210043 | Shippensburg | 17,800 | <MRL | <MRL | 0 | No PFAS detected |
| Shohola Falls Trails End Sys#2 | PA2520941 | Shohola | 3,933 | <MRL | <MRL | 0 | No PFAS detected |
| Shrewsbury Borough | PA7670088 | Shrewsbury | 4,727 | 5.9 | 11.2 | 0.453 | PFOS 1–3 × its limit |
| Skyview Gardens Heights Apts | PA7500030 | Olyphant | 186 | <MRL | <MRL | 0 | No PFAS detected |
| Slatington Borough Water Sys | PA3390039 | Slatington | 4,450 | <MRL | <MRL | 0 | No PFAS detected |
| Slippery Rock Muni Auth | PA5100079 | Slippery Rock | 15,778 | <MRL | <MRL | 0 | No PFAS detected |
| Somerset Boro Muni Water Auth | PA4560042 | Somerset | 6,309 | <MRL | <MRL | 0 | No PFAS detected |
| Somerset Twp Muni Auth Oakridg | PA4560046 | Somerset | 3,800 | <MRL | <MRL | 0 | No PFAS detected |
| South Middleton Twp Water Auth | PA7210050 | Boiling Springs | 11,695 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Southwestern Cambria Cnty Auth | PA4110041 | Johnstown | 4,400 | <MRL | <MRL | 0 | No PFAS detected |
| Southwestern Pa Water Auth | PA5300017 | Jefferson | 40,200 | <MRL | <MRL | 0 | No PFAS detected |
| Spring Twp Water Authority | PA4140118 | Bellefonte | 3,300 | <MRL | <MRL | 0.42 | Hazard Index below its limit |
| Springdale Boro Water Dept | PA5020053 | Springdale | 3,405 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| St Marys Area Water Auth | PA6240016 | Saint Marys | 19,588 | <MRL | <MRL | 0 | No PFAS detected |
| State College Boro Water Auth | PA4140096 | State College | 72,000 | <MRL | <MRL | 0 | No PFAS detected |
| State Corr Inst Benner Twp | PA4140098 | Bellefonte | 2,850 | <MRL | 5.1 | 0 | PFOS 1–3 × its limit |
| State Correctional Inst | PA7210046 | Camp Hill | 2,522 | <MRL | 5.3 | 0.002 | PFOS 1–3 × its limit |
| Stewartstown Boro Water Auth | PA7670062 | Stewartstown | 5,206 | 4.6 | 4.1 | 0.003 | PFOA 1–3 × its limit |
| Suburban Lock Haven Water Auth | PA4180049 | Mill Hall | 9,700 | <MRL | <MRL | 0 | No PFAS detected |
| Summit Township Water Authorit | PA6250090 | Erie | 12,500 | <MRL | <MRL | 0 | No PFAS detected |
| Swt Main System | PA3390065 | Allentown | 14,500 | 4 | <MRL | 0 | PFOA 1–3 × its limit |
| Tamaqua Area Water Authority | PA3540012 | Tamaqua | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Tarentum Boro Water Dept | PA5020055 | Tarentum | 4,927 | <MRL | <MRL | 0 | No PFAS detected |
| Telford Borough Authority | PA1460050 | Telford | 7,700 | 14.9 | 15.2 | 0.553 | PFOS ≥ 3 × its limit |
| Tilden Industrial Park | PA3061067 | Hamburg | 4,000 | <MRL | <MRL | 0.007 | Hazard Index below its limit |
| Titusville Municipal Water | PA6200051 | Titusville | 6,146 | <MRL | 5.7 | 0 | PFOS 1–3 × its limit |
| Tobyhanna Army Depot | PA2450053 | Tobyhanna | 3,800 | <MRL | <MRL | 0 | No PFAS detected |
| Towanda Municipal Authority | PA2080029 | Towanda | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Tri Cnty Jt Muni Auth | PA5630045 | Fredericktown | 10,100 | <MRL | <MRL | 0 | No PFAS detected |
| Tunkhannock Boro Munic Auth | PA2660014 | Tunkhannock | 5,349 | 4.8 | 6.6 | 0 | PFOS 1–3 × its limit |
| Tyrone Boro Water Auth | PA4070021 | Tyrone | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Union City Municipal Authority | PA6250064 | Union City | 4,295 | <MRL | <MRL | 0 | No PFAS detected |
| Upmc Magee Womens Hospital | PA5020883 | Pittsburgh | 4,900 | <MRL | <MRL | 0 | Other PFAS detected |
| Upmc Montefiore | PA5020806 | Pittsburgh | 4,500 | <MRL | <MRL | 0 | No PFAS detected |
| Upmc Presbyterian | PA5020808 | Pittsburgh | 8,200 | <MRL | <MRL | 0 | No PFAS detected |
| Upmc Shadyside Hillman Campus | PA5020898 | Pittsburgh | 4,750 | <MRL | <MRL | 0 | No PFAS detected |
| Upper Hanover Water Authority | PA1460036 | East Greenville | 4,600 | 6.2 | 5.5 | 1.12 | PFOA 1–3 × its limit |
| Upper Leacock Township | PA7360140 | Leola | 7,734 | 8.1 | 9.5 | 0.372 | PFOS 1–3 × its limit |
| Upper Saucon Twp Water Supply | PA3390077 | Center Valley | 7,300 | <MRL | <MRL | 0 | Other PFAS detected |
| Upper Southampton Mun Auth | PA1090063 | Southampton | 16,000 | 14.2 | 16.4 | 0.504 | PFOS ≥ 3 × its limit |
| Va Pittsburgh Ud | PA5020955 | Pittsburgh | 6,701 | <MRL | <MRL | 0 | No PFAS detected |
| Veolia Mechanicsburg | PA7210028 | Harrisburg | 45,013 | 7.1 | 11.4 | 0.003 | PFOS 1–3 × its limit |
| Veolia Middletown | PA7220038 | Middletown | 9,600 | 7.5 | 12.7 | 0.612 | PFOS ≥ 3 × its limit |
| Veolia Newberry System | PA7670061 | Harrisburg | 6,480 | 10 | 10 | 0.372 | PFOA 1–3 × its limit |
| Veolia Water | PA7220015 | Harrisburg | 110,000 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Veolia Water Bethel | PA1230012 | Harrisburg | 7,809 | 22.3 | <MRL | 0.972 | PFOA ≥ 3 × its limit |
| Veolia Water Pa Dallas | PA2400076 | Harrisburg | 7,563 | 4.1 | 7.9 | 0.35 | PFOS 1–3 × its limit |
| Veolia Water Pa Inc Bloomsburg | PA4190008 | Bloomsburg | 29,382 | <MRL | <MRL | 0 | No PFAS detected |
| Warminster Municipal Authority | PA1090069 | Warminster | 36,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Warwick Twp Lititz Sys | PA7360116 | Lititz | 8,561 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Warwick Twp Water & Sewer Auth | PA1090127 | Jamison | 14,699 | 7.6 | 7.1 | 0.532 | PFOA 1–3 × its limit |
| Washington Twp Muni Auth | PA7280026 | Waynesboro | 6,134 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Twp Water System | PA6250092 | Edinboro | 797 | <MRL | <MRL | 0 | No PFAS detected |
| Waterford Municipal Authority | PA6250065 | Waterford | 1,700 | <MRL | <MRL | 0 | No PFAS detected |
| Wellsboro Municipal Authority | PA2590042 | Wellsboro | 8,225 | <MRL | <MRL | 0 | No PFAS detected |
| Wernersville Muni Water Auth | PA3060076 | Wernersville | 7,920 | 4.2 | <MRL | 0.002 | PFOA 1–3 × its limit |
| West Cnty Muni Auth-Mckeesport | PA5020025 | Greensburg | 32,644 | <MRL | <MRL | 0 | No PFAS detected |
| West Earl Water Authority | PA7360143 | Brownstown | 4,327 | <MRL | <MRL | 0 | Other PFAS detected |
| West Manchester Twp Auth | PA7670101 | York | 9,960 | 6.3 | 11.1 | 0.333 | PFOS 1–3 × its limit |
| West Reading Boro Water | PA3060078 | West Reading | 4,300 | 4.2 | <MRL | 0.002 | PFOA 1–3 × its limit |
| West View Water Authority | PA5020043 | Pittsburgh | 200,000 | <MRL | <MRL | 0 | No PFAS detected |
| Western Allegheny County Mun A | PA5020034 | Oakdale | 19,031 | <MRL | 5.2 | 0.37 | PFOS 1–3 × its limit |
| Whitehall Twp Authority | PA3390081 | Whitehall | 13,063 | 4.9 | 5.4 | 0.7 | PFOS 1–3 × its limit |
| Wilkinsburg-Penn Jt Water Auth | PA5020056 | Wilkinsburg | 125,000 | <MRL | <MRL | 0 | No PFAS detected |
| Williamsport Mun Water Auth | PA4410173 | Williamsport | 51,000 | <MRL | 5.1 | 1.33 | Hazard Index 1–3 × its limit |
| Windber Area Auth | PA4560013 | Windber | 9,463 | <MRL | <MRL | 0 | No PFAS detected |
| Womelsdorf Robesonia Jt Auth | PA3060080 | Newmanstown | 7,070 | <MRL | <MRL | 0 | No PFAS detected |
| Wrightsville Boro Muni Auth | PA7670097 | Wrightsville | 4,076 | <MRL | <MRL | 0 | Other PFAS detected |
| Wyomissing Boro Water System | PA3060083 | Wyomissing | 8,500 | 4.7 | <MRL | 0.002 | PFOA 1–3 × its limit |
| York Water Co | PA7670100 | York | 206,762 | <MRL | <MRL | 0 | No PFAS detected |
| Zelienople Boro | PA5100093 | Zelienople | 4,123 | 4.2 | <MRL | 0.009 | PFOA 1–3 × its limit |
Not tested under UCMR 5 (2,510)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| 143 Swiftwater Llc | PA2450934 | NTNCWS | Pocono Lake | 45 | Monroe County |
| 2452 Quakertown Rd | PA1460002 | NTNCWS | Pennsburg | 80 | Montgomery County |
| 266 West Lancaster Ave | PA1150625 | NTNCWS | Exton | 30 | Chester County |
| 322 Properties Llc | PA7360333 | NTNCWS | East Earl | 30 | Lancaster County |
| 48Forty Solutions | PA7010942 | NTNCWS | Biglerville | 75 | Adams County |
| 6185 Plaza Llc | PA2451375 | NTNCWS | Pocono Lake | 96 | Monroe County |
| 994 Penn Bank Operations Cent | PA7220819 | NTNCWS | Harrisburg | 34 | Dauphin County |
| A B C #2 Mobile Home Park | PA4410010 | CWS | Muncy | 75 | Lycoming County |
| A C Valley Development Corp | PA5101010 | NTNCWS | Foxburg | 500 | Butler County |
| A Childs Future Elc | PA3390367 | NTNCWS | Allentown | 62 | Lehigh County |
| Abraxas Academy | PA3060127 | CWS | Morgantown | 156 | Berks County |
| Abraxas Youth And Family | PA6270005 | NTNCWS | Marienville | 350 | Forest County |
| Abwe | PA7671020 | NTNCWS | New Cumberland | 95 | York County |
| Aces Gourmet | PA2451193 | NTNCWS | Gilbert | 39 | Monroe County |
| Acorn Acres | PA7360020 | CWS | Intercourse | 50 | Lancaster County |
| Acorns To Oaks Childcare Ctr | PA2590343 | NTNCWS | Wellsboro | 80 | Tioga County |
| Adams Cnty Christian Academy | PA7010964 | NTNCWS | Gettysburg | 163 | Adams County |
| Adams Cnty Fac Ctr | PA7010056 | CWS | Gettysburg | 456 | Adams County |
| Adams Mfg Plant #1 | PA5101049 | NTNCWS | Portersville | 28 | Butler County |
| Adams Mfg Plant 2 | PA5101035 | NTNCWS | Portersville | 160 | Butler County |
| Adams Twp Municipal Authority | PA4550006 | CWS | Troxelville | 225 | Snyder County |
| Adamstown Borough | PA7360001 | CWS | Adamstown | 1,800 | Lancaster County |
| Addison Area Water Auth | PA4560028 | CWS | Addison | 284 | Somerset County |
| Adesa Fleet Leasing | PA7670315 | NTNCWS | York | 40 | York County |
| Adesa Mercer | PA6430824 | NTNCWS | Carmel | 225 | Mercer County |
| Adventure Academy I | PA3540984 | NTNCWS | Orwigsburg | 74 | Schuylkill County |
| Ahlstrom Filtration Llc | PA7210344 | NTNCWS | Mt Holly Springs | 40 | Cumberland County |
| Ahn Wexford Hospital | PA5020963 | NTNCWS | Wexford | 1,072 | Allegheny County |
| Aiken Water Company | PA6420010 | CWS | Smethport | 850 | McKean County |
| Air Liquide | PA1090931 | NTNCWS | Plumsteadville | 150 | Bucks County |
| Air Liquide | PA3480914 | NTNCWS | Mount Bethel | 25 | Northampton County |
| Airgas Healthcare | PA1090928 | NTNCWS | Plumsteadville | 200 | Bucks County |
| Albert Gallatin Muni Auth | PA5260027 | CWS | Point Marion | 2,695 | Fayette County |
| Alburtis Borough Authority | PA3390045 | CWS | Alburtis | 2,117 | Lehigh County |
| Aleppo Twp Auth | PA5020070 | CWS | Sewickley | 2,200 | Allegheny County |
| Alex Acres Mhp | PA7220007 | CWS | Morgantown | 108 | Dauphin County |
| Alexandria Boro Water Auth | PA4310021 | CWS | Alexandria | 815 | Huntingdon County |
| Allegheny East Conf | PA3060984 | NTNCWS | Boyertown | 260 | Berks County |
| Allegheny General Hospital | PA5020956 | NTNCWS | Pittsburgh | 2,595 | Allegheny County |
| Allegheny Valley Hospital | PA5020958 | NTNCWS | Natrona Heights | 908 | Allegheny County |
| Allensville Muni Auth | PA4440008 | CWS | Allensville | 480 | Mifflin County |
| Alphabet Garden Childcare | PA1090308 | NTNCWS | Southampton | 100 | Bucks County |
| Alvord Polk Inc | PA7220491 | NTNCWS | Millersburg | 135 | Dauphin County |
| Amazon | PA2350335 | NTNCWS | Gouldsboro | 25 | Lackawanna County |
| Amazon Upper Bern Warehouse | PA3061267 | NTNCWS | Mechanicsburg | 450 | Berks County |
| Amber Hill Mhp | PA7670125 | CWS | York Haven | 70 | York County |
| Amblebrook | PA7010066 | CWS | York | 450 | Adams County |
| American Modern Homes | PA2080013 | CWS | Montoursville | 100 | Bradford County |
| American Tempo Village Park | PA4410002 | CWS | Williamsport | 88 | Lycoming County |
| Americold | PA2350320 | NTNCWS | Covington Township | 70 | Lackawanna County |
| Amy Pyshers Childcare | PA3480903 | NTNCWS | Bath | 38 | Northampton County |
| Anchor Crossing Shopping Ctr | PA1091085 | NTNCWS | Philadelphia | 250 | Bucks County |
| Anchor Estates | PA7010017 | CWS | Elizabethtown | 300 | Adams County |
| Anchor Presbyterian Church | PA1090368 | NTNCWS | Wrightstown | 25 | Bucks County |
| Anne Mclaughlins Child Care | PA2400463 | NTNCWS | Sybertsville | 75 | Luzerne County |
| Anthracite Industries Inc | PA4490322 | NTNCWS | Sunbury | 30 | Northumberland County |
| Antrim Township Municipal Auth | PA7280063 | CWS | Greencastle | 1,149 | Franklin County |
| Api Technologies Mfg | PA6250825 | NTNCWS | Fairview | 300 | Erie County |
| Apple Blossom Lane Mhp | PA4070050 | CWS | Morgantown | 31 | Blair County |
| Appleville Mobile Home Park | PA1150094 | CWS | Coatesville | 461 | Chester County |
| Apx Enclosures Inc | PA7280963 | NTNCWS | Greencastle | 190 | Franklin County |
| Aqua Pa Applewood | PA2400083 | CWS | White Haven | 95 | Luzerne County |
| Aqua Pa Barrett | PA2400085 | CWS | White Haven | 107 | Luzerne County |
| Aqua Pa Beech Mountain | PA2400114 | CWS | White Haven | 2,646 | Luzerne County |
| Aqua Pa Bunker Hill | PA2660018 | CWS | White Haven | 210 | Wyoming County |
| Aqua Pa Clarendon | PA6620021 | CWS | Sharon | 840 | Warren County |
| Aqua Pa Country Club Gardens | PA3390028 | CWS | White Haven | 268 | Lehigh County |
| Aqua Pa Crawford Div | PA6200014 | CWS | Sharon | 2,300 | Crawford County |
| Aqua Pa Eagle Rock Utilities | PA3540070 | CWS | White Haven | 3,050 | Luzerne County, Schuylkill County |
| Aqua Pa East Cameron | PA4490011 | CWS | Shamokin | 200 | Northumberland County |
| Aqua Pa East Pikeland | PA1150006 | CWS | Bryn Mawr | 675 | Chester County |
| Aqua Pa East Pointe | PA3061153 | CWS | Bryn Mawr | 75 | Berks County |
| Aqua Pa Emlenton | PA6610019 | CWS | Dubois | 915 | Venango County |
| Aqua Pa Factoryville | PA2660036 | CWS | White Haven | 2,323 | Wyoming County |
| Aqua Pa Fieldcrest | PA2400012 | CWS | White Haven | 112 | Luzerne County |
| Aqua Pa Forest Park | PA2400078 | CWS | White Haven | 420 | Luzerne County |
| Aqua Pa Franklin | PA1150126 | CWS | Bryn Mawr | 265 | Chester County |
| Aqua Pa Garbush | PA2400089 | CWS | White Haven | 203 | Luzerne County |
| Aqua Pa Geigertown Water Sys | PA3060030 | CWS | Bryn Mawr | 200 | Berks County |
| Aqua Pa Golden Oaks | PA3130054 | CWS | White Haven | 224 | Carbon County |
| Aqua Pa Greenbriar | PA2400147 | CWS | White Haven | 222 | Luzerne County |
| Aqua Pa Hamilton Water Co | PA2450044 | CWS | White Haven | 1,500 | Monroe County |
| Aqua Pa Hex Acres | PA2400053 | CWS | White Haven | 386 | Luzerne County |
| Aqua Pa Hillcrest Estates Ii | PA3060133 | CWS | Bryn Mawr | 214 | Berks County |
| Aqua Pa Honeybrook | PA1150195 | CWS | Bryn Mawr | 1,600 | Chester County |
| Aqua Pa Inc Meribah Water Co | PA4340018 | CWS | Shamokin | 135 | Juniata County |
| Aqua Pa Jefferson Heights | PA2350057 | CWS | White Haven | 556 | Lackawanna County |
| Aqua Pa Kratzerville | PA4550008 | CWS | Shamokin | 435 | Snyder County |
| Aqua Pa Laurel Lakes | PA2400111 | CWS | White Haven | 552 | Luzerne County |
| Aqua Pa Links At Gettysburg Sy | PA7010057 | CWS | Royersford | 398 | Adams County |
| Aqua Pa Maple Hills | PA3390049 | CWS | White Haven | 164 | Lehigh County |
| Aqua Pa Midway | PA2400104 | CWS | White Haven | 2,450 | Luzerne County |
| Aqua Pa Mifflin Township | PA4190016 | CWS | Shamokin | 1,220 | Columbia County |
| Aqua Pa Monroe Twp | PA4550009 | CWS | Shamokin | 2,400 | Snyder County |
| Aqua Pa Mountainhome System | PA2450039 | CWS | Honesdale | 1,450 | Monroe County |
| Aqua Pa Mt Jewett | PA6420018 | CWS | Sharon | 972 | McKean County |
| Aqua Pa Oakhill | PA2400095 | CWS | White Haven | 434 | Luzerne County |
| Aqua Pa Oneida | PA3540071 | CWS | White Haven | 734 | Schuylkill County |
| Aqua Pa Paupackan Lake Estates | PA2640048 | CWS | White Haven | 800 | Wayne County |
| Aqua Pa Peddlers View | PA1090147 | CWS | Bryn Mawr | 600 | Bucks County |
| Aqua Pa Penn Lake | PA2400079 | CWS | White Haven | 278 | Luzerne County |
| Aqua Pa Pennsview System | PA4550024 | CWS | Shamokin | 350 | Snyder County |
| Aqua Pa Perkiomen Woods | PA1460068 | CWS | Bryn Mawr | 1,100 | Montgomery County |
| Aqua Pa Pinecrest | PA2450086 | CWS | Honesdale | 500 | Monroe County |
| Aqua Pa Rhodes Terrace | PA2400101 | CWS | White Haven | 82 | Luzerne County |
| Aqua Pa Rivercrest | PA2660017 | CWS | White Haven | 625 | Wyoming County |
| Aqua Pa Robin Hood Lakes | PA2450093 | CWS | White Haven | 541 | Monroe County |
| Aqua Pa Sand Springs | PA2400140 | CWS | White Haven | 1,898 | Luzerne County |
| Aqua Pa Shickshinny Lake | PA2400029 | CWS | White Haven | 250 | Luzerne County |
| Aqua Pa Springhouse Farms | PA3390068 | CWS | White Haven | 645 | Lehigh County |
| Aqua Pa St Johns Estates | PA2400144 | CWS | White Haven | 106 | Luzerne County |
| Aqua Pa Stonecroft | PA3060134 | CWS | Bryn Mawr | 600 | Berks County |
| Aqua Pa Sun Valley | PA2450054 | CWS | Whitehaven | 120 | Monroe County |
| Aqua Pa Superior Center Point | PA1460092 | CWS | Bryn Mawr | 500 | Montgomery County |
| Aqua Pa Superior Ivy Ridge | PA1460007 | CWS | Bryn Mawr | 150 | Montgomery County |
| Aqua Pa Superior Meadowbrook | PA3060137 | CWS | Bryn Mawr | 250 | Berks County |
| Aqua Pa Superior Suburbia Ctr | PA1150547 | NTNCWS | Bryn Mawr | 500 | Chester County |
| Aqua Pa Tafton Wilson Hill | PA2520061 | CWS | Honesdale | 80 | Pike County |
| Aqua Pa Tanglewood Lakes | PA2520065 | CWS | Honesdale | 1,321 | Pike County |
| Aqua Pa Tanglwood North | PA2520066 | CWS | Honesdale | 690 | Pike County |
| Aqua Pa The Pines | PA3540069 | CWS | White Haven | 160 | Schuylkill County |
| Aqua Pa Upper Providence | PA1460015 | CWS | Bryn Mawr | 810 | Montgomery County |
| Aqua Pa Wapwallopen | PA2400066 | CWS | White Haven | 165 | Luzerne County |
| Aqua Pa Warden Place | PA2400102 | CWS | White Haven | 175 | Luzerne County |
| Aqua Pa Washington Park | PA2660016 | CWS | White Haven | 300 | Wyoming County |
| Aqua Pa Water Co Waymart | PA2640032 | CWS | White Haven | 1,100 | Wayne County |
| Aqua Pa Water Co Brooklyn | PA2580010 | CWS | White Haven | 44 | Susquehanna County |
| Aqua Pa Water Co Chinchilla | PA2350004 | CWS | White Haven | 904 | Lackawanna County |
| Aqua Pa Water Co Edgewood | PA2350055 | CWS | White Haven | 382 | Lackawanna County |
| Aqua Pa Water Co Elmbrook | PA2350034 | CWS | Honesdale | 300 | Lackawanna County |
| Aqua Pa Water Co Garden Hills | PA2640017 | CWS | White Haven | 90 | Wayne County |
| Aqua Pa Water Co Glenburn | PA2350025 | CWS | White Haven | 150 | Lackawanna County |
| Aqua Pa Water Co Gouldsboro | PA2640022 | CWS | Honesdale | 350 | Wayne County |
| Aqua Pa Water Co Hawley | PA2640028 | CWS | White Haven | 1,800 | Wayne County |
| Aqua Pa Water Co Hop Bottom | PA2580012 | CWS | White Haven | 174 | Susquehanna County |
| Aqua Pa Water Co Moscow | PA2350027 | CWS | Honesdale | 600 | Lackawanna County |
| Aqua Pa Water Co Mount Cobb | PA2350070 | CWS | White Haven | 120 | Lackawanna County |
| Aqua Pa Water Co Pine Beach | PA2641005 | NTNCWS | White Haven | 122 | Wayne County |
| Aqua Pa Water Co Sci Waymart | PA2640020 | CWS | White Haven | 3,200 | Wayne County |
| Aqua Pa Water Co Sunset Hills | PA2350029 | CWS | White Haven | 145 | Lackawanna County |
| Aqua Pa Water Co Thornhurst Cc | PA2350053 | CWS | White Haven | 500 | Lackawanna County |
| Aqua Pa Wayne County Prison | PA2640031 | CWS | White Haven | 160 | Wayne County |
| Aqua Pa Wh Christian Springs | PA3480030 | CWS | White Haven | 153 | Northampton County |
| Aqua Pa White Haven | PA2400108 | CWS | White Haven | 1,200 | Luzerne County |
| Aqua Pa White Rock Acres Sys | PA7210048 | CWS | Royersford | 790 | Cumberland County, York County |
| Aqua Pa Whitehaven Evanwood | PA3480029 | CWS | White Haven | 60 | Northampton County |
| Aqua Pa Wild Pines Water Sys | PA2450141 | CWS | Honesdale | 440 | Monroe County |
| Aqua Pa Woodledge Village | PA2521031 | CWS | Honesdale | 58 | Pike County, Wayne County |
| Aqua Pa Yalick Farms | PA2400149 | CWS | White Haven | 442 | Luzerne County |
| Arbor Manor Apts | PA7500037 | CWS | Harrisburg | 76 | Perry County |
| Arbour Court | PA1150213 | CWS | Nassau | 180 | Chester County |
| Arcca Real Estate Corporation | PA1090309 | NTNCWS | Doylestown | 70 | Bucks County |
| Ardent Mills | PA3480518 | NTNCWS | Martins Creek | 64 | Northampton County |
| Ardex Americas | PA5040441 | NTNCWS | Aliquippa | 150 | Beaver County |
| Area B 12 Well | PA7380420 | NTNCWS | Annville | 30 | Lebanon County |
| Arelenes Angels Llc | PA7500890 | NTNCWS | Duncannon | 90 | Perry County |
| Arendtsville Muni Water Sys | PA7010001 | CWS | Arendtsville | 1,200 | Adams County |
| Armstrong Cement & Supply | PA5100975 | NTNCWS | Cabot | 75 | Armstrong County, Butler County |
| Arnold Apartments | PA2640042 | CWS | Brooklyn | 44 | Wayne County |
| Artesian Water Pa Inc | PA1150002 | CWS | Newark | 95 | Chester County |
| Asgco Building | PA3480517 | NTNCWS | Nazareth | 50 | Northampton County |
| Ashcombe Vegetable Farm & Deli | PA7210861 | NTNCWS | Mechanicsburg | 250 | Cumberland County |
| Ashfield Academy | PA3130329 | NTNCWS | Lehighton | 165 | Carbon County |
| Ashland Technologies Inc | PA3540889 | NTNCWS | Hegins | 25 | Schuylkill County |
| Aspen Ridge Poa | PA2640703 | CWS | Hawley | 100 | Wayne County |
| Aspinwall Boro Water Dept | PA5020003 | CWS | Pittsburgh | 3,151 | Allegheny County |
| Assemblies Of Yahweh | PA3061073 | NTNCWS | Bethel | 197 | Berks County |
| Assoc Ceramics & Tech Inc | PA5100821 | NTNCWS | Sarver | 41 | Butler County |
| Atlas Mineral & Chemical | PA3060838 | NTNCWS | Mertztown | 30 | Berks County |
| Auburn Municipal Authority | PA3540015 | CWS | Auburn | 920 | Schuylkill County |
| Audubon Park | PA7670121 | CWS | Carlisle | 145 | York County |
| Austin Borough Water | PA6530005 | CWS | Austin | 700 | Potter County |
| Autumn Grove Care Center | PA5100045 | CWS | Harrisville | 240 | Butler County |
| Autumn Hills Water Company | PA6200071 | CWS | Meadville | 338 | Crawford County |
| Avante Apartments | PA1460062 | CWS | Gilbertsville | 315 | Montgomery County |
| Avanti Cove Apts | PA6200967 | CWS | Meadville | 16 | Crawford County, Venango County |
| Avella Area School District | PA5630313 | NTNCWS | Avella | 850 | Washington County |
| Avon Grove Charter School | PA1150688 | NTNCWS | West Grove | 549 | Chester County |
| Avondale State Police Barracks | PA1150348 | NTNCWS | Jacksonville | 70 | Chester County |
| Avonwheel Estate Mhp | PA1150004 | CWS | Lemoyne | 300 | Chester County |
| Awc Valley Forge Crossing Mhp | PA1460035 | CWS | Norristown | 250 | Montgomery County |
| Aydin Displays Inc | PA3061158 | NTNCWS | Birdsboro | 77 | Berks County |
| B B Grocery Outlet Newburg | PA7210333 | NTNCWS | Quarryville | 675 | Cumberland County |
| B J Baldwin Electric Inc | PA7361105 | NTNCWS | Narvon | 40 | Lancaster County |
| Babes In Arms | PA7011032 | NTNCWS | Gettysburg | 44 | Adams County |
| Bainbridge Water Authority | PA7360003 | CWS | Bainbridge | 1,200 | Lancaster County |
| Bald Eagle Boys Camp | PA4180069 | CWS | Mill Hall | 43 | Clinton County |
| Bald Eagle State Park | PA4140823 | NTNCWS | Howard | 1,276 | Centre County |
| Bally Muni Water Works | PA3060002 | CWS | Bally | 2,146 | Berks County |
| Barc Production Services | PA1090353 | NTNCWS | Quakertown | 120 | Bucks County |
| Barkeyville Mun Authority | PA6610036 | CWS | Grove City | 1,600 | Venango County |
| Barley Creek Brewing Co | PA2451253 | NTNCWS | Tannersville | 600 | Monroe County |
| Barnhart Transportation | PA6251026 | NTNCWS | Harborcreek | 60 | Erie County |
| Barnsley Academy | PA1150318 | NTNCWS | Oxford | 42 | Chester County |
| Barnsley Academy | PA7360864 | NTNCWS | Quarryville | 35 | Lancaster County |
| Barr Area Municipal Authority | PA4110842 | NTNCWS | Nicktown | 60 | Cambria County |
| Bart Colerain Elem Sch | PA7361084 | NTNCWS | Quarryville | 273 | Lancaster County |
| Barton Court | PA2450005 | CWS | Berwyn | 118 | Monroe County |
| Bath Municipal Water Works | PA3480066 | CWS | Bath | 2,680 | Northampton County |
| Bbs Grocery Outlet | PA7360635 | NTNCWS | Quarryville | 135 | Lancaster County |
| Bc Montessori Country Day Sch | PA3061194 | NTNCWS | Reading | 125 | Berks County |
| Bciu At Pine Forge | PA3060337 | NTNCWS | Boyertown | 350 | Berks County |
| Bcra Pocono Jackson System | PA2450122 | CWS | East Stroudsburg | 2,100 | Monroe County |
| Bcwsa Fox Run Preserve | PA1090160 | CWS | Warrington | 220 | Bucks County |
| Bcwsa New Hope | PA1090130 | CWS | Warrington | 3,017 | Bucks County |
| Bcwsa Solebury | PA1090129 | CWS | Warrington | 2,100 | Bucks County |
| Bcwsa St Stephens Greene | PA1150210 | CWS | Warrington | 130 | Chester County |
| Beacon Lite Mobile Estates | PA5100017 | CWS | Slippery Rock | 100 | Butler County |
| Bear Creek Mountain Resort | PA3060310 | NTNCWS | Macungie | 4,500 | Berks County |
| Beartown Enterprise Llc | PA4050005 | CWS | Narvon | 50 | Bedford County |
| Beaver Brook Assoc | PA2400088 | CWS | Hazle Township | 150 | Luzerne County |
| Beaver Main Elem School | PA4190825 | NTNCWS | Bloomsburg | 116 | Columbia County |
| Beaver Meadows Borough | PA3130002 | CWS | Beaver Meadows | 968 | Carbon County |
| Beaver Run Water Association | PA3130038 | CWS | East Norriton | 50 | Carbon County |
| Beaver Valley Mhp | PA7360101 | CWS | Quarryville | 50 | Lancaster County |
| Beavertown Municipal Authority | PA4550012 | CWS | Beavertown | 935 | Snyder County |
| Beccaria Coalport Irvona M A | PA6170052 | CWS | Irvona | 1,875 | Cambria County, Clearfield County |
| Beck Manuf Div Of Anvil Inter | PA7280904 | NTNCWS | Waynesboro | 125 | Franklin County |
| Bedford Twp Muni Auth | PA4050037 | CWS | Bedford | 1,626 | Bedford County |
| Bedminster Elem School | PA1091098 | NTNCWS | Perkasie | 450 | Bucks County |
| Bedminster Mun Auth | PA1090104 | CWS | Perkasie | 3,042 | Bucks County |
| Beech Creek Borough Authority | PA4180035 | CWS | Beech Creek | 1,800 | Centre County, Clinton County |
| Beechcrest Properties Llc | PA2400042 | CWS | Masury | 25 | Luzerne County |
| Beistle Co | PA7210847 | NTNCWS | Shippensburg | 250 | Cumberland County |
| Bel Air Park Apts | PA4070060 | CWS | Duncansville | 44 | Blair County |
| Belfast Twp Muni Auth | PA4290004 | CWS | Needmore | 276 | Fulton County |
| Bell And Evans Plant 3 | PA7380449 | NTNCWS | Fredericksburg | 1,000 | Lebanon County |
| Bell Mark Technologies | PA7670336 | NTNCWS | Dover | 50 | York County |
| Belle Aire Acres | PA2350066 | CWS | Honesdale | 55 | Lackawanna County |
| Belle Meade Shohola Llc | PA2521066 | NTNCWS | Rocky Pointe | 35 | Pike County |
| Bellwood Boro Auth | PA4070009 | CWS | Bellwood | 3,162 | Blair County |
| Bendersville Muni Auth | PA7010002 | CWS | Bendersville | 1,039 | Adams County |
| Benners Mhp | PA4340006 | CWS | Thompsontown | 60 | Juniata County |
| Bentleyville Muni Auth | PA5630030 | CWS | Bentleyville | 2,600 | Washington County |
| Benton Foundry Inc | PA4190901 | NTNCWS | Benton | 250 | Columbia County |
| Benton Hills Mhp | PA2350005 | CWS | Dalton | 150 | Lackawanna County |
| Benton Municipal Water Auth | PA4190014 | CWS | Benton | 1,333 | Columbia County |
| Berk Tek | PA7360967 | NTNCWS | New Holland | 350 | Lancaster County |
| Berkleigh Heights Mhp Inc | PA3060040 | CWS | Fleetwood | 95 | Berks County |
| Berks Hill Estates | PA3060058 | CWS | Chadds Ford | 50 | Berks County |
| Berks Homes | PA3061174 | NTNCWS | Mohnton | 35 | Berks County |
| Berks Leisure Living | PA3060132 | CWS | Leesport | 49 | Berks County |
| Berlin Boro Muni Auth | PA4560029 | CWS | Berlin | 2,468 | Somerset County |
| Bermudian Springs Sch Dist | PA7010353 | NTNCWS | York Springs | 2,300 | Adams County |
| Bern Twp Muni Auth | PA3060045 | CWS | Reading | 1,800 | Berks County |
| Bernies Mobile Home Park | PA5100026 | CWS | Durham | 170 | Butler County |
| Bernville Borough | PA3060085 | CWS | Bernville | 1,010 | Berks County |
| Bessemer Borough Water Dept | PA6370003 | CWS | Bessemer | 1,100 | Lawrence County |
| Best Line Equipment | PA7220804 | NTNCWS | Harrisburg | 30 | Dauphin County |
| Beth 512 System | PA3480814 | CWS | Bethlehem | 725 | Northampton County |
| Beth Country Squire Estates | PA3480056 | CWS | Bethlehem | 87 | Northampton County |
| Beth Shady Lane System | PA3480022 | CWS | Bethlehem | 61 | Northampton County |
| Beth Wil Mar Manor | PA3480079 | CWS | Bethlehem | 90 | Northampton County |
| Bethany Childrens Home | PA3060092 | CWS | Womelsdorf | 200 | Berks County |
| Bethany Village | PA2640065 | CWS | Bethany | 99 | Wayne County |
| Bethel Baptist Church | PA1091385 | NTNCWS | Sellersville | 350 | Bucks County |
| Bethel Elementary Center | PA3060358 | NTNCWS | Bethel | 475 | Berks County |
| Bethel Umc & Preschool | PA1150654 | NTNCWS | Spring City | 50 | Chester County |
| Biddle Air National Guard Base | PA1460045 | NTNCWS | Horsham | 440 | Montgomery County |
| Big Bass Lake Water Assoc. | PA2640905 | CWS | Moscow | 130 | Wayne County |
| Big Boulder Mhp | PA7380012 | CWS | Coatesville | 40 | Lebanon County |
| Big Boulder Ski Area | PA3130306 | NTNCWS | Blakeslee | 800 | Carbon County |
| Big Spring Terrace Mhp | PA7210039 | CWS | Morgantown | 439 | Cumberland County |
| Big Woods | PA2520986 | NTNCWS | Hamlin | 175 | Pike County |
| Biglerville Water Co | PA7010020 | CWS | Biglerville | 2,501 | Adams County |
| Bills Plaza | PA2350829 | NTNCWS | Covington Twp | 501 | Lackawanna County |
| Bimbo Bakeries Usa Inc | PA4410318 | NTNCWS | Williamsport | 175 | Lycoming County |
| Birchwood Trailer Park | PA2450008 | CWS | Saylorsburg | 389 | Monroe County |
| Bird In Hand Family Inn & Rest | PA7360813 | NTNCWS | Bird In Hand | 490 | Lancaster County |
| Bird In Hand Farmers Mkt | PA7360313 | NTNCWS | Bird In Hand | 400 | Lancaster County |
| Black Hawk Mobile Home Park | PA4140046 | CWS | Morgantown | 100 | Centre County |
| Blacklick Valley Muni Auth | PA4110077 | CWS | Twin Rocks | 1,650 | Cambria County |
| Blain Water Co | PA7500018 | CWS | Blain | 321 | Perry County |
| Blair Mhp | PA4070016 | CWS | Elizabethtown | 185 | Blair County |
| Blair Twp Water & Sewer Auth | PA4070011 | CWS | Duncansville | 2,550 | Blair County |
| Blakeslee Plaza | PA2451282 | NTNCWS | Pittston | 81 | Monroe County |
| Blakeslee Village Shopping Ctr | PA2450331 | NTNCWS | Phillipsburg | 100 | Monroe County |
| Blarneystone Subdivision | PA4140134 | CWS | Julian | 75 | Centre County, Mifflin County |
| Blawnox Boro Water Dept | PA5020004 | CWS | Pittsburgh | 2,200 | Allegheny County |
| Bloomfield Boro Water Auth | PA7500012 | CWS | New Bloomfield | 1,170 | Perry County |
| Bloomsburg Christian School | PA4190905 | NTNCWS | Bloomsburg | 80 | Columbia County |
| Bloss Township Waterworks | PA2590044 | CWS | Arnot | 325 | Tioga County |
| Blossburg Municipal Authority | PA2590033 | CWS | Blossburg | 1,650 | Tioga County |
| Blue Heron Homeowners Assoc | PA3130040 | CWS | Moscow | 450 | Carbon County |
| Blue Heron Village | PA3060141 | CWS | Lenhartsville | 80 | Berks County, Schuylkill County |
| Blue Knob Water Co | PA4050001 | CWS | Claysburg | 300 | Bedford County, Blair County |
| Blue Mountain Academy | PA3060807 | NTNCWS | Hamburg | 200 | Berks County |
| Blue Mountain Heights Mhp | PA7210056 | CWS | Moscow | 162 | Cumberland County |
| Blue Mountain View | PA3130050 | CWS | Lehighton | 114 | Carbon County |
| Blue Mt 7 Day Adventist Sch | PA3061119 | NTNCWS | Hamburg | 51 | Berks County |
| Blue Mt Ski Area | PA3130945 | NTNCWS | Palmerton | 501 | Carbon County |
| Blue Mt Turnpike Plaza | PA7210348 | NTNCWS | Glen Rock | 900 | Cumberland County |
| Blue Mtn Elementary West | PA3540318 | NTNCWS | Orwigsburg | 375 | Schuylkill County |
| Blue Mtn Village On Chicola Lk | PA2450033 | CWS | Saylorsburg | 160 | Monroe County |
| Blue Ridge School Complex | PA2580322 | NTNCWS | New Milford | 1,450 | Susquehanna County |
| Blue Rock Mennonite Sch | PA7360583 | NTNCWS | Lancaster | 57 | Lancaster County |
| Blue Springs Terrace | PA4470008 | CWS | Bullville | 250 | Montour County |
| Bob Evans Gen Store | PA4050860 | NTNCWS | New Albany | 50 | Bedford County |
| Bonneauville Muni Water Auth | PA7010012 | CWS | Gettysburg | 2,730 | Adams County |
| Booneville Mutual Water Assoc | PA4180066 | CWS | Loganton | 87 | Clinton County |
| Borough Of Atglen | PA1150109 | CWS | Atglen | 1,406 | Chester County |
| Borough Of Avondale | PA1150005 | CWS | Avondale | 1,108 | Chester County |
| Borough Of Conway | PA5040022 | CWS | Conway | 2,176 | Beaver County |
| Borough Of Cornwall | PA7380007 | CWS | Lebanon | 3,343 | Lebanon County |
| Borough Of Dublin | PA1090107 | CWS | Dublin | 2,200 | Bucks County |
| Borough Of Howard | PA4140080 | CWS | Howard | 1,001 | Centre County |
| Borough Of Wampum Water Dept | PA6370032 | CWS | Wampum | 832 | Lawrence County |
| Boswell Boro Muni Auth | PA4560030 | CWS | Boswell | 2,900 | Somerset County |
| Bowmanstown Authority | PA3130021 | CWS | Bowmanstown | 900 | Carbon County |
| Bowmansville Travel Plaza | PA7360479 | NTNCWS | Glen Rock | 1,100 | Lancaster County |
| Boyd State Schuylkill Haven | PA3540981 | NTNCWS | Buffalo | 35 | Schuylkill County |
| Boyertown Earl Elem Sch | PA3060336 | NTNCWS | Boyertown | 313 | Berks County |
| Braddock Boro Water Auth | PA5020007 | CWS | Braddock | 1,708 | Allegheny County |
| Bradford County Sewer & Water | PA2080033 | CWS | Troy | 700 | Bradford County |
| Brady Hills Ml | PA5100869 | CWS | West Covina | 400 | Butler County |
| Brady Twp Water Association | PA6170036 | CWS | Luthersburg | 1,570 | Clearfield County |
| Brandon Maintenance | PA6610046 | CWS | Butler | 300 | Venango County |
| Brandywine Wallace Elem | PA1150572 | NTNCWS | Downingtown | 600 | Chester County |
| Brecknock Academy | PA3061100 | NTNCWS | Mohnton | 85 | Berks County |
| Brecknock Elementary School | PA7361059 | NTNCWS | New Holland | 500 | Lancaster County |
| Brinton Manor | PA1230006 | CWS | Glen Mills | 196 | Delaware County |
| Broadtop City Water Auth | PA4310023 | CWS | Broad Top | 350 | Huntingdon County |
| Brookline Manor | PA4340003 | CWS | Mifflintown | 100 | Juniata County |
| Brookline Retirement Village | PA4340001 | CWS | Mifflintown | 150 | Juniata County |
| Brookmont Health Care Center | PA2450002 | CWS | Effort | 229 | Monroe County |
| Brookside Commons | PA6200066 | CWS | Zelienople | 125 | Crawford County |
| Brookside Mobilehome Park | PA7360006 | CWS | Narvon | 176 | Lancaster County |
| Brookside Village Mhp | PA4190019 | CWS | Berwick | 475 | Columbia County |
| Brookwood Countryside | PA4050004 | CWS | Altoona | 200 | Bedford County |
| Brush Creek Country Estates | PA4050008 | CWS | Landisburg | 98 | Bedford County |
| Buck Co | PA7360880 | NTNCWS | Quarryville | 350 | Lancaster County |
| Buckeye Pipe Line Co | PA3390917 | NTNCWS | Emmaus | 210 | Lehigh County |
| Buckingham Friends School | PA1091101 | NTNCWS | Lahaska | 200 | Bucks County |
| Buckingham Green Center | PA1091355 | NTNCWS | Doylestown | 253 | Bucks County |
| Buckingham Heights | PA2640063 | CWS | Moscow | 57 | Wayne County |
| Buckingham Preserve | PA3060136 | CWS | Douglassville | 50 | Berks County |
| Buckingham Twp Fieldstone | PA1090123 | CWS | Buckingham | 281 | Bucks County |
| Buckingham Twp Furlong | PA1090159 | CWS | Buckingham | 4,150 | Bucks County |
| Buckingham Twp Mill Cr Ridge | PA1090164 | CWS | Buckingham | 99 | Bucks County |
| Buckingham Vly Rehab & Nursing | PA1090002 | CWS | Newtown | 190 | Bucks County |
| Bucknell View Mhp | PA4490004 | CWS | Morgantown | 100 | Northumberland County |
| Bucks Run Apartments | PA1090017 | CWS | Dublin | 130 | Bucks County |
| Buhl Community Water Company | PA6430049 | CWS | Mercer | 2,227 | Mercer County |
| Burger King Brodheadsville | PA2451071 | NTNCWS | Northampton | 500 | Monroe County |
| Burnley Workshop | PA2450409 | NTNCWS | Stroudsburg | 100 | Monroe County |
| Burnside Boro Water System | PA6170004 | CWS | Burnside | 325 | Clearfield County |
| C G Renn Elementary School | PA4410930 | NTNCWS | Hughesville | 200 | Lycoming County |
| Caesars Brookdale On The Lake | PA2450538 | NTNCWS | Scotrun | 350 | Monroe County |
| Cairnbrook Improvement Assn | PA4560021 | CWS | Cairnbrook | 910 | Somerset County |
| Calamus Estates | PA7360032 | CWS | Ronks | 140 | Lancaster County |
| Caledonia St Park | PA7280810 | NTNCWS | Fayetteville | 2,600 | Franklin County |
| Caln Mobile Home Park | PA1150150 | CWS | Peach Bottom | 30 | Chester County |
| Calvary Baptist Academy | PA5320365 | NTNCWS | Clymer | 90 | Indiana County |
| Calvary Bible Chapel | PA2400524 | NTNCWS | Hunlock Creek | 100 | Luzerne County |
| Calvary Chapel Harrisburg | PA7210886 | NTNCWS | Mechanicsburg | 25 | Cumberland County |
| Cambria Twp Water Auth | PA4110006 | CWS | Colver | 1,000 | Cambria County |
| Cambridge Area Joint Auth | PA6200003 | CWS | Cambridge Springs | 225 | Crawford County |
| Cambridge Springs Borough | PA6200004 | CWS | Cambridge Springs | 2,363 | Crawford County |
| Camelback Lodge & Waterpark | PA2451075 | NTNCWS | Tannersville | 200 | Monroe County |
| Camelback Ski Area Main Lodge | PA2450569 | NTNCWS | Tannersville | 200 | Monroe County |
| Camp Adahi & Adahi Kids | PA3060417 | NTNCWS | Mohnton | 120 | Berks County |
| Camp Hebron Cws | PA7220020 | CWS | Halifax | 75 | Dauphin County |
| Campbell Mfg Llc | PA3061062 | NTNCWS | Bechtelsville | 60 | Berks County |
| Camphill Soltane | PA1150223 | CWS | Glenmoore | 152 | Chester County |
| Camphill Spec Sch Beaver Farm | PA1150226 | CWS | Glenmoore | 45 | Chester County |
| Camphill Spec Sch Beaver Run | PA1150039 | CWS | Glenmoore | 140 | Chester County |
| Camphill Village Kimberton Hls | PA1150168 | CWS | Kimberton | 100 | Chester County |
| Can Do Corporate Center | PA2401021 | CWS | Hazleton | 1,291 | Luzerne County |
| Canaan Bible Chapel | PA2640508 | NTNCWS | Lake Ariel | 210 | Wayne County |
| Canal Mobile Home Park | PA2640012 | CWS | Morgantown | 200 | Wayne County |
| Canton Borough Authority | PA2080003 | CWS | Canton | 2,050 | Bradford County |
| Carbon County Correctional Fac | PA3130049 | CWS | Nesquehoning | 125 | Carbon County |
| Cargill Meat Solutions Corp | PA2080351 | NTNCWS | Wyalusing | 1,250 | Bradford County |
| Carousel Farm Ed Center | PA1091315 | NTNCWS | Ivyland | 100 | Bucks County |
| Carpenters Park Inc | PA4410031 | CWS | Linden | 120 | Lycoming County |
| Carroll Elem Sch | PA7500301 | NTNCWS | Elliottsburg | 385 | Perry County |
| Carroll Valley Water System | PA7010033 | CWS | York | 267 | Adams County |
| Carrolltown Boro Muni Auth | PA4110004 | CWS | Carrolltown | 850 | Cambria County |
| Carson Towers | PA5020082 | CWS | Pittsburgh | 266 | Allegheny County, Butler County |
| Casd Kings Highway Elem Sch | PA1150838 | NTNCWS | Thorndale | 521 | Chester County |
| Castle Hill Mhp | PA7010014 | CWS | Biglerville | 120 | Adams County |
| Castle Machine Company | PA7280954 | NTNCWS | Greencastle | 26 | Franklin County |
| Catawissa Municipal Water Auth | PA4190011 | CWS | Catawissa | 1,644 | Columbia County |
| Catherine Hershey School | PA7360570 | NTNCWS | Hershey | 150 | Lancaster County |
| Cavalry Heights Mhp | PA7010039 | CWS | Gettysburg | 80 | Adams County |
| Cbsd Buckingham Elem School | PA1090907 | NTNCWS | Doylestown | 450 | Bucks County |
| Cbsd Central Bucks East Hs | PA1090988 | NTNCWS | Doylestown | 1,725 | Bucks County |
| Cbsd Gayman Es | PA1090887 | NTNCWS | Doylestown | 600 | Bucks County |
| Cbsd Groveland Es | PA1090306 | NTNCWS | Doylestown | 961 | Bucks County |
| Cbsd Holicong Ms | PA1090989 | NTNCWS | Doylestown | 1,300 | Bucks County |
| Cbsd Tohickon Middle School | PA1090310 | NTNCWS | Doylestown | 1,100 | Bucks County |
| Cca Lehighton | PA3540894 | NTNCWS | Harrisburg | 60 | Schuylkill County |
| Cedar Acres Mobile Home Park | PA6370910 | CWS | New Castle | 95 | Lawrence County |
| Cedar Grove Mobile Home Park | PA3480037 | CWS | Bangor | 65 | Northampton County |
| Cedar Manor Mhp | PA7220002 | CWS | Morgantown | 432 | Dauphin County |
| Cemline Corp | PA5020933 | NTNCWS | Cheswick | 60 | Allegheny County |
| Cent Clinton Co Water Fil Auth | PA4180070 | CWS | Lock Haven | 25 | Clinton County |
| Centerville Muni Water Auth | PA4050027 | CWS | Bedford | 75 | Bedford County |
| Central City Water Auth | PA4560045 | CWS | Central City | 1,984 | Somerset County |
| Central Manor Elem Sch | PA7360566 | NTNCWS | Millersville | 550 | Lancaster County |
| Central Pa Assoc Llc | PA4550347 | NTNCWS | Selinsgrove | 65 | Snyder County |
| Centre County Mhc Llc | PA4140043 | CWS | Bethlehem | 100 | Centre County |
| Chadds Ford Elementary School | PA1150882 | NTNCWS | Kennett Square | 500 | Chester County |
| Chambersburg Waste Paper | PA7280952 | NTNCWS | Chambersburg | 75 | Franklin County |
| Champion Modular Homes Inc | PA4340819 | NTNCWS | Liverpool | 200 | Juniata County |
| Charles Cole Memorial Hospital | PA6530015 | CWS | Coudersport | 750 | Potter County |
| Charlestown Play House | PA1150753 | NTNCWS | Phoenixville | 90 | Chester County |
| Chase Manor Water Assoc | PA2400017 | CWS | Shavertown | 95 | Luzerne County |
| Chateau Resort And Con Center | PA2450932 | NTNCWS | Tannersville | 65 | Monroe County |
| Cherokee Pharmaceuticals Llc | PA4490803 | NTNCWS | Riverside | 230 | Northumberland County |
| Cherry Hill At Holiday Park | PA2640010 | CWS | Honesdale | 41 | Wayne County |
| Cherry Hill Mennonite School | PA3061297 | NTNCWS | Womelsdorf | 130 | Berks County |
| Cherry Hill Mobile Home Court | PA2640024 | CWS | Honesdale | 86 | Wayne County |
| Cherry Mobile Home Park | PA1090053 | CWS | Center Valley | 62 | Bucks County |
| Chesterbrook Academy | PA7360709 | NTNCWS | Leola | 300 | Lancaster County |
| Chestnut Grove Umc | PA7670378 | NTNCWS | Dillsburg | 25 | York County |
| Chestnut Ridge Mhp | PA3130011 | CWS | Lehighton | 152 | Carbon County |
| Chestnut Ridge School District | PA4050394 | NTNCWS | New Paris | 1,500 | Bedford County |
| Chestnuthill Twp Emg Op Center | PA2451447 | NTNCWS | Broadheadsville | 30 | Monroe County |
| Cheswick Boro Water Dept | PA5020008 | CWS | Cheswick | 1,861 | Allegheny County |
| Chetty Bldrs & Growing Place | PA1150354 | NTNCWS | Kennett Square | 170 | Chester County |
| Chicora Boro Water Supply | PA5100029 | CWS | Chicora | 1,100 | Butler County |
| Chicora Medical Center | PA5100127 | CWS | Chicora | 150 | Butler County |
| Childens Hospital Upmc | PA5020965 | NTNCWS | Pittsburgh | 3,000 | Allegheny County |
| Children Developmental Prog | PA1090337 | NTNCWS | Quakertown | 100 | Bucks County |
| Childtime Doylestown | PA1090830 | NTNCWS | Doylestown | 80 | Bucks County |
| Choconut Creek Apartments | PA2580047 | CWS | Binghamton | 50 | Susquehanna County |
| Choconut Valley Elementary | PA2580515 | NTNCWS | Friendsville | 300 | Susquehanna County |
| Christ Church | PA2590845 | NTNCWS | Wellsboro | 50 | Tioga County |
| Christ Luth Ch | PA3060679 | NTNCWS | Fleetwood | 150 | Berks County |
| Christian Life Assembly | PA2450948 | NTNCWS | Stroudsburg | 200 | Monroe County |
| Christiana Muni Water Auth | PA7360007 | CWS | Christiana | 1,100 | Chester County, Lancaster County |
| Christs Home For Children | PA7360176 | CWS | Paradise | 31 | Lancaster County |
| Circle M Campground | PA7360468 | NTNCWS | Durham | 60 | Lancaster County |
| Circle School | PA7220860 | NTNCWS | Harrisburg | 80 | Dauphin County |
| Clarendon Acres Water Co | PA2660033 | CWS | Tunkhannock | 280 | Wyoming County |
| Clarks Summit State Hospital | PA2350028 | CWS | Clarks Summit | 576 | Lackawanna County |
| Claverack Rural Electric Coop | PA2080803 | NTNCWS | Wysox | 30 | Bradford County |
| Clearbrook Treatment Centers | PA2400870 | NTNCWS | Wilkes Barre | 131 | Luzerne County |
| Clearview Elementary School | PA7671286 | NTNCWS | Red Lion | 431 | York County |
| Clearview Mennonite School | PA7360790 | NTNCWS | Manheim | 78 | Lancaster County |
| Clermont Water Association | PA6420006 | CWS | Mount Jewett | 38 | McKean County |
| Cliff View Mhp | PA7670024 | CWS | New Cumberland | 330 | York County |
| Clifford Township Muni Bldg | PA2580313 | NTNCWS | Clifford | 42 | Susquehanna County |
| Clintonville Boro Wtp | PA6610016 | CWS | Clintonville | 557 | Venango County |
| Cliu Lehigh Learning & Adj Sch | PA3391033 | NTNCWS | Schnecksville | 90 | Lehigh County |
| Clocktower Plaza | PA7361007 | NTNCWS | Morgantown | 500 | Lancaster County |
| Clubhouse For Kids Only | PA1090892 | NTNCWS | New Hope | 56 | Bucks County |
| Clymer Boro Muni Auth | PA5320009 | CWS | Clymer | 1,700 | Indiana County |
| Coaldale Six Mile Run Water | PA4050025 | CWS | Six Mile Run | 320 | Bedford County |
| Coatesville Veterans Adm Hosp | PA1150186 | CWS | Coatesville | 2,000 | Chester County |
| Cobbs Lake Preserve | PA2640066 | CWS | Lake Ariel | 200 | Wayne County |
| Cocalico Manor Mhp | PA7360170 | CWS | Silver Spring | 92 | Lancaster County |
| Cochranton Boro Water Dept | PA6200008 | CWS | Cochranton | 1,136 | Crawford County |
| Cochranville Mhp | PA1150202 | CWS | Lancaster | 99 | Chester County |
| Cogan Valley Mobile Home Park | PA4410152 | CWS | Tunkhannock | 250 | Lycoming County |
| Colc Heritage Christian Sch | PA7500880 | NTNCWS | Loysville | 110 | Perry County |
| Cole Mobile Home Park | PA5040078 | CWS | Darlington | 70 | Beaver County |
| Collan Park | PA2640847 | NTNCWS | Honesdale | 60 | Wayne County |
| Collinsville Mhp | PA7670067 | CWS | Elizabethtown | 28 | York County |
| Collomsville Mutual Waterworks | PA4410179 | CWS | Williamsport | 250 | Lycoming County |
| Colonial Glenn Estates | PA5040026 | CWS | Durham | 50 | Beaver County |
| Colonial Woods | PA1150793 | NTNCWS | Glenmoore | 25 | Chester County |
| Colony Cove East & South Hoa | PA2520209 | CWS | Tafton | 101 | Pike County |
| Columbia Co Christian School | PA4190911 | NTNCWS | Bloomsburg | 270 | Columbia County |
| Commodore Perry School | PA6430300 | NTNCWS | Hadley | 550 | Mercer County |
| Commons At Chadds Ford | PA1230365 | NTNCWS | Glen Mills | 100 | Delaware County |
| Community Bible Church & Sch | PA5040328 | NTNCWS | Aliquippa | 30 | Beaver County |
| Composidie Inc | PA5650351 | NTNCWS | Apollo | 129 | Westmoreland County |
| Concordia Lutheran Home | PA5100025 | CWS | Cabot | 950 | Butler County |
| Concrete Safety Systems | PA3061141 | NTNCWS | Bethel | 100 | Berks County |
| Conestoga Christian School | PA7360547 | NTNCWS | Morgantown | 300 | Lancaster County |
| Conestoga Elem Sch | PA7361063 | NTNCWS | Millersville | 325 | Lancaster County |
| Conestoga Hills Community | PA7360015 | CWS | Gap | 150 | Lancaster County |
| Conestoga Landfill (Bfi) | PA3061057 | NTNCWS | Morgantown | 40 | Berks County |
| Conestoga Mobile Home Park | PA7360014 | CWS | Willow Street | 65 | Lancaster County |
| Conestoga Valley Schools Admin | PA7360976 | NTNCWS | Leola | 35 | Lancaster County |
| Conestoga Valley Senior High | PA7360974 | NTNCWS | Leola | 1,900 | Lancaster County |
| Conestoga Wood Specialties | PA7360885 | NTNCWS | East Earl | 741 | Lancaster County |
| Conewago Ind Park | PA7360601 | NTNCWS | York | 1,600 | Lancaster County |
| Conewago Twp Elem Sch | PA7220377 | NTNCWS | Hummelstown | 250 | Dauphin County |
| Conewago Valley Mhp | PA7670021 | CWS | Dover | 225 | York County |
| Confluence Boro Muni Auth | PA4560033 | CWS | Confluence | 645 | Somerset County |
| Congregation Ohr Menachem | PA2450418 | NTNCWS | Canadensis | 30 | Monroe County |
| Conneaut Lake Middle School | PA6200320 | NTNCWS | Linesville | 450 | Crawford County |
| Conneaut Lake Park Water | PA6200018 | CWS | Harmonsburg | 250 | Crawford County |
| Conneautville Boro Water Dept | PA6200019 | CWS | Conneautville | 850 | Crawford County |
| Conodoguinet Mobile Est | PA7210061 | CWS | Morgantown | 265 | Cumberland County |
| Constellation Nuclear Pwr Plnt | PA1460847 | NTNCWS | Pottstown | 1,650 | Montgomery County |
| Constellation Training Center | PA1460980 | NTNCWS | Pottstown | 175 | Montgomery County |
| Controlled Molding Inc | PA6431109 | NTNCWS | Hadley | 50 | Mercer County |
| Conyngham Sugarloaf Joint Ma | PA2400048 | CWS | Conyngham | 3,230 | Luzerne County |
| Cook Green Lane Llc | PA1460360 | NTNCWS | Green Lane | 54 | Montgomery County |
| Cooks Mhp | PA2660027 | CWS | Plymouth | 92 | Wyoming County |
| Coopersburg Mun Water Auth | PA3390046 | CWS | Coopersburg | 2,570 | Lehigh County |
| Cooperstown Water Company | PA6610017 | CWS | Dubois | 360 | Venango County |
| Copper Kettle Mhp | PA2660008 | CWS | Berwick | 62 | Wyoming County |
| Coral Ridge Estates Mhp | PA5100105 | CWS | Brandon | 200 | Butler County |
| Cornerstone Care | PA5630838 | NTNCWS | Burgettstown | 100 | Washington County |
| Cornerstone Living | PA3391038 | CWS | New Tripoli | 44 | Lehigh County |
| Cornplanter Township | PA6610035 | CWS | Oil City | 1,835 | Venango County |
| Corry Field Installation | PA6250999 | NTNCWS | Corry | 30 | Erie County |
| Corry Two Mhc | PA6250008 | CWS | Dingmans Ferry | 88 | Erie County |
| Costco Innovel Solutions | PA2350331 | NTNCWS | Seattle | 99 | Lackawanna County |
| Country Acres Mhp | PA7380026 | CWS | Morgantown | 400 | Lebanon County |
| Country Acres Mobile Home Park | PA4190291 | CWS | Easton | 60 | Columbia County |
| Country Acres Personal Care | PA6610045 | CWS | Titusville | 35 | Venango County |
| Country Acres Trailer Court | PA6200023 | CWS | Guys Mills | 59 | Crawford County |
| Country Charm Day Care | PA2401076 | NTNCWS | Sugarloaf | 98 | Luzerne County |
| Country Club Of Harrisburg | PA7220365 | NTNCWS | Harrisburg | 100 | Dauphin County |
| Country Club Park | PA4140125 | CWS | Spring Mills | 75 | Centre County |
| Country Corner Rv Park | PA6430063 | CWS | Cochranton | 50 | Mercer County |
| Country Crest Mhp | PA2400036 | CWS | Moscow | 150 | Luzerne County |
| Country Estates | PA6430002 | CWS | Erie | 70 | Mercer County |
| Country Estates Mhp | PA6610038 | CWS | Kennerdell | 90 | Venango County |
| Country Gardens Trailer Court | PA6250055 | CWS | Lancaster | 180 | Erie County |
| Country Glen Townhomes | PA2450012 | CWS | Effort | 50 | Monroe County |
| Country Hills Apts | PA3540002 | CWS | Ambler | 40 | Schuylkill County |
| Country Junction | PA3130850 | NTNCWS | Lehighton | 500 | Carbon County |
| Country Kidz Daycare | PA6201235 | NTNCWS | Townville | 50 | Crawford County |
| Country Pines Mhp | PA2400050 | CWS | Fishkill | 280 | Luzerne County |
| Country Place Mhp | PA6170018 | CWS | Hiawatha | 225 | Clearfield County |
| Country Roads Mhp | PA6370019 | CWS | New Castle | 60 | Lawrence County |
| Country Terrace Estates | PA4190298 | CWS | Bloomsburg | 70 | Columbia County |
| Country View Est | PA7210065 | CWS | Morgantown | 330 | Cumberland County |
| Country View Manor | PA7360777 | NTNCWS | Quarryville | 35 | Lancaster County |
| Country View Manor Ywc | PA7670129 | CWS | York | 125 | York County |
| Country View Mhp | PA3060048 | CWS | Orefield | 98 | Berks County |
| Country View Village Lp | PA7500013 | CWS | Gap | 50 | Perry County |
| Country Village Mhp | PA2400041 | CWS | Dallas | 175 | Luzerne County |
| Countryside Christian Comm | PA7380001 | CWS | Annville | 100 | Lebanon County |
| Countryside Estates Mhp | PA6370005 | CWS | Pittsburgh | 39 | Lawrence County |
| Countryside Mhp | PA6200028 | CWS | Cochranton | 69 | Crawford County |
| Countryside Mhp | PA7500034 | CWS | Lewisberry | 60 | Perry County |
| Countryside Rest | PA7360346 | NTNCWS | New Holland | 40 | Lancaster County |
| Courtyard Offices | PA4550852 | NTNCWS | Selinsgrove | 175 | Snyder County |
| Cove Haven Resort | PA2640385 | NTNCWS | Lakeville | 350 | Wayne County |
| Coventry Terrace | PA1150069 | CWS | Banner Elk | 250 | Chester County |
| Covington Karthaus Girard A A | PA6170045 | CWS | Frenchville | 1,700 | Clearfield County |
| Cowanshan Yatesboro Numine Sys | PA5030047 | CWS | Numine | 1,200 | Armstrong County |
| Coylesville Court | PA5100036 | CWS | Shelocta | 76 | Butler County |
| Cozy Oaks Mhp | PA6430070 | CWS | Freeland | 65 | Mercer County |
| Cp Yeatman Home Office | PA1150314 | NTNCWS | West Grove | 100 | Chester County |
| Craley Mhp | PA7670038 | CWS | Palmyra | 35 | York County |
| Cranberry Village Mhp | PA5100050 | CWS | Cranberry Twp | 400 | Butler County |
| Cranesville Water Department | PA6250078 | CWS | Cranesville | 570 | Erie County |
| Crawford Christian Academy | PA6201234 | NTNCWS | Meadville | 150 | Crawford County |
| Crawford Township Authority | PA4180062 | CWS | Jersey Shore | 600 | Clinton County, Lycoming County |
| Creative Kids North | PA3391019 | NTNCWS | New Tripoli | 92 | Lehigh County |
| Creative Kids Of Downingtown | PA1150774 | NTNCWS | Downingtown | 85 | Chester County |
| Creek View Mobile Home Commun | PA7210001 | CWS | Carlisle | 80 | Cumberland County |
| Creekside Manor M H P | PA3130027 | CWS | Moscow | 63 | Carbon County |
| Creekside Mennonite School | PA4600876 | NTNCWS | Mifflinburg | 100 | Union County |
| Creekside Subdivision | PA7360129 | CWS | Mechanicsburg | 556 | Lancaster County |
| Creekview Farms Mhp | PA7500006 | CWS | Shermans Dale | 450 | Perry County |
| Creekview Mhp | PA1150083 | CWS | Norristown | 200 | Chester County |
| Crescent Lake | PA2450766 | CWS | Scotrun | 90 | Monroe County |
| Crescent Lake North Comm Assoc | PA2520086 | CWS | Milford | 93 | Pike County |
| Cresson Boro Water Sys | PA4110030 | CWS | Cresson | 1,600 | Cambria County |
| Cresson Twp Muni Auth | PA4110038 | CWS | Cresson | 2,500 | Cambria County |
| Crestview Elem Sch | PA7210301 | NTNCWS | Carlisle | 537 | Cumberland County |
| Crestview Mhp | PA4050007 | CWS | Bedford | 91 | Bedford County |
| Crestview Mobile Home Park | PA6200033 | CWS | Bethel Park | 35 | Crawford County |
| Crestview Village Mhp | PA7220024 | CWS | Annville | 223 | Dauphin County |
| Crestwood Community | PA7360052 | CWS | Parkesburg | 470 | Lancaster County |
| Crosby Water Association | PA6420012 | CWS | Smethport | 56 | McKean County |
| Cross Creek Community Church | PA2400371 | NTNCWS | Shavertown | 110 | Luzerne County |
| Cross Creek Resort | PA6610325 | NTNCWS | Titusville | 500 | Venango County |
| Cross Station Mobile Home Comm | PA6250044 | CWS | Harrisburg | 100 | Erie County |
| Crossroads Mhp | PA3480043 | CWS | New Tripoli | 30 | Northampton County |
| Crowe Transportation | PA7360941 | NTNCWS | Elizabethtown | 50 | Lancaster County |
| Crystal Springs Mhp | PA5100037 | CWS | Tarentum | 25 | Butler County |
| Crystal Window & Door | PA2350872 | NTNCWS | Dalton | 30 | Lackawanna County |
| Ctma Margaret | PA5030021 | CWS | Numine | 95 | Armstrong County |
| Ctma Sagamore | PA5030022 | CWS | Numine | 300 | Armstrong County |
| Cumberland Valley Trnpk Plaza | PA7210820 | NTNCWS | Glen Rock | 900 | Cumberland County |
| Cummings Lumber Company Inc | PA2080354 | NTNCWS | Troy | 50 | Bradford County |
| Cummins Power Systems | PA7220404 | NTNCWS | Summit | 75 | Dauphin County |
| Cupec Mobile Estates | PA5100087 | CWS | West Sunbury | 56 | Butler County |
| Curiosity Corner Day Care Ctr | PA1150599 | NTNCWS | Parkesburg | 70 | Chester County |
| Curiosity Shoppe School | PA1091113 | NTNCWS | Doylestown | 150 | Bucks County |
| Curryville Water Auth | PA4070298 | CWS | Curryville | 85 | Blair County |
| Cussewago Mennonite School | PA6200312 | NTNCWS | Conneautville, | 40 | Crawford County |
| Cypress Park | PA3130022 | CWS | Lehighton | 210 | Carbon County |
| D And H Trailer Park | PA4490021 | CWS | Morgantown | 50 | Northumberland County |
| D And S Estates | PA6610033 | CWS | Franklin | 61 | Venango County |
| D Water Company | PA3130030 | CWS | Olyphant | 150 | Carbon County |
| Dairy Farmers Of America | PA2590311 | NTNCWS | Middlebury Center | 50 | Tioga County |
| Dal-Tile Corporation | PA7010926 | NTNCWS | Gettysburg | 125 | Adams County |
| Dallas Mhp | PA2400052 | CWS | Fishkill | 86 | Luzerne County |
| Damascus Area School | PA2640390 | NTNCWS | Honesdale | 350 | Wayne County |
| Danville Child Development Ctr | PA4470314 | NTNCWS | Danville | 40 | Montour County |
| Danzer Veneer | PA5040846 | NTNCWS | Darlington | 150 | Beaver County |
| Darling Ingredients Inc | PA7360617 | NTNCWS | East Earl | 80 | Lancaster County |
| Darlington Township | PA5040334 | NTNCWS | Darlington | 75 | Beaver County |
| Darway Healthcare & Rehab | PA2570001 | CWS | Forksville | 100 | Sullivan County |
| Dassa Mckinney Elem School | PA5100316 | NTNCWS | West Sunbury | 650 | Butler County |
| Dauphin Co Conservation Dist | PA7220918 | NTNCWS | Dauphin | 30 | Dauphin County |
| Davids Community Bible Church | PA7220843 | NTNCWS | Millersburg | 73 | Dauphin County |
| Davis Estates | PA6250804 | CWS | Fairview | 50 | Erie County |
| Dayton Muni Water Dept | PA5030002 | CWS | Dayton | 600 | Armstrong County |
| Dcnr Quehanna Facility | PA6170345 | NTNCWS | Penfield | 50 | Clearfield County |
| Ddlc Corporation | PA7500839 | NTNCWS | Shermans Dale | 100 | Perry County |
| Dean Twp Water System | PA4110042 | CWS | Dysart | 216 | Blair County, Cambria County |
| Deann Village Mhp | PA7220004 | CWS | Dundee | 135 | Dauphin County |
| Deer Chase Mhp | PA7500029 | CWS | Landisburg | 84 | Perry County |
| Deer Lake Citizens Assoc | PA3540036 | CWS | Orwigsburg | 380 | Schuylkill County |
| Deer Park Lumber | PA2660968 | NTNCWS | Tunkhannock | 75 | Wyoming County |
| Deer Run Mobile Home Park | PA2450018 | CWS | Dingmans Ferry | 54 | Monroe County |
| Deerfield Village Mhp | PA7670040 | CWS | Holtwood | 81 | York County |
| Deerhaven White Beauty View Es | PA2520110 | CWS | Honesdale | 53 | Pike County |
| Defiance Water Assn | PA4050024 | CWS | Defiance | 205 | Bedford County |
| Del-Aire Mobile Home Park | PA3480007 | CWS | Elmwood Park | 33 | Northampton County |
| Delaware Plaza | PA2521096 | NTNCWS | Decatur | 107 | Pike County |
| Delaware Water Gap Boro | PA2450022 | CWS | Delaware Water Gap | 850 | Monroe County |
| Delmar Meadows Mhc | PA2590041 | CWS | Fleetwood | 64 | Tioga County |
| Delta Boro Water Sys | PA7670070 | CWS | Delta | 1,400 | York County |
| Demorgan Acres Mhp | PA2080002 | CWS | Troy | 90 | Bradford County |
| Denny Ridge Mobile Home Park | PA6200037 | CWS | Adamsville | 60 | Crawford County |
| Desales University | PA3390093 | CWS | Center Valley | 2,000 | Lehigh County |
| Desotec Us Llc Darlington | PA5040852 | NTNCWS | Darlington | 45 | Beaver County |
| Devereux Pocono Center | PA2640014 | CWS | Newfoundland | 115 | Wayne County |
| Devon Creek Development | PA7360131 | CWS | Lancaster | 100 | Lancaster County |
| Dew Fresh Inc | PA3061252 | NTNCWS | Temple | 150 | Berks County |
| Diakon Wilderness Center | PA7211021 | NTNCWS | Boiling Springs | 80 | Cumberland County |
| Dickinson Twp Munic Auth | PA7210055 | CWS | Mount Holly Springs | 250 | Cumberland County |
| Dieffenbach Bethel Facility | PA3061259 | NTNCWS | Womelsdorf | 29 | Berks County |
| Dieffenbachs Potato Chips | PA3061233 | NTNCWS | Womelsdorf | 70 | Berks County |
| Diehl Automotive Of Grove City | PA6430897 | NTNCWS | Grove City | 50 | Mercer County |
| Discovery Kids Childcare Cntr | PA7220461 | NTNCWS | Middletown | 130 | Dauphin County |
| Dock Woods Community | PA1460010 | CWS | Lansdale | 72 | Bucks County, Montgomery County |
| Doe Run Mobile Home Park | PA1150224 | CWS | Unionville | 29 | Chester County |
| Donegal Township | PA5630068 | CWS | West Alexander | 820 | Washington County |
| Dover Boro Water Sys | PA7670072 | CWS | Dover | 1,900 | York County |
| Driftwood Borough | PA6120001 | CWS | Driftwood | 258 | Cameron County |
| Driftwood Court | PA3480011 | CWS | Easton | 53 | Northampton County |
| Drumore Mhp | PA7360019 | CWS | Coatesville | 40 | Lancaster County |
| Dry Run Water Assn | PA7280033 | CWS | Dry Run | 278 | Franklin County |
| Dtac | PA4410872 | NTNCWS | S Williamsport | 48 | Lycoming County |
| Dte Energy | PA2580601 | NTNCWS | New Milford | 50 | Susquehanna County |
| Dtma Cedar Crest Farms | PA1090158 | CWS | Doylestown | 300 | Bucks County, Montgomery County |
| Dublin Acres Homeowners Assoc | PA1090106 | CWS | Dublin | 175 | Bucks County |
| Dubois Regional Airport | PA6330809 | NTNCWS | Reynoldsville | 250 | Jefferson County |
| Ducklings Daycare | PA1150319 | NTNCWS | Kennett Square | 130 | Chester County |
| Dudley Carbon Coalmont Jm Auth | PA4310011 | CWS | Dudley | 403 | Huntingdon County |
| Duncan Twp Municipal Authority | PA2590048 | CWS | Wellsboro | 220 | Tioga County |
| Duncannon Muni Water | PA7500019 | CWS | Duncannon | 2,000 | Dauphin County, Perry County |
| Duncansville Mhp Llc | PA4070013 | CWS | Cedaredge | 250 | Blair County |
| Duncansville Muni Water Auth | PA4070012 | CWS | Duncansville | 2,350 | Blair County |
| Dunkard Brethren Ch Sch | PA3060832 | NTNCWS | Bethel | 83 | Berks County |
| Duquesne Club | PA5020886 | NTNCWS | Pittsburgh | 210 | Allegheny County |
| Durham Nock Elem School | PA1091297 | NTNCWS | Kintnersville | 336 | Bucks County |
| Durham Quarters Apts | PA1090044 | CWS | Pipersville | 25 | Bucks County |
| Dushore Water Authority | PA2570003 | CWS | Dushore | 400 | Sullivan County |
| Dutch Marketplace | PA7360324 | NTNCWS | Gordonville | 30 | Lancaster County |
| Dutch Mobilehome Park | PA7360038 | CWS | Ephrata | 45 | Lancaster County |
| Dutch Valley Food Distributors | PA3061138 | NTNCWS | Myerstown | 174 | Berks County |
| Dutchs Market | PA2520522 | NTNCWS | Greentown | 455 | Pike County |
| Dutchway Farmers Mkt | PA7361072 | NTNCWS | Gap | 200 | Lancaster County |
| Dvsd Dingman Delaware Campus | PA2520862 | NTNCWS | Milford | 1,965 | Pike County |
| Dvsd School Complex | PA2520333 | NTNCWS | Milford | 2,197 | Pike County |
| Dvsd Shohola Elementary School | PA2520960 | NTNCWS | Milford | 484 | Pike County |
| Dwgnra Headquarters | PA2450745 | NTNCWS | Bushkill | 65 | Monroe County |
| Dymonds Mhp | PA2660024 | CWS | Tunkhannock | 76 | Wyoming County |
| E Bangor Mun Authority | PA3480049 | CWS | East Bangor | 800 | Northampton County |
| E Greenville Boro Water Dept | PA1460023 | CWS | East Greenville | 3,100 | Montgomery County |
| E J Gulick Mhp | PA5100062 | CWS | Easton | 78 | Butler County |
| E&Y Farm Apartments | PA3060129 | CWS | Kutztown | 135 | Berks County |
| Eagle Creek | PA4140129 | CWS | Bellefonte | 60 | Centre County |
| Eagle Crest Manor Mhp | PA6200074 | CWS | Meadville | 71 | Crawford County |
| Eagle Metals | PA3060882 | NTNCWS | Leesport | 45 | Berks County |
| Eagle Ridge Personal Care Home | PA4180071 | CWS | Mill Hall | 37 | Clinton County |
| Eagle River Homes | PA7360872 | NTNCWS | Leola | 90 | Lancaster County |
| Eagle View Mhp | PA7010055 | CWS | Scottsdale | 230 | Adams County |
| Early Learning Connections | PA5100412 | NTNCWS | Butler | 140 | Butler County |
| Earthres | PA1090300 | NTNCWS | Pipersville | 81 | Bucks County |
| East Berlin Area Joint Auth | PA7010003 | CWS | East Berlin | 1,750 | Adams County |
| East Brady Water System | PA6160003 | CWS | East Brady | 1,040 | Clarion County |
| East Deer Twp Water Dept | PA5020013 | CWS | Creighton | 2,000 | Allegheny County |
| East Fallowfield Elem School | PA1150836 | NTNCWS | Thorndale | 380 | Chester County |
| East Hanover Elem Sch | PA7220387 | NTNCWS | Hummelstown | 440 | Dauphin County |
| East Juniata High Sch | PA4340311 | NTNCWS | Mifflintown | 680 | Juniata County |
| East Sharpsburg Water Assn | PA4070033 | CWS | Roaring Spring | 95 | Blair County |
| East Springfield Elem School | PA6250307 | NTNCWS | Albion | 240 | Erie County |
| East Swamp Church | PA1090882 | NTNCWS | Quakertown | 80 | Bucks County |
| East Taylor Muni Auth | PA4110043 | CWS | Johnstown | 3,152 | Cambria County |
| Eastbrook Apartments | PA6370049 | CWS | New Castle | 75 | Lawrence County |
| Eastern Cumberland Water Sys | PA7010044 | CWS | York | 150 | Adams County |
| Easton Area Sd Admin Bldg | PA3480859 | NTNCWS | Easton | 95 | Northampton County |
| Eastville Water Association | PA4180050 | CWS | Loganton | 75 | Clinton County |
| Easy Does It | PA3061128 | NTNCWS | Leesport | 58 | Berks County |
| Eaton Sewer & Water Co | PA2660039 | CWS | Nicholson | 3,100 | Wyoming County |
| Echo Beach Mhp | PA2080017 | CWS | Towanda | 43 | Bradford County |
| Echo Valley Estates | PA2400003 | CWS | Shavertown | 490 | Luzerne County |
| Echo Valley Mhp | PA1150065 | CWS | North East | 60 | Chester County |
| Ecs Amsa 103 | PA6201170 | NTNCWS | Fairview | 60 | Crawford County |
| Eden Glen Village | PA7360110 | CWS | Strasburg | 80 | Lancaster County |
| Edenville Water Assn Inc | PA7280046 | CWS | Chambersburg | 491 | Franklin County |
| Edgewood At Countryside Apts | PA2450089 | CWS | Mount Pocono | 80 | Monroe County |
| Edgewood Mobile Home Park | PA2350054 | CWS | Trout Run | 117 | Lackawanna County |
| Edinboro Mh Village South | PA6250018 | CWS | Edinboro | 60 | Erie County |
| Edwards Mobile Home Park | PA6250014 | CWS | West Springfield | 90 | Erie County |
| Egts Inc Leidy Station | PA4180031 | NTNCWS | Renovo | 50 | Clinton County |
| Egts Inc Sabinsville Office | PA2590304 | NTNCWS | Westfield | 60 | Tioga County |
| Eisenhower Elemen Middle Hs | PA6620323 | NTNCWS | Russell | 835 | Warren County |
| Eisenhower Water Supply | PA7010048 | CWS | Gettysburg | 760 | Adams County |
| Elderberry Mhp | PA6200078 | CWS | Conneaut Lake | 60 | Crawford County |
| Eldred Borough Water Auth | PA6420016 | CWS | Eldred | 850 | McKean County |
| Eldred Twp Munic Auth | PA6330840 | CWS | Sigel | 700 | Jefferson County |
| Elizabethville Area Auth | PA7220003 | CWS | Elizabethville | 2,700 | Dauphin County |
| Elk Lake Elementary School | PA2580513 | NTNCWS | Springville | 850 | Susquehanna County |
| Elk Lake High School | PA2580800 | NTNCWS | Springville | 800 | Susquehanna County |
| Elk Meadows | PA2580042 | CWS | Union Dale | 96 | Susquehanna County |
| Elkland Boro Water Authority | PA2590035 | CWS | Elkland | 2,660 | Tioga County |
| Ellwood National Forge Co | PA6620822 | NTNCWS | Irvine | 513 | Warren County |
| Ellwood Specialty Steel | PA6370917 | NTNCWS | New Castle | 50 | Lawrence County |
| Elmhurst Country Club | PA2350318 | NTNCWS | Moscow | 140 | Lackawanna County |
| Elverson Water Company | PA1150191 | CWS | Elverson | 1,641 | Chester County |
| Emery Cove Estates | PA2640008 | CWS | Red Hill | 48 | Wayne County |
| Emily Estates Subdiv | PA4310051 | CWS | Tyrone | 162 | Huntingdon County |
| Empire Mobile Home Park | PA4140092 | CWS | Bellefonte | 75 | Centre County |
| Engineered Materials Solutions | PA3060704 | NTNCWS | Hamburg | 76 | Berks County |
| Envigo Global Services Inc | PA7360550 | NTNCWS | Denver | 60 | Lancaster County |
| Environmental Stone Works | PA3540952 | NTNCWS | Orwigsburg | 60 | Schuylkill County |
| Esasd Mid Smithfield Elem Sch | PA2450491 | NTNCWS | East Stroudsburg | 881 | Monroe County |
| Esasd North Campus | PA2520508 | NTNCWS | East Stroudsburg | 3,175 | Pike County |
| Esasd Resica Elem Sch | PA2451228 | NTNCWS | East Stroudsburg | 800 | Monroe County |
| Estates At Hamilton Hills | PA2450076 | CWS | Saylorsburg | 84 | Monroe County |
| Estates At Stone Row | PA2450138 | CWS | East Stroudsburg | 48 | Monroe County |
| Evans City Borough | PA5100033 | CWS | Evans City | 1,990 | Butler County |
| Everett Area Sch Dist | PA4050870 | NTNCWS | Everett | 455 | Bedford County |
| Everett Boro Muni Auth | PA4050012 | CWS | Everett | 2,048 | Bedford County |
| Evergreen Community Charter | PA2451412 | NTNCWS | Cresco | 112 | Monroe County |
| Evergreen Mhc Llc | PA2400049 | CWS | Milford | 80 | Luzerne County |
| Evergreen Mobile Home Park | PA2350010 | CWS | Lake Ariel | 75 | Lackawanna County |
| Evergreen Village Mhp | PA3480076 | CWS | Camp Hill | 316 | Northampton County |
| Executive Center | PA1090332 | NTNCWS | Doylestown | 135 | Bucks County |
| Exeter Blakeslee Lot 100 | PA2451431 | NTNCWS | Radnor | 90 | Monroe County |
| Exeter Blakeslee Lot 100 | PA3130997 | NTNCWS | Radnor | 285 | Carbon County |
| Exeter Twp Sr Ctr & Apt Comple | PA2660334 | CWS | Falls | 50 | Wyoming County |
| Fair Winds | PA5100063 | CWS | Sarver | 182 | Armstrong County, Butler County |
| Fairfield Manor Mhp | PA5650098 | CWS | Pittsburgh | 92 | Westmoreland County |
| Fairfield Muni Auth | PA7010005 | CWS | Fairfield | 2,150 | Adams County |
| Fairhaven Christian School | PA7361104 | NTNCWS | Gap | 85 | Lancaster County |
| Fairland Elem Sch | PA7361067 | NTNCWS | Lancaster | 60 | Lancaster County |
| Fairmont Village | PA3390918 | NTNCWS | Bethlehem | 200 | Lehigh County |
| Fairmount Home | PA7360039 | CWS | Ephrata | 483 | Lancaster County |
| Faith Builders | PA6201182 | NTNCWS | Guys Mills | 200 | Crawford County |
| Faith Christian Academy | PA1091130 | NTNCWS | Quakertown | 647 | Bucks County |
| Faith Mennonite High Sch | PA7360561 | NTNCWS | Kinzers | 71 | Lancaster County |
| Falls Creek Boro Mun Auth | PA6330007 | CWS | Falls Creek | 1,440 | Jefferson County |
| Family And Friends | PA1090055 | CWS | Point Pleasant | 40 | Bucks County, Montgomery County |
| Farmersville Mennonite School | PA7360780 | NTNCWS | Ephrata | 90 | Lancaster County |
| Fawn Area Elem Sch | PA7671290 | NTNCWS | Fawn Grove | 320 | York County |
| Fawn Valley South & North | PA2450009 | CWS | Saylorsburg | 100 | Monroe County |
| Federal Corr Institute Loretto | PA4110067 | CWS | Cresson | 1,500 | Cambria County |
| Fedex Auburn | PA3540973 | NTNCWS | Auburn | 50 | Schuylkill County |
| Fedex Erie Facility | PA6251005 | NTNCWS | Fairview | 150 | Erie County |
| Fedex Freight East | PA2450314 | NTNCWS | Harrison | 232 | Monroe County |
| Fentons Corner | PA1090165 | CWS | Buckingham | 25 | Bucks County |
| Finch Hill Water Co | PA2350062 | CWS | Greenfield Township | 150 | Lackawanna County |
| Fisher & Fisher Law Office Bld | PA2451442 | NTNCWS | Kresgeville | 40 | Monroe County |
| Flying J Travel Plaza | PA2580890 | NTNCWS | Knoxville | 450 | Susquehanna County |
| Foley Cat | PA3390545 | NTNCWS | Breinigsville | 35 | Lehigh County |
| Forbes Rd School District | PA4290344 | NTNCWS | Waterfall | 475 | Fulton County |
| Ford City Muni Water Works | PA5030005 | CWS | Ford City | 2,991 | Armstrong County |
| Forest Area Schools | PA6270834 | NTNCWS | Tionesta | 300 | Forest County |
| Forest Brook Mhp | PA5040048 | CWS | Durham | 200 | Beaver County |
| Forest Green Estates | PA6200067 | CWS | Chestnut Rdg | 225 | Crawford County |
| Forest Hills Pch | PA4110028 | CWS | Sidman | 40 | Cambria County, Somerset County |
| Forrest Brooke Mhp | PA6430062 | CWS | Oak Brook | 491 | Mercer County |
| Fort Indiantown Gap | PA7380044 | CWS | Annville | 3,100 | Lebanon County |
| Fort Washington Elem School | PA1460467 | NTNCWS | Maple Glen | 532 | Montgomery County |
| Foundations Christian Academy | PA4050417 | NTNCWS | Everett | 40 | Bedford County |
| Four Seasons Estates Mhp | PA2400031 | CWS | Mountain Top | 98 | Luzerne County |
| Fox Glen Gardens | PA2450092 | CWS | Olyphant | 95 | Monroe County |
| Fox Group Office Complex | PA2451082 | NTNCWS | East Stroudsburg | 33 | Monroe County |
| Foxburg Area Water & Sewer Aut | PA6160004 | CWS | Foxburg | 925 | Clarion County |
| Fr Mehoopany Warehouse | PA2660960 | NTNCWS | Mehoopany | 150 | Wyoming County |
| Franklin Mobile Home Village | PA5100104 | CWS | Durham | 80 | Butler County |
| Franklin Twp Muni Auth | PA7010032 | CWS | Cashtown | 441 | Adams County |
| Franklintown Boro Muni Auth | PA7670113 | CWS | Franklintown | 705 | York County |
| Frederick Living | PA1460075 | CWS | Zieglerville | 640 | Montgomery County |
| Fredericksburg Water Assn | PA4070031 | CWS | Martinsburg | 300 | Blair County |
| Fredericksburg Water Auth | PA7380035 | CWS | Fredericksburg | 1,200 | Lebanon County |
| Fredonia Boro | PA6430036 | CWS | Fredonia | 443 | Mercer County |
| Free Grace Bic Church | PA7220845 | NTNCWS | Millersburg | 150 | Dauphin County |
| Freeburg Municipal Authority | PA4550013 | CWS | Freeburg | 685 | Snyder County |
| Freedom Twp Water & Sewer | PA4070034 | CWS | East Freedom | 1,400 | Blair County |
| Freedom Valley Worship Ctr | PA7010958 | NTNCWS | Gettysburg | 500 | Adams County |
| Freemans Mhp | PA2660037 | CWS | Monroe Twp | 83 | Wyoming County |
| Freemansburg Mhc | PA3480012 | CWS | Berwyn | 90 | Northampton County |
| Frelighs Whispering Pines Mhp | PA6250097 | CWS | Fairview | 42 | Erie County |
| Frieden Manor Mhp | PA3540043 | CWS | Morgantown | 350 | Schuylkill County |
| Friendship Elem Sch | PA7671292 | NTNCWS | Glen Rock | 625 | York County |
| Fritzingertown Sr Liv Comm #1 | PA2400116 | CWS | Drums | 66 | Luzerne County |
| Fritzingertown Sr Liv Comm #2 | PA2400139 | CWS | Drums | 118 | Luzerne County |
| Frosty Mountain Plaza | PA3130952 | NTNCWS | Albrightsville | 175 | Carbon County |
| Fryburg Water Company | PA6160030 | CWS | Sharon | 490 | Clarion County |
| Galeton Borough Authority | PA6530010 | CWS | Galeton | 1,200 | Potter County |
| Gallitzin Boro Water Auth | PA4110011 | CWS | Gallitzin | 3,130 | Cambria County |
| Gap View Community Mhp | PA3480054 | CWS | Secaucus | 50 | Northampton County |
| Gap View Mobile Home Park | PA3480072 | CWS | Camp Hill | 72 | Northampton County |
| Garrett Boro Water Sys | PA4560035 | CWS | Garrett | 449 | Somerset County |
| Gateway Restaurant | PA4050358 | NTNCWS | Westlake | 165 | Bedford County |
| Gbg Seventh Day Adventist Ch | PA7010962 | NTNCWS | Gettysburg | 75 | Adams County |
| Gehman Mennonite School | PA7361066 | NTNCWS | Denver | 168 | Lancaster County |
| Geisinger Office Building 2 | PA4190876 | NTNCWS | Danville | 130 | Columbia County |
| Geisingers Mhp | PA3060005 | CWS | Barto | 84 | Berks County |
| General Mclane Schools | PA6250311 | NTNCWS | Edinboro | 2,000 | Erie County |
| Genesee Twp Water Authority | PA6530011 | CWS | Genesee | 450 | Potter County |
| Geochemical Testing | PA4560305 | NTNCWS | Somerset | 100 | Somerset County |
| George Ferrell Elementary | PA4410801 | NTNCWS | Hughesville | 180 | Lycoming County |
| Georgia Pacific Mt Jewett | PA6420389 | NTNCWS | Kane | 300 | McKean County |
| Gettysburg Montessori School | PA7010995 | NTNCWS | Gettysburg | 308 | Adams County |
| Getz Personal Care Home | PA2450079 | CWS | Kunkletown | 95 | Monroe County |
| Giannottis Plaza | PA3060616 | NTNCWS | Kutztown | 75 | Berks County |
| Gibsons Brighter Futures | PA6610884 | NTNCWS | Titusville | 40 | Venango County |
| Gilbert Mobile Home Park | PA2450027 | CWS | Lapeer | 150 | Monroe County |
| Gilbertsville Elementary | PA1460340 | NTNCWS | Boyertown | 800 | Montgomery County |
| Gillett Mhc | PA2080025 | CWS | Allentown | 100 | Bradford County |
| Gilpin Twp Muni Auth | PA5030010 | CWS | Leechburg | 1,680 | Armstrong County |
| Giorgi Farm 1 | PA3061192 | NTNCWS | Temple | 150 | Berks County |
| Giorgi Mushroom Farm 2 1To3 | PA3060407 | NTNCWS | Temple | 80 | Berks County |
| Giorgio Foods Inc | PA3060809 | NTNCWS | Temple | 250 | Berks County |
| Giorgio Fresh | PA3061189 | NTNCWS | Temple | 260 | Berks County |
| Girard State Police Station | PA6251016 | NTNCWS | State College | 34 | Erie County |
| Glades Pike Estates Mhp Llc | PA4560004 | CWS | Somerset | 180 | Somerset County |
| Glasgow Municipal Water Works | PA5040059 | CWS | Midland | 51 | Beaver County |
| Glen Campbell Water Works | PA5320016 | CWS | Glen Campbell | 260 | Indiana County |
| Glen Gery Inc | PA3060927 | NTNCWS | Shoemakersville | 100 | Berks County |
| Glen Lake Estates | PA6430014 | CWS | Durham | 94 | Mercer County |
| Glen Rock Water Auth | PA7670050 | CWS | Glen Rock | 2,000 | York County |
| Glencrest Mobile Home Park | PA3390020 | CWS | Northampton | 570 | Lehigh County |
| Glendorn Lodge | PA6420845 | NTNCWS | Bradford | 75 | McKean County |
| Glenwood Mobilehome Park | PA7360048 | CWS | Mohnton | 40 | Lancaster County |
| Gluco Lodge | PA2450088 | CWS | Stroudsburg | 65 | Monroe County |
| Goddard Early Learning Center | PA1150703 | NTNCWS | West Chester | 50 | Chester County |
| Goddard School | PA3390303 | NTNCWS | Breinigsville | 130 | Lehigh County |
| Godshalls Quality Meats Inc | PA1460461 | NTNCWS | Souderton | 175 | Montgomery County |
| Goldsboro Boro Water Co | PA7670131 | CWS | Etters | 475 | York County |
| Goods Store | PA7360553 | NTNCWS | East Earl | 900 | Lancaster County |
| Goodwill Christian Day Sch | PA4340308 | NTNCWS | Thompsontown | 61 | Juniata County |
| Gov Mifflin Brecknock Elem Sch | PA3060347 | NTNCWS | Shillington | 480 | Berks County |
| Gpg Learning Academy | PA7010314 | NTNCWS | Fairfield | 136 | Adams County |
| Grace Assembly Of God Church | PA1150639 | NTNCWS | Spring City | 75 | Chester County |
| Grace Ridge Church | PA2640530 | NTNCWS | Honesdale | 72 | Wayne County |
| Gracious Living Estates Pch | PA2580046 | CWS | Montrose | 77 | Susquehanna County |
| Grampas Woods Estates | PA2520005 | CWS | Tafton | 45 | Pike County |
| Grampian Boro Penn Twp Ma | PA6170021 | CWS | Grampian | 1,400 | Clearfield County |
| Grand View Hospital | PA1090862 | NTNCWS | Sellersville | 1,880 | Bucks County |
| Grandview Acres Mhp | PA6430042 | CWS | West Middlesex | 70 | Mercer County |
| Grantville Mhp | PA7220057 | CWS | Farmington Hills | 1,040 | Dauphin County |
| Gratz Boro Water Revenue Fund | PA7220005 | CWS | Gratz | 738 | Dauphin County |
| Gravel Hill Umc Christian | PA7380446 | NTNCWS | Palmyra | 225 | Lebanon County |
| Gray Area Watr Auth Of Jen Twp | PA4560036 | CWS | Gray | 700 | Somerset County |
| Great Dane Limited Partnership | PA4470826 | NTNCWS | Danville | 250 | Montour County |
| Greater Johnstown Wa Saltlick | PA4110014 | CWS | Johnstown | 170 | Cambria County, Somerset County |
| Greater Leb Refuse Auth | PA7380434 | NTNCWS | Lebanon | 30 | Lebanon County |
| Green Acres Mhc | PA3390090 | CWS | Durham | 1,475 | Lehigh County |
| Green Acres Mhp | PA3060042 | CWS | Kutztown | 47 | Berks County |
| Green Acres Mobile Home Park | PA3480006 | CWS | Easton | 48 | Northampton County |
| Green Acres Park | PA7380018 | CWS | Banner Elk | 280 | Lebanon County |
| Green Grove Trailer Ct | PA7280010 | CWS | Greencastle | 75 | Franklin County |
| Green Hill Mhp | PA1460027 | CWS | Morgantown | 323 | Montgomery County |
| Green Mountain Estates | PA2450087 | CWS | Camp Hill | 108 | Monroe County |
| Green Park Middle School | PA7500308 | NTNCWS | Elliottsburg | 550 | Perry County |
| Green Ridge Elem Sch | PA7210304 | NTNCWS | Mechanicsburg | 425 | Cumberland County |
| Green Township Ma Cookport | PA5320029 | CWS | Commodore | 250 | Indiana County |
| Green Twp Mun Auth Barr Slope | PA5320010 | CWS | Commodore | 285 | Indiana County |
| Green Twp Mun Auth-Commodore | PA5320011 | CWS | Commodore | 350 | Indiana County |
| Greenburr Water Association | PA4180051 | CWS | Loganton | 115 | Clinton County |
| Greene Twp Office Building | PA6250321 | NTNCWS | Erie | 25 | Erie County |
| Greenfield Acres Mhp | PA2350063 | CWS | Greenfield Township | 48 | Lackawanna County |
| Greenfield Twp Muni Auth | PA4070058 | CWS | Claysburg | 2,500 | Blair County |
| Greentop Mobile Home Park | PA1090060 | CWS | Morgantown | 120 | Bucks County |
| Greenville Mhp | PA6430039 | CWS | Mercer | 150 | Mercer County |
| Greenwich Twp Elem Sch | PA3060352 | NTNCWS | Kutztown | 196 | Berks County |
| Greenwood Friends School | PA4190812 | NTNCWS | Orangeville | 80 | Columbia County |
| Gregg Township Water Authority | PA4140107 | CWS | Spring Mills | 670 | Centre County |
| Greiner Industries Inc | PA7360778 | NTNCWS | Mount Joy | 200 | Lancaster County |
| Gretna Springs | PA7380045 | CWS | Manheim | 405 | Lebanon County |
| Greystone Country Estates | PA6430073 | CWS | Fredonia | 55 | Mercer County |
| Grier School | PA4310022 | CWS | Tyrone | 450 | Huntingdon County |
| Grims Mobile Home Court | PA3390036 | CWS | New Tripoli | 40 | Lehigh County |
| Groffdale Mobilehome Park | PA7360098 | CWS | Lancaster | 98 | Lancaster County |
| Groninger Farms Arch Rock | PA4340005 | CWS | Mexico | 175 | Juniata County |
| Grove Worldwide Us Llc | PA7280330 | NTNCWS | Shady Grove | 1,800 | Franklin County |
| Growing Years Childcare Ctr | PA2400989 | NTNCWS | Conyngham | 87 | Luzerne County |
| Guers Dairy | PA3540447 | NTNCWS | Pottsville | 50 | Schuylkill County |
| Gutchess Brookville | PA6330352 | NTNCWS | Cortland | 70 | Jefferson County |
| Guy Chemical | PA4560342 | NTNCWS | Somerset | 90 | Somerset County |
| Guys Mills Mutual Water Assoc | PA6200062 | CWS | Guys Mills | 99 | Crawford County |
| H&J Plaza | PA2451152 | NTNCWS | Brodheadsville | 62 | Monroe County |
| Hahnstown Mennonite School | PA7360705 | NTNCWS | Ephrata | 100 | Lancaster County |
| Hain Pure Protein Corp | PA7380379 | NTNCWS | Fredericksburg | 210 | Lebanon County |
| Haines Aaronsburg Mun Auth | PA4140108 | CWS | Aaronsburg | 550 | Centre County |
| Haines Woodward Municipal Auth | PA4140094 | CWS | Woodward | 140 | Centre County |
| Halfmoon Water Association | PA4140123 | CWS | Philipsburg | 300 | Centre County |
| Halifax Area Water & Sewer Aut | PA7220040 | CWS | Halifax | 2,278 | Dauphin County |
| Halifax Village | PA7220009 | CWS | Gap | 272 | Dauphin County |
| Hamilton Twp Elementary School | PA2450412 | NTNCWS | Stroudsburg | 450 | Monroe County |
| Hamilton Twp Mun Auth | PA2590049 | CWS | Morris Run | 400 | Tioga County |
| Hamlin Water Company | PA2640044 | CWS | Hamlin | 400 | Wayne County |
| Hanover Commons | PA1090324 | NTNCWS | Perkasie | 75 | Bucks County |
| Hanover Township Lehigh County | PA3390097 | CWS | Allentown | 520 | Lehigh County |
| Hansons Landing Mhp | PA2400039 | CWS | Milton | 86 | Luzerne County |
| Happy Acres Development | PA2350039 | CWS | Honesdale | 168 | Lackawanna County |
| Happy Hearts Senior Living | PA5100802 | NTNCWS | Clairton | 29 | Butler County |
| Happy Hollow | PA2520100 | CWS | Shohola | 89 | Pike County |
| Hardwood Estates | PA6200010 | CWS | Conneaut Lake | 61 | Crawford County |
| Harford Muni Auth Water System | PA2580027 | CWS | Harford | 100 | Susquehanna County |
| Harman Stove Company | PA7220503 | NTNCWS | Halifax | 160 | Dauphin County |
| Harmar Twp Muni Auth | PA5020009 | CWS | Cheswick | 3,200 | Allegheny County |
| Harmony Area Schools | PA6170307 | NTNCWS | Westover | 360 | Clearfield County |
| Harmony Estates Mhp | PA7210003 | CWS | Morgantown | 80 | Cumberland County |
| Harrisburg Christian Sch | PA7220941 | NTNCWS | Harrisburg | 450 | Dauphin County |
| Harrisburg Intl Airport | PA7220044 | NTNCWS | Middletown | 1,500 | Dauphin County |
| Harrow Station | PA1090348 | NTNCWS | Kintnersville | 100 | Bucks County |
| Harsco Minerals Pa | PA5101026 | NTNCWS | Sarver | 47 | Butler County |
| Harshbarger Mhp | PA5040002 | CWS | Durham | 90 | Beaver County |
| Hartslog Courts | PA4310298 | CWS | Landisburg | 90 | Huntingdon County |
| Hartzell Mobilehome Park | PA6160020 | CWS | Tionesta | 80 | Clarion County |
| Harvest Moon Trailer Court | PA4410030 | CWS | Linden | 360 | Lycoming County |
| Harvey Patterson Creek Portal | PA5300305 | NTNCWS | Canonsburg | 500 | Greene County |
| Hatfield Quality Meats Inc | PA1461183 | NTNCWS | Hatfield | 1,850 | Montgomery County |
| Hawk Valley Village | PA7360016 | CWS | Lancaster | 250 | Lancaster County |
| Hawthorn Redbank Redbank Ma | PA6160026 | CWS | Hawthorn | 1,500 | Armstrong County, Clarion County |
| Hazel Hurst Water Company | PA6420017 | CWS | Hazel Hurst | 140 | McKean County |
| Hazle Park Packing | PA2400919 | NTNCWS | Hazle Twp | 30 | Luzerne County |
| Hca Delano Park Place | PA2408007 | CWS | Hazleton | 1,017 | Schuylkill County |
| Hca Derringer Fern Glen | PA2408012 | CWS | Hazleton | 275 | Luzerne County |
| Hca Tomhicken | PA2408011 | CWS | Hazleton | 125 | Luzerne County |
| Heatherbrooke Estates | PA4410005 | CWS | Muncy | 410 | Lycoming County |
| Heidelberg Acres Mhp | PA3390011 | CWS | Northampton | 90 | Lehigh County |
| Heidelberg Twp Muni Auth | PA7380033 | CWS | Schaefferstown | 975 | Lebanon County |
| Heidelberg Water Coop Corp | PA7670051 | CWS | Spring Grove | 90 | York County |
| Hellers Mobile Home Park | PA4190286 | CWS | Berwick | 21 | Columbia County |
| Helping Hands, Inc. | PA1460341 | NTNCWS | Bechtelsville | 70 | Montgomery County |
| Hemlock Acres Court | PA7360157 | CWS | Manheim | 125 | Lancaster County |
| Hemlock Point | PA2521010 | NTNCWS | Greentown | 125 | Monroe County, Pike County |
| Hemlock Village Mhp | PA6430072 | CWS | Erie | 45 | Mercer County |
| Henderson Township Mun Auth | PA6330014 | CWS | Stump Creek | 354 | Jefferson County |
| Henrietta Mutual Water Assn | PA4070026 | CWS | Martinsburg | 165 | Blair County |
| Hepburn Lycoming Elem School | PA4410867 | NTNCWS | Williamsport | 450 | Lycoming County |
| Herbrucks Of Pa | PA7280306 | NTNCWS | Mercersburg | 100 | Franklin County |
| Hereford Est Mhp | PA3060037 | CWS | Norristown | 710 | Berks County |
| Heritage Est Mobile Homes | PA7360166 | CWS | Camp Hill | 330 | Lancaster County |
| Heritage Hill Estate | PA3060065 | CWS | Womelsdorf | 90 | Berks County |
| Heritage Hills Mhp | PA6370041 | CWS | Oakdale | 425 | Lawrence County |
| Heritage Hills Retirement Comm | PA7280066 | CWS | Greencastle | 57 | Franklin County |
| Heritage Valley Health System | PA5040437 | NTNCWS | Beaver | 1,200 | Beaver County |
| Heritage Valley Sewickley | PA5020959 | NTNCWS | Sewickley | 750 | Allegheny County |
| Heritage Village Mhp | PA3480089 | CWS | Morgantown | 400 | Northampton County |
| Herndon Boro Jackson Twp Jma | PA4490020 | CWS | Herndon | 432 | Northumberland County |
| Herr Foods | PA1150706 | NTNCWS | Nottingham | 400 | Chester County |
| Hershey Estates & Storage | PA7380029 | CWS | Morgantown | 293 | Lebanon County |
| Hershey Farm Restaurant | PA7360439 | NTNCWS | Ronks | 75 | Lancaster County |
| Hi Land Mhp | PA7220025 | CWS | Elizabethtown | 66 | Dauphin County |
| Hi View Mobile Home Park | PA2350043 | CWS | Elizabethtown | 97 | Lackawanna County |
| Hickory Farm Mhp | PA3060112 | CWS | Lititz | 70 | Berks County |
| Hickory Hill Country Village | PA6250067 | CWS | Girard | 375 | Erie County |
| Hickory Run Energy | PA6370975 | NTNCWS | New Castle | 25 | Lawrence County |
| Hickory Run Service Plaza | PA3130819 | NTNCWS | Glen Rock | 350 | Carbon County |
| Hidden Valley Mobile Home Ct | PA4410160 | CWS | Linden | 60 | Lycoming County |
| Hidden Valley Resort Lp | PA4560049 | CWS | Hidden Valley | 750 | Somerset County |
| Hidden View Estates | PA4140048 | CWS | Spring Mills | 57 | Centre County |
| Hideaway Mobile Home Park | PA1150049 | CWS | Gap | 95 | Chester County |
| High Point Baptist Academy | PA3061029 | NTNCWS | Geigertown | 282 | Berks County |
| Highland Court | PA1150070 | CWS | Parkesburg | 54 | Chester County |
| Highland Est Mhp | PA3060043 | CWS | Kutztown | 1,050 | Berks County |
| Highland S & W Auth Lloydell | PA4110015 | CWS | Johnstown | 723 | Cambria County |
| Highland S&W Auth Northern End | PA4110016 | CWS | Johnstown | 463 | Cambria County, Somerset County |
| Highland Twp Municipal Auth | PA6240006 | CWS | James City | 286 | Elk County |
| Highpoint Tool & Machine | PA6201251 | NTNCWS | Saegertown | 38 | Crawford County |
| Hillandale Gettysburg Site 1 | PA7011003 | NTNCWS | Gettysburg | 26 | Adams County |
| Hillandale Gettysburg Site 2 | PA7011004 | NTNCWS | Gettysburg | 45 | Adams County |
| Hillandale Gettysburg Site 3 | PA7010932 | NTNCWS | Gettysburg | 28 | Adams County |
| Hillandale Site 5 | PA7011005 | NTNCWS | Gettysburg | 26 | Adams County |
| Hillcrest Communities Lp | PA4070045 | CWS | Pheonixville | 350 | Blair County |
| Hillendale-On-The-Delaware | PA3480026 | CWS | Martins Creek | 150 | Northampton County |
| Hillsdale Mennonite Church | PA5320903 | NTNCWS | Clymer | 259 | Indiana County |
| Hillsdale Nursing And Rehab | PA5320017 | CWS | Hillsdale | 100 | Indiana County |
| Hillside Condominiums | PA2400142 | CWS | Dallas | 65 | Luzerne County |
| Hillside Manor Apts | PA7500025 | CWS | Mexico | 144 | Perry County |
| Hillside Mhp | PA7210022 | CWS | Spring Grove | 54 | Cumberland County |
| Hillside Mobile Home Park | PA2350014 | CWS | Bullville | 99 | Lackawanna County |
| Hillside Rest Home Inc | PA7010006 | CWS | Blue Ridge Summit | 58 | Adams County |
| Hillside Terrace Mhp | PA4050009 | CWS | Willow Street | 240 | Bedford County |
| Hillside View Mhp | PA2590013 | CWS | Gillett | 85 | Tioga County |
| Hilltop Acres Mhp | PA7360075 | CWS | Ramsey | 120 | Lancaster County |
| Hilltop Mobile Estates | PA1460038 | CWS | Royersford | 220 | Montgomery County |
| Hilltop Village Association | PA2640019 | CWS | Beach Lake | 86 | Wayne County |
| Himalayan Institute | PA2640057 | CWS | Honesdale | 124 | Wayne County |
| Hinkletown Mennonite School | PA7361101 | NTNCWS | Ephrata | 230 | Lancaster County |
| Hitching Post Assoc | PA2520048 | CWS | Greeley | 90 | Pike County |
| Hoffman Homes For Youths Inc | PA7010021 | CWS | Littlestown | 270 | Adams County |
| Hogan Learning Academy | PA3060342 | NTNCWS | Douglassville | 120 | Berks County |
| Holiday Inn Grantville | PA7220829 | NTNCWS | Grantville | 500 | Dauphin County |
| Hollister Heights Mhc | PA2640064 | CWS | Dingmans Ferry | 60 | Wayne County |
| Holly Acres Mhp | PA6250085 | CWS | Freehold | 315 | Erie County |
| Holtwood Mobile Home Park | PA7360057 | CWS | Elizabethtown | 196 | Lancaster County |
| Homeroom Commons Apartments | PA7360081 | CWS | Myerstown | 34 | Berks County, Lancaster County |
| Honey Brook Boro Water | PA1150127 | CWS | Honey Brook | 2,892 | Chester County |
| Hooversville Boro | PA4560037 | CWS | Hooversville | 645 | Somerset County |
| Hope Christian School | PA7380431 | NTNCWS | Myerstown | 85 | Lebanon County |
| Hope United Presbyterian Churc | PA7220361 | NTNCWS | Dauphin | 97 | Dauphin County |
| Hopewell United Methodist Ch | PA1150313 | NTNCWS | Downingtown | 200 | Chester County |
| Horsham Clinic | PA1461163 | NTNCWS | Ambler | 488 | Montgomery County |
| Houston Run Community | PA7360183 | CWS | York | 50 | Lancaster County |
| Howard Industries | PA6250968 | NTNCWS | Fairview | 37 | Erie County |
| Huefner Spring Water | PA6160039 | CWS | Lucinda | 300 | Clarion County |
| Hughesville Borough Water Auth | PA4410178 | CWS | Hughesville | 2,800 | Lycoming County |
| Hulmeville Municipal Authority | PA1090140 | CWS | Hulmeville | 750 | Bucks County |
| Human Resources Center | PA2640354 | NTNCWS | Honesdale | 150 | Wayne County |
| Hunterstown Generation Llc | PA7010961 | NTNCWS | Gettysburg | 30 | Adams County |
| Huntingdon Christian Acad | PA4310333 | NTNCWS | Huntingdon | 55 | Huntingdon County |
| Huspp 180 First Ave | PA2350363 | NTNCWS | Washington | 100 | Lackawanna County, Wayne County |
| Huston Twp Muni Auth | PA6170024 | CWS | Penfield | 960 | Clearfield County |
| Hy Vue Acres Mhp | PA5100016 | CWS | Durham | 62 | Butler County |
| Hyde Park Condo Association | PA1090377 | NTNCWS | Doylestown | 200 | Bucks County |
| Hydetown Elementary School | PA6200964 | NTNCWS | Titusville | 250 | Crawford County |
| Hydetown Park East | PA6200020 | CWS | White Hall | 29 | Crawford County |
| Hydetown Park West | PA6200052 | CWS | White Hall | 26 | Crawford County |
| Hydro Pac Mfg | PA6250880 | NTNCWS | Fairview | 46 | Erie County |
| Hyland Mhp | PA2400068 | CWS | East Greenville | 75 | Luzerne County |
| Hyland Mobile Home Park | PA6370015 | CWS | Grove City | 56 | Lawrence County |
| Hyndman Boro Water Dept | PA4050003 | CWS | Hyndman | 910 | Bedford County |
| I 81 Commerce Park | PA7211020 | NTNCWS | Miami | 500 | Cumberland County |
| Icmsa Pine Township | PA5320042 | CWS | Indiana | 1,932 | Indiana County |
| Icmsa Arcadia | PA5320041 | CWS | Indiana | 65 | Indiana County |
| Icmsa Cherry Tree | PA5320007 | CWS | Indiana | 375 | Indiana County |
| Icmsa Coy | PA5320048 | CWS | Indiana | 650 | Indiana County |
| Icmsa Lucerne | PA5320046 | CWS | Indiana | 625 | Indiana County |
| Icmsa Plumville | PA5320026 | CWS | Indiana | 883 | Indiana County |
| Icmsa Rossiter | PA5320034 | CWS | Indiana | 500 | Indiana County |
| Ilera Healthcare Fulton Cty | PA4290323 | NTNCWS | King Of Prussia | 250 | Fulton County |
| Ilsco Extrusions | PA6431090 | NTNCWS | Greenville | 175 | Mercer County |
| Imperial Mobile Home Park | PA1150013 | CWS | Morgantown | 151 | Chester County |
| Imperial Point Water Service | PA6250046 | CWS | Fairview | 1,500 | Erie County |
| Incredible Kid Academy | PA7011024 | NTNCWS | East Berlin | 60 | Adams County |
| Independence Elem Sch | PA5040389 | NTNCWS | Aliquippa | 300 | Beaver County |
| Independence Park | PA1150183 | CWS | Kirkwood | 91 | Chester County |
| Independence Park | PA5040019 | CWS | Morgantown | 225 | Beaver County |
| Indian Lake Boro Waterworks | PA4560025 | CWS | Central City | 1,246 | Somerset County |
| Indian Lake Camp Corp | PA7280055 | CWS | Fannettsburg | 125 | Franklin County |
| Indian Run Village Mhp | PA1150051 | CWS | Morgantown | 550 | Chester County |
| Indiana Wesleyan Sch | PA5320308 | NTNCWS | Dixonville | 35 | Indiana County |
| Industry Boro Muni Auth | PA5040036 | CWS | Industry | 1,865 | Beaver County |
| Innovo Detox | PA7010051 | NTNCWS | Towson | 70 | Adams County |
| International Waxes Farmersva | PA6420819 | NTNCWS | Smethport | 125 | McKean County |
| Intl Montessori Schools At Wc | PA1150384 | NTNCWS | West Chester | 62 | Chester County |
| Irish Creek Mhp | PA3060113 | CWS | Ellicott City | 90 | Berks County |
| Iron Bridge Inn | PA6430858 | NTNCWS | Mercer | 95 | Mercer County |
| Iron Mountain | PA5100807 | NTNCWS | Boyers | 2,000 | Butler County |
| Irvin Manheim Mhp | PA7360074 | CWS | Palmyra | 77 | Lancaster County |
| Irvona Municipal Authority | PA6170025 | CWS | Irvona | 1,980 | Clearfield County |
| J & A Mhp | PA7670003 | CWS | Manchester | 140 | York County |
| J Park Plaza | PA2451030 | NTNCWS | East Stroudsburg | 125 | Monroe County |
| Ja Reinhardt Co | PA2450426 | NTNCWS | Mountainhome | 94 | Monroe County |
| Jack & Jill Preschool | PA7380422 | NTNCWS | Lebanon | 98 | Lebanon County |
| Jack Frost Mtn Summit Lodge | PA3130307 | NTNCWS | Blakeslee | 900 | Carbon County |
| Jackson Commerce Park W S | PA6431042 | NTNCWS | Jackson Center | 75 | Mercer County |
| Jackson Mhp | PA2080027 | CWS | Landisburg | 300 | Bradford County |
| Jackson Penn Elem School | PA4550320 | NTNCWS | Selinsgrove | 62 | Snyder County |
| Jackson Twp Water Auth | PA4110021 | CWS | Johnstown | 4,236 | Cambria County |
| James Buchanan Middle/High Sch | PA7280346 | NTNCWS | Mercersburg | 1,450 | Franklin County |
| James Dorwart Apts | PA7670138 | CWS | Etters | 226 | York County |
| Jamestown Boro Water Auth | PA6430043 | CWS | Jamestown | 680 | Crawford County, Mercer County |
| Jay Twp Water Authority | PA6240005 | CWS | Weedville | 1,131 | Elk County |
| Jefferson Elementary School | PA2350326 | NTNCWS | Jefferson Township | 495 | Lackawanna County |
| Jefferson Estates Mhp | PA6430010 | CWS | Alpharetta | 57 | Mercer County |
| Jefferson Hospital | PA5020961 | NTNCWS | Jefferson Hills | 2,470 | Allegheny County |
| Jefferson Hospital Bucks | PA1090369 | NTNCWS | Philadelphia | 700 | Bucks County |
| Jefferson Hospital Lansdale | PA1460200 | NTNCWS | Philadelphia | 700 | Montgomery County |
| Jefferson Twp Water And Sewer | PA4560018 | CWS | Somerset | 350 | Somerset County |
| Jenner Twp Muni Auth | PA4560017 | CWS | Boswell | 576 | Somerset County |
| Jennerstown Muni Auth | PA4560038 | CWS | Jennerstown | 1,625 | Somerset County |
| Jim Thorpe Borough Water East | PA3130043 | CWS | Jim Thorpe | 2,853 | Carbon County |
| Jim Thorpe Borough Water West | PA3130044 | CWS | Jim Thorpe | 2,274 | Carbon County |
| Jim Thorpe School K To 8 Grade | PA3130920 | NTNCWS | Jim Thorpe | 660 | Carbon County |
| Joe Jurgielewicz & Son Ltd | PA3061263 | NTNCWS | Hamburg | 150 | Berks County |
| John F Martin And Sons Inc | PA7361034 | NTNCWS | Stevens | 120 | Lancaster County |
| John Grasse Elementary School | PA1091124 | NTNCWS | Perkasie | 600 | Bucks County |
| Johnsonburg Municipal Auth | PA6240007 | CWS | Johnsonburg | 2,413 | Elk County |
| Jones Twp Municipal Authority | PA6240020 | CWS | Wilcox | 396 | Elk County |
| Joseph Machine Company | PA7670333 | NTNCWS | Dillsburg | 70 | York County |
| Jubilee Daycare & Preschool | PA6431084 | NTNCWS | Clarks Mills | 45 | Mercer County |
| Jubilee Mhp | PA7360108 | CWS | Port Deposit | 30 | Lancaster County |
| Julia Ribaudo Extended Care | PA2640046 | CWS | Lake Ariel | 200 | Wayne County |
| Juniata Gap Elem Sch | PA4070341 | NTNCWS | Altoona | 620 | Blair County |
| Juniata Valley High Sch | PA4310309 | NTNCWS | Alexandria | 850 | Huntingdon County |
| Just A Mere Village | PA3060068 | CWS | Kutztown | 30 | Berks County |
| Ka Middlebury Mobile Home Park | PA2590018 | CWS | Hills Borough | 57 | Tioga County |
| Kadima At Lakeside | PA2400027 | CWS | Dallas | 91 | Luzerne County |
| Kadima Rehab | PA1150078 | CWS | Pottstown | 70 | Chester County |
| Kadima Rehab Nursing At Luzern | PA2400117 | CWS | Drums | 100 | Luzerne County |
| Kampel Enterprises Inc | PA7671014 | NTNCWS | Wellsville | 50 | York County |
| Kane Properties Tunkhannock | PA2660965 | NTNCWS | North Abington Twp | 130 | Wyoming County |
| Kaolin Holdings Mushroom Farm | PA1150925 | NTNCWS | Kennett Square | 140 | Chester County |
| Karns Food | PA7500868 | NTNCWS | Mechanisburg | 499 | Perry County |
| Katrinas Creative Learning | PA2350470 | NTNCWS | Moscow | 95 | Lackawanna County |
| Kelleys Rentals | PA2080012 | CWS | Rome | 65 | Bradford County |
| Kellows Mobile Home Park | PA3480041 | CWS | Bethlehem | 30 | Northampton County |
| Kemblesville Professional Ctr | PA1150708 | NTNCWS | Kemblesville | 100 | Chester County |
| Kempton New Ch Sch | PA3060888 | NTNCWS | Kempton | 75 | Berks County |
| Ken-Man Water Co | PA3390079 | CWS | Slatington | 475 | Lehigh County |
| Kennard Dale High School | PA7670301 | NTNCWS | Fawn Grove | 800 | York County |
| Kennerdell North Water System | PA6610859 | CWS | Kennerdell | 412 | Venango County |
| Ker Custom Molders | PA3060683 | NTNCWS | Birdsboro | 30 | Berks County |
| Kernsville Elementary School | PA3390828 | NTNCWS | Orefield | 750 | Lehigh County |
| Kerryview Mhp | PA2080004 | CWS | Towanda | 80 | Bradford County |
| Keswick Pointe | PA2450146 | CWS | East Stroudsburg | 50 | Monroe County |
| Kevorkian Building | PA1230910 | NTNCWS | Philadelphia | 60 | Delaware County |
| Key Bellevilles Inc | PA5650356 | NTNCWS | Leechburg | 85 | Westmoreland County |
| Keystone Apt Llc | PA4410016 | CWS | Mount Freedom | 100 | Lycoming County |
| Keystone Charter School | PA6430893 | NTNCWS | Greenville | 225 | Mercer County |
| Keystone Community Resources | PA2350600 | NTNCWS | Clarks Summit | 50 | Lackawanna County |
| Keystone Job Corps Center | PA2400023 | CWS | Drums | 500 | Luzerne County |
| Keystone Potato Prod Llc | PA3540977 | NTNCWS | Sacramento | 60 | Schuylkill County |
| Keystone Rv Center | PA7280946 | NTNCWS | South Burlington | 36 | Franklin County |
| Keystone Safari | PA6431104 | NTNCWS | Grove City | 100 | Mercer County |
| Keystone Trade Center | PA1090775 | NTNCWS | Morrisville | 1,454 | Bucks County |
| Kidspeace - Orchard Hills Camp | PA3390947 | NTNCWS | Orefield | 640 | Lehigh County |
| Kidsville Junction | PA7670354 | NTNCWS | Fawn Grove | 65 | York County |
| Kidzkorner Learning Center | PA2350361 | NTNCWS | Covington Township | 25 | Lackawanna County, Wyoming County |
| Killiam Tract | PA2520073 | CWS | Hamlin | 39 | Pike County |
| Kimberton Waldorf School | PA1150887 | NTNCWS | Phoenixville | 380 | Chester County |
| King Swings | PA1150656 | NTNCWS | Parkesburg | 50 | Chester County |
| Kingdom Hills Mobile Home Park | PA4110005 | CWS | Carrolltown | 55 | Cambria County |
| Kings Academy | PA3060356 | NTNCWS | Mohrsville | 190 | Berks County |
| Kings River Haven Mhp | PA7360002 | CWS | Bainbridge | 95 | Lancaster County |
| Kinsey Outdoors | PA7360990 | NTNCWS | Mount Joy | 80 | Lancaster County |
| Kinsley Commercial Plaza | PA2451389 | NTNCWS | Brodheadsville | 250 | Monroe County |
| Kipps Run Mobile Court | PA4490019 | CWS | Milton | 19 | Northumberland County |
| Kittanning Plumcreek Watr Auth | PA5030013 | CWS | Kittanning | 600 | Armstrong County |
| Knob Vue Estates | PA5040028 | CWS | Durham | 150 | Beaver County |
| Knouse Foods Inc Orrtanna | PA7010349 | NTNCWS | Peach Glen | 316 | Adams County |
| Knouse Foods Inc Peach Glen | PA7010415 | NTNCWS | Peach Glen | 340 | Adams County, Cumberland County |
| Knox Township Munic Authority | PA6330008 | CWS | Knox Dale | 300 | Jefferson County |
| Knox Water Works | PA6160005 | CWS | Knox | 1,380 | Clarion County |
| Knoxville Water Department | PA2590036 | CWS | Knoxville | 590 | Tioga County |
| Kraybill Mennonite Sch | PA7361044 | NTNCWS | Mount Joy | 400 | Lancaster County |
| Kreamer Mun Auth | PA4550014 | CWS | Kreamer | 980 | Snyder County |
| L & P Berwick | PA2400480 | NTNCWS | Berwick | 63 | Luzerne County |
| Laceyville Water Co | PA2660019 | CWS | Laceyville | 415 | Wyoming County |
| Lackawanna Trail High School | PA2660374 | NTNCWS | Factoryville | 750 | Wyoming County |
| Lake Adventure Community Assn | PA2520811 | NTNCWS | Milford | 499 | Pike County |
| Lake Arthur Estates | PA5100054 | CWS | Portersville | 460 | Butler County |
| Lake City Boro Munic Water | PA6250056 | CWS | Lake City | 2,935 | Erie County |
| Lake Lehman High School | PA2400369 | NTNCWS | Lehman | 750 | Luzerne County |
| Lake Meade Muni Auth | PA7010036 | CWS | East Berlin | 3,221 | Adams County |
| Lake Noxen Elementary School | PA2400375 | NTNCWS | Lehman | 450 | Luzerne County |
| Lake Of The Pines | PA2450015 | CWS | East Stroudsburg | 1,200 | Monroe County |
| Lake Raylean Water Association | PA2580036 | CWS | Montrose | 47 | Susquehanna County |
| Lake Rd Mhp Menu Mate Mushroom | PA1150208 | CWS | Toughkenamon | 65 | Chester County |
| Lake Region Iga | PA2640857 | NTNCWS | Cheshire | 80 | Wayne County |
| Lake Wallenpaupack Estates Poa | PA2520075 | CWS | Greentown | 204 | Pike County |
| Lake Wallenpaupack Sandy Shore | PA2640023 | CWS | Lakeville | 499 | Wayne County |
| Lakeland Elementary School | PA2350894 | NTNCWS | Scott Township | 450 | Lackawanna County |
| Lakeland Jr Sr High School | PA2350384 | NTNCWS | Scott Township | 820 | Lackawanna County |
| Lakerun Learning Center | PA2640520 | NTNCWS | Honesdale | 41 | Wayne County |
| Lakeshore Water Assn | PA6250039 | CWS | Fairview | 800 | Erie County |
| Lakeside Mhp | PA7380019 | CWS | Hershey | 40 | Lebanon County |
| Lakeview Manor Mhp | PA6200031 | CWS | Ambridge | 150 | Crawford County |
| Lakeview Mobile Home Park | PA7360023 | CWS | Elizabethtown | 275 | Lancaster County |
| Lakeview Personal Care | PA5040847 | CWS | Darlington | 100 | Beaver County |
| Lakewood Retreat | PA2451209 | NTNCWS | Bethlehem | 36 | Monroe County |
| Lanc Co Sol Wast Mgt Res Recov | PA7360978 | NTNCWS | Lancaster | 56 | Lancaster County |
| Lancaster Est | PA7360090 | CWS | Elizabethtown | 304 | Lancaster County |
| Lancaster Host | PA7361047 | NTNCWS | Lancaster | 150 | Lancaster County |
| Lancaster Mold | PA7360708 | NTNCWS | Lyon Station | 75 | Lancaster County |
| Lanchester Landfill | PA7360490 | NTNCWS | Honey Brook | 28 | Lancaster County |
| Landis Homes | PA7360071 | CWS | Lititz | 850 | Lancaster County |
| Lane Enterprises | PA7210943 | NTNCWS | Carlisle | 35 | Cumberland County |
| Laporte Boro Mun Water System | PA2570004 | CWS | Laporte | 325 | Sullivan County |
| Laurel Elementary School | PA6370300 | NTNCWS | New Castle | 750 | Lawrence County |
| Laurel Health Resources | PA3060031 | CWS | Hamburg | 240 | Berks County |
| Laurel High School | PA6370306 | NTNCWS | New Castle | 750 | Lawrence County |
| Laurel Lane Development Assoc | PA2520201 | CWS | Greentown | 179 | Pike County |
| Laurel Mountain Borough | PA5650101 | CWS | Laughlintown | 110 | Westmoreland County |
| Laurel Mountain Village | PA4560054 | CWS | Gray | 100 | Somerset County |
| Laurel Run Estates | PA2400034 | CWS | Lake Ariel | 340 | Luzerne County |
| Laurel Woods Mobile Home Park | PA2520031 | CWS | Dingmans Ferry | 70 | Pike County |
| Laurelwood Mhp | PA7670027 | CWS | Elizabethtown | 35 | York County |
| Lawrenceville Boro Water Dept | PA2590050 | CWS | Lawrenceville | 691 | Tioga County |
| Lazy Brook Management | PA2580015 | CWS | Montrose | 51 | Susquehanna County |
| Lazy K Campground | PA3060105 | CWS | Bechtelsville | 75 | Berks County |
| Lca Arcadia West Division | PA3391001 | CWS | Allentown | 1,392 | Lehigh County |
| Lca Beverly Hills Division | PA3390035 | CWS | Allentown | 122 | Lehigh County |
| Lca Clearview Farm Estates Div | PA3480028 | CWS | Allentown | 170 | Northampton County |
| Lca Emmaus Consecutive Div | PA3390075 | CWS | Allentown | 1,046 | Lehigh County |
| Lca Heidelberg Heights Div | PA3390047 | CWS | Allentown | 509 | Lehigh County |
| Lca Madison North Division | PA3390115 | CWS | Allentown | 290 | Lehigh County |
| Lca Mill Creek Division | PA3390080 | CWS | Allentown | 88 | Lehigh County |
| Lca Pine Lakes Division | PA3390085 | CWS | Allentown | 158 | Lehigh County |
| Lca Upper Milford Central Div | PA3390076 | CWS | Allentown | 256 | Lehigh County |
| Lca Washington Township Div | PA3390078 | CWS | Allentown | 965 | Lehigh County |
| Lcwsa Halls Station | PA4410035 | CWS | Montoursville | 518 | Lycoming County |
| Lcwsa Limestone Water | PA4410180 | CWS | Montoursville | 825 | Lycoming County |
| Lcwsa Village Water | PA4410174 | CWS | Montoursville | 598 | Lycoming County |
| Leacock Twp Mun Auth | PA7360084 | CWS | Intercourse | 1,640 | Lancaster County |
| Leap Frog Daycare Center | PA6330870 | NTNCWS | Punxsutawney | 102 | Jefferson County |
| Learning Locomotion Daycare | PA3480988 | NTNCWS | Easton | 40 | Northampton County |
| Lebanon Valley Christ School | PA3061147 | NTNCWS | Myerstown | 150 | Berks County |
| Lebanon Valley Mhc | PA7380016 | CWS | East Petersburg | 160 | Lebanon County |
| Leesburg Water Association | PA6430999 | CWS | Volant | 125 | Mercer County |
| Leesport Borough | PA3060047 | CWS | Leesport | 2,300 | Berks County |
| Lehet Village | PA4190025 | CWS | Benton | 40 | Columbia County, Northampton County |
| Lehigh Carbon Community Colleg | PA3390804 | NTNCWS | Schnecksville | 2,500 | Lehigh County |
| Lehigh Career & Technical Inst | PA3390933 | NTNCWS | Schnecksville | 2,400 | Lehigh County |
| Lehigh Cement Company Llc | PA3060878 | NTNCWS | Fleetwood | 130 | Berks County |
| Lehigh Elementary School | PA3480348 | NTNCWS | Northampton | 535 | Northampton County |
| Lehigh Twp Muni Auth | PA3480080 | CWS | Walnutport | 260 | Northampton County |
| Lehigh Valley Baptist Church | PA3390924 | NTNCWS | Emmaus | 125 | Lehigh County |
| Lehigh Valley Childrens Center | PA3390982 | NTNCWS | Allentown | 130 | Lehigh County |
| Lehigh Valley Dairies Ntnc | PA1461194 | NTNCWS | Lansdale | 328 | Montgomery County |
| Lehman Home Park | PA2400007 | CWS | Bridgewater | 63 | Luzerne County |
| Leidys Inc | PA1461078 | NTNCWS | Souderton | 260 | Montgomery County |
| Lenape Hills Trailer Park | PA3060016 | CWS | Pottstown | 44 | Berks County |
| Lenwood Park | PA7280058 | CWS | Morgantown | 230 | Franklin County |
| Leola Industrial Center | PA7360515 | NTNCWS | Malvern | 110 | Lancaster County |
| Leprino Foods | PA2080348 | NTNCWS | Waverly | 250 | Bradford County |
| Leraysville Water Company | PA2080007 | CWS | Leraysville | 360 | Bradford County |
| Lerew Red Barn Orchard | PA7010830 | NTNCWS | York Springs | 25 | Adams County |
| Lewis Run Borough | PA6420020 | CWS | Lewis Run | 892 | McKean County |
| Liberty Acres Mhp | PA6430041 | CWS | Hood River | 47 | Mercer County |
| Liberty Elementary School | PA2590841 | NTNCWS | Blossburg | 325 | Tioga County |
| Liberty Park | PA2580038 | CWS | Friendsville | 40 | Susquehanna County |
| Liberty Township | PA6430079 | CWS | Grove City | 138 | Mercer County |
| Liberty Travel Plaza Duncannon | PA7500331 | NTNCWS | Scranton | 1,002 | Perry County |
| Liberty Valley Elem School | PA4470315 | NTNCWS | Danville | 549 | Montour County |
| Liberty Village | PA7670136 | CWS | Camp Hill | 40 | York County |
| Lightbridge Academy | PA1090361 | NTNCWS | Fallsington | 175 | Bucks County |
| Ligonier Twp Muni Auth | PA5650080 | CWS | Ligonier | 3,293 | Westmoreland County |
| Lil Wolf Mhp | PA3390089 | CWS | Durham | 600 | Lehigh County |
| Lilly Borough Water Authority | PA4110046 | CWS | Lilly | 1,388 | Cambria County |
| Limestone Twp Mun Auth | PA4600007 | CWS | Mifflinburg | 200 | Union County |
| Lincoln Twp Muni Auth | PA4560031 | CWS | Sipesville | 1,400 | Somerset County |
| Lincolnwood Mhp | PA3060061 | CWS | Skokie | 450 | Berks County |
| Line Mountain Sr High School | PA4490309 | NTNCWS | Herndon | 644 | Northumberland County |
| Linesville Municipal Authority | PA6200027 | CWS | Linesville | 1,600 | Crawford County |
| Linville Hill Mennonite Sch | PA7360620 | NTNCWS | Paradise | 184 | Lancaster County |
| Lititz Area Mennonite Sch | PA7361041 | NTNCWS | Lititz | 250 | Lancaster County |
| Little Acres Learning Campus | PA2350516 | NTNCWS | Covington Township | 86 | Lackawanna County |
| Little Acres Mhp | PA5650012 | CWS | North Huntingdon | 30 | Westmoreland County |
| Little Britain Mennonite Schoo | PA7361108 | NTNCWS | Quarryville | 40 | Lancaster County |
| Little Britain Mhp | PA7360104 | CWS | Oxford | 60 | Lancaster County |
| Little Creek Estates M H P | PA5040051 | CWS | Belle Mead | 60 | Beaver County |
| Little Discoveries Daycare | PA2450837 | NTNCWS | Bartonsville | 72 | Monroe County |
| Little Dreams | PA7671035 | NTNCWS | Mechanicsburg | 85 | York County |
| Little Faces Learning Center | PA1460481 | NTNCWS | Gilbertsville | 65 | Montgomery County |
| Little Life Enrichment Ctr | PA7010955 | NTNCWS | New Oxford | 100 | Adams County |
| Little Lights Christian Acad | PA1150353 | NTNCWS | Coatesville | 65 | Chester County |
| Little Sprouts Early Learning | PA3061287 | NTNCWS | Bernville | 25 | Berks County |
| Little Wonders Learning Ctr | PA2521077 | NTNCWS | Dingmans Ferry | 75 | Pike County |
| Little Wrangler Ranch | PA3480894 | NTNCWS | Bangor | 45 | Northampton County |
| Liverpool Muni Auth | PA7500014 | CWS | Liverpool | 934 | Perry County |
| Llewellyns Mhp | PA7670006 | CWS | Dover | 250 | York County |
| Loags Corner Mobile Home Park | PA1150030 | CWS | Morgantown | 130 | Chester County |
| Locust Grove Mhp | PA7380008 | CWS | Annville | 49 | Lebanon County |
| Locust Grove Retirement Home | PA4340016 | CWS | Mifflin | 177 | Juniata County |
| Locust Manor Mhp | PA7670022 | CWS | Landisburg | 65 | York County |
| Locust Manor Plaza | PA3480333 | NTNCWS | Bethlehem | 100 | Northampton County |
| Locustwood Mobilehome Park | PA7360114 | CWS | Narvon | 81 | Lancaster County |
| Log Cabin Court | PA7360004 | CWS | Morgantown | 175 | Lancaster County |
| Log Road Village | PA2350065 | CWS | Hamlin | 68 | Lackawanna County |
| Loganton Boro Water System | PA4180052 | CWS | Loganton | 402 | Clinton County |
| Londonderry Court Mhp | PA1150019 | CWS | North East | 160 | Chester County |
| Londonderry Elem Sch | PA7220373 | NTNCWS | Hummelstown | 465 | Dauphin County |
| Londonderry Twp Water Sys | PA7220055 | CWS | Middletown | 36 | Dauphin County |
| Longswamp Ucc | PA3060667 | NTNCWS | Mertztown | 100 | Berks County |
| Longwood Gardens | PA1150131 | CWS | Kennett Square | 440 | Chester County |
| Look Away Golf Club | PA1090923 | NTNCWS | Buckingham | 200 | Bucks County |
| Loretto Boro Water Sys | PA4110065 | CWS | Loretto | 480 | Cambria County |
| Loves Travel Stop 731 | PA5101071 | NTNCWS | Oklahoma City | 430 | Butler County |
| Loves Trucking | PA3061210 | NTNCWS | Oklahoma City | 300 | Berks County |
| Lovetts Mobile Home Park | PA6250017 | CWS | Corry | 77 | Erie County |
| Lower Mahanoy Twp Mun Auth | PA4490018 | CWS | Dalmatia | 450 | Northumberland County |
| Loyalsock Mobile Home Park | PA4410025 | CWS | South Williamsport | 85 | Lycoming County |
| Loyalsock Valley Elementary | PA4410809 | NTNCWS | Montoursville | 430 | Lycoming County |
| Loyalton Water Assn | PA7220047 | CWS | Lykens | 100 | Dauphin County |
| Loysville Youth Dev Ctr | PA7500031 | CWS | Loysville | 249 | Perry County |
| Ludlow County Line System | PA6420032 | CWS | Ludlow | 81 | McKean County |
| Ludlow Warner System | PA6420011 | CWS | Ludlow | 76 | McKean County |
| Lupfers Grove Mhp & Cpgrd | PA7500032 | CWS | Shermans Dale | 55 | Perry County |
| Lv Hospital Cedar Crest | PA3390374 | NTNCWS | Allentown | 8,425 | Lehigh County |
| Lycoming Creek Village | PA4410011 | CWS | Sayre | 38 | Lycoming County |
| Lycoming Valley Jr High School | PA4410865 | NTNCWS | Williamsport | 450 | Lycoming County |
| Lykens Boro Auth | PA7220022 | CWS | Lykens | 3,220 | Dauphin County |
| Lynndale | PA2520987 | NTNCWS | Hamlin | 78 | Pike County |
| Lynwood Acres Mobile Home Park | PA2450084 | CWS | Bethlehem | 77 | Monroe County |
| Lyons Boro | PA3060096 | CWS | Lyon Station | 500 | Berks County |
| Macungie Borough Authority | PA3390033 | CWS | Macungie | 3,039 | Lehigh County |
| Macungie Village Mhp | PA3390010 | CWS | Northampton | 65 | Lehigh County |
| Madison Estates | PA2350061 | CWS | Moscow | 60 | Lackawanna County |
| Madisonburg Water Works | PA4140111 | CWS | Madisonburg | 250 | Centre County |
| Mae Eitel | PA3540923 | NTNCWS | Orwigsburg | 60 | Schuylkill County |
| Magic Chef Mhp | PA7360024 | CWS | Elizabethtown | 32 | Lancaster County |
| Magnolia Mhp | PA6370025 | CWS | Hood River | 75 | Lawrence County |
| Magnolia Personal Care Center | PA4340019 | CWS | Mifflintown | 80 | Juniata County |
| Mahanoy Centre | PA7500366 | NTNCWS | Newport | 100 | Perry County |
| Mahantongo Elementary School | PA3540453 | NTNCWS | Valley View | 150 | Schuylkill County |
| Mahoning Manor Estates | PA3130031 | CWS | Lehighton | 90 | Carbon County, Schuylkill County |
| Mahoning Township | PA6370054 | CWS | Sharon | 1,032 | Lawrence County |
| Mahoning Twp Muni Auth | PA5030024 | CWS | Distant | 900 | Armstrong County |
| Mahoning Valley Academy | PA3130821 | NTNCWS | Lehighton | 100 | Carbon County |
| Mahoning Valley Convalescent H | PA3130008 | CWS | Lehighton | 145 | Carbon County |
| Majestic Heights | PA6250020 | CWS | Cambridge Springs | 110 | Erie County |
| Majors Mobilehome Park | PA6370016 | CWS | New Castle | 55 | Lawrence County |
| Malvern Courts Mhp | PA1150011 | CWS | Sacramento | 250 | Chester County |
| Malvern School Of Glen Mills | PA1230360 | NTNCWS | Glen Mills | 125 | Delaware County |
| Manheim Christian Day Sch | PA7360531 | NTNCWS | Manheim | 198 | Lancaster County |
| Manheim Elem Sch | PA7671300 | NTNCWS | Hanover | 302 | York County |
| Manito Inc | PA7280917 | NTNCWS | Chambersburg | 95 | Franklin County |
| Mansfield University | PA2590812 | CWS | Mansfield | 3,000 | Tioga County |
| Manufacturers Golf & Cc | PA1460841 | NTNCWS | Fort Washington | 100 | Montgomery County |
| Maple Lane Estates | PA2400055 | CWS | Montandon | 200 | Luzerne County |
| Maple Park Garden Apartments | PA2520208 | CWS | Milford | 75 | Pike County |
| Maple Rock Trailer Court | PA2450006 | CWS | Henryville | 100 | Monroe County |
| Mapleton Muni Water Auth | PA4310015 | CWS | Mapleton Depot | 570 | Huntingdon County |
| Maplewood Elementary School | PA6200309 | NTNCWS | Saegertown | 500 | Crawford County |
| Maplewood Heights | PA2660034 | CWS | Factoryville | 32 | Wyoming County |
| Maplewood Jr/Sr High School | PA6200307 | NTNCWS | Saegertown | 600 | Crawford County |
| Maplewood Mobile Home Park | PA1150017 | CWS | Bowmansville | 70 | Chester County |
| Maranatha Christian School | PA4490826 | NTNCWS | Watsontown | 110 | Northumberland County |
| Margaret Seylar Elem School | PA1091271 | NTNCWS | Perkasie | 600 | Bucks County |
| Marian High School | PA3540452 | NTNCWS | Tamaqua | 320 | Schuylkill County |
| Marianna Muni Water Works | PA5630050 | CWS | Marianna | 480 | Washington County |
| Marion Twp Water Sys | PA5040087 | CWS | Fombell | 700 | Beaver County |
| Marion Twp Wtp | PA5100099 | CWS | Boyers | 225 | Butler County |
| Marlborough Elementary School | PA1461151 | NTNCWS | Pennsburg | 800 | Montgomery County |
| Mars Borough Water Works | PA5100049 | CWS | Mars | 1,956 | Butler County |
| Marshalls Square Shoppin Ctr | PA2451260 | NTNCWS | Macungie | 200 | Monroe County |
| Marsteller Comm Water Auth | PA4110020 | CWS | Marsteller | 75 | Cambria County |
| Martic Twp Elem Sch | PA7360568 | NTNCWS | Millersville | 456 | Lancaster County |
| Marticville Middle Sch | PA7361035 | NTNCWS | Millersville | 420 | Lancaster County |
| Martins Community Lp Mhp | PA1150144 | CWS | Cochranville | 180 | Chester County |
| Martins Creeks Ses | PA3480999 | NTNCWS | Bangor | 200 | Northampton County |
| Martinsburg Muni Auth | PA4070030 | CWS | Martinsburg | 3,160 | Blair County |
| Marworth Rehab Center | PA2350831 | NTNCWS | Waverly | 178 | Lackawanna County |
| Mary D Community Association | PA3540027 | CWS | Mary D | 250 | Schuylkill County |
| Masons Mobile City | PA6620036 | CWS | Moscow | 140 | Warren County |
| Materion Brush Inc | PA3060677 | NTNCWS | Shoemakersville | 140 | Berks County |
| Matric Limited | PA6610852 | NTNCWS | Seneca | 254 | Venango County |
| Mauell Corporation | PA7671099 | NTNCWS | Dillsburg | 50 | York County |
| Mawc Furnace Run | PA5650031 | CWS | Greensburg | 3,100 | Westmoreland County |
| Maxatawny Twp Muni Auth | PA3060013 | CWS | Kutztown | 425 | Berks County |
| Mazda Motor Of America | PA2350309 | NTNCWS | Covington Township | 50 | Lackawanna County |
| Mcadoo Industrial Park Water | PA3130837 | NTNCWS | Hazleton | 400 | Carbon County |
| Mcalisterville Area Joint Auth | PA4340002 | CWS | Mc Alisterville | 850 | Juniata County |
| Mcclure Municipal Authority | PA4550015 | CWS | Mcclure | 845 | Snyder County |
| Mcconnellsburg Boro Muni Auth | PA4290005 | CWS | Mc Connellsburg | 2,000 | Fulton County |
| Mcdonalds Brodheadsville | PA2451103 | NTNCWS | Netcong | 1,200 | Monroe County |
| Mckean Twp Waterworks | PA6250096 | CWS | Erie | 1,048 | Erie County |
| Mcma Hawstone | PA4440018 | CWS | Milroy | 60 | Mifflin County |
| Mcveytown Boro Auth | PA4440011 | CWS | Mc Veytown | 478 | Mifflin County |
| Meadow Brook M H P | PA4410154 | CWS | Perryville | 224 | Lycoming County |
| Meadow Lake Plaza | PA2451354 | NTNCWS | Stroudsburg | 99 | Monroe County |
| Meadowbrook Mobile Homes | PA3480008 | CWS | Barto | 60 | Northampton County |
| Meadows At Bethel Mhp | PA3060106 | CWS | Pottstown | 50 | Berks County |
| Meadows Mobile Home Park | PA5650042 | CWS | Diamondhead | 250 | Westmoreland County |
| Meadville Forging Co Main Bldg | PA6200804 | NTNCWS | Meadville | 170 | Crawford County |
| Meadville Housing Northgate | PA6200035 | CWS | Meadville | 256 | Crawford County |
| Mechanic Grove Church Of Breth | PA7360920 | NTNCWS | Quarryville | 450 | Lancaster County |
| Mehoopany School | PA2660951 | NTNCWS | Tunkhannock | 200 | Wyoming County |
| Mehoopany Twp Municipal Auth | PA2660020 | CWS | Mehoopany | 85 | Wyoming County |
| Melanie Manor Mobile Home Park | PA3540040 | CWS | Selinsgrove | 110 | Schuylkill County |
| Mellott Pamd Real Estate | PA4290825 | NTNCWS | Warfordsburg | 200 | Fulton County |
| Mercersburg Muni Water Auth | PA7280021 | CWS | Mercersburg | 2,350 | Franklin County |
| Meshoppen Townhouse Apts | PA2660044 | CWS | Nicholson | 65 | Wyoming County |
| Messiah Evan Luth Ch | PA7500888 | NTNCWS | Elliottsburg | 145 | Perry County |
| Met Ed Bethel Whse | PA3061076 | NTNCWS | Greensburg | 38 | Berks County |
| Meyersdale Muni Auth | PA4560012 | CWS | Meyersdale | 2,566 | Somerset County |
| Mid Lakes Development | PA3130037 | CWS | Blakeslee | 490 | Carbon County |
| Middleburg Municipal Authority | PA4550016 | CWS | Middleburg | 1,600 | Snyder County |
| Midland Boro Muni Auth | PA5040038 | CWS | Midland | 3,100 | Beaver County |
| Mifflin Cnty Sch Dist | PA4440317 | NTNCWS | Lewistown | 233 | Mifflin County |
| Mifflin Co Christian Academy | PA4440322 | NTNCWS | Mcclure | 85 | Mifflin County |
| Mignosis Foodtown | PA2451081 | NTNCWS | East Stroudsburg | 300 | Monroe County |
| Miles Twp Water Auth East | PA4140089 | CWS | Rebersburg | 425 | Centre County |
| Milesburg Borough Water Auth | PA4140083 | CWS | Milesburg | 2,750 | Centre County |
| Milford Hill Learning Center | PA2520951 | NTNCWS | Shohola | 100 | Pike County |
| Milford Professional Park | PA2520953 | NTNCWS | Tannersville | 100 | Pike County |
| Milford Senior Care | PA2520052 | CWS | Milford | 110 | Pike County |
| Milford Twp Munic Auth | PA4560014 | CWS | Rockwood | 75 | Somerset County |
| Milford Water Authority | PA2520046 | CWS | Milford | 2,420 | Pike County |
| Mill Creek Area Mun Auth | PA4310050 | CWS | Mill Creek | 1,108 | Huntingdon County |
| Millbach Mennonite School | PA7380430 | NTNCWS | Newmanstown | 125 | Lebanon County |
| Millbrook 5R 7 8 | PA2520981 | CWS | Greentown | 169 | Pike County |
| Millbrooke Est | PA7360172 | CWS | Stevens | 98 | Lancaster County |
| Millenium Theater | PA7360503 | NTNCWS | Ronks | 414 | Lancaster County |
| Miller Manor Homeowners Assoc | PA3480023 | CWS | Northampton | 90 | Berks County, Northampton County |
| Millers Edgewood Mhp | PA3480039 | CWS | Bath | 78 | Northampton County |
| Millers Restaurant | PA7360358 | NTNCWS | Ronks | 75 | Lancaster County |
| Millerstown Boro Water | PA7500021 | CWS | Millerstown | 700 | Perry County |
| Millfair Heights Water System | PA6250075 | CWS | Erie | 390 | Erie County |
| Millheim Borough Water Company | PA4140084 | CWS | Millheim | 902 | Centre County |
| Millvillage Elementary School | PA6250315 | NTNCWS | Waterford | 135 | Erie County |
| Miracle Mountain Ranch | PA6620371 | CWS | Spring Creek | 98 | Warren County |
| Misericordia University | PA2400423 | NTNCWS | Dallas | 2,400 | Luzerne County |
| Miss Doreens Playmation | PA3061095 | NTNCWS | Boyertown | 160 | Berks County |
| Miss Doreens Playmation Childc | PA1461124 | NTNCWS | Barto | 88 | Montgomery County |
| Mitchell Lake Mobile Home Park | PA6200002 | CWS | Cambridge Springs | 100 | Crawford County |
| Modern Mushroom Farms | PA1150211 | NTNCWS | Avondale | 400 | Chester County |
| Mohawk Area High School | PA6370303 | NTNCWS | New Castle | 850 | Lawrence County |
| Mohawk Elementary School | PA6370883 | NTNCWS | New Castle | 900 | Lawrence County |
| Monger Mobilehome Park | PA7360064 | CWS | Leola | 48 | Lancaster County |
| Moniteau Jr/Sr High School | PA5100324 | NTNCWS | West Sunbury | 600 | Butler County |
| Monroe County Correctional Fac | PA2450105 | CWS | Stroudsburg | 740 | Monroe County |
| Monroe County Safety Center | PA2451385 | NTNCWS | Stroudsburg | 100 | Monroe County |
| Monroe Elementary School | PA7210322 | NTNCWS | Mechanicsburg | 350 | Cumberland County |
| Monroe Franklin Elem School | PA2080393 | NTNCWS | Towanda | 25 | Bradford County |
| Monroe Plaza | PA2450623 | NTNCWS | Peckville | 190 | Monroe County |
| Monroe Valley Mhp | PA7380009 | CWS | Morgantown | 97 | Lebanon County |
| Mont Alto Municipal Authority | PA7280040 | CWS | Mont Alto | 1,705 | Franklin County |
| Montgomery Elem School | PA7280345 | NTNCWS | Mercersburg | 300 | Franklin County |
| Montgomery School | PA1150586 | NTNCWS | Chester Springs | 300 | Chester County |
| Montgomery Water Authority | PA4410161 | CWS | Montgomery | 2,700 | Lycoming County |
| Monument Water Authority | PA4140110 | CWS | Beech Creek | 140 | Centre County, Clinton County |
| Moon Valley Falls | PA2520103 | CWS | Milford | 120 | Pike County |
| Moore Elementary School | PA3480349 | NTNCWS | Northampton | 448 | Northampton County |
| Moraine Elementary School | PA5100418 | NTNCWS | Slippery Rock | 424 | Butler County |
| Moraine State Park Water Syst | PA5100804 | NTNCWS | Portersville | 1,200 | Butler County |
| Morea Citizens Water Company | PA3540021 | CWS | Pottsville | 225 | Schuylkill County |
| Morgan Truck Body Llc | PA7360984 | NTNCWS | Ephrata | 110 | Lancaster County |
| Morton Buildings Inc | PA7010875 | NTNCWS | Gettysburg | 55 | Adams County |
| Moscow Dev Assoc | PA2350002 | CWS | Moscow | 80 | Lackawanna County |
| Moscow Elementary Center | PA2350916 | NTNCWS | Moscow | 753 | Lackawanna County |
| Mount Airy Mhp | PA7670112 | CWS | Landisburg | 50 | York County |
| Mount Eagle Water Assoc | PA4140014 | CWS | Howard | 130 | Centre County |
| Mount Joy Township | PA7360942 | NTNCWS | Elizabethtown | 40 | Lancaster County |
| Mount Pleasant Mennonite Schoo | PA7500376 | NTNCWS | Elliottsburg | 25 | Perry County |
| Mount Rock Manor | PA7280053 | CWS | Morgantown | 350 | Franklin County |
| Mount Trexler Manor | PA3390113 | CWS | Limeport | 90 | Lehigh County |
| Mountain Crest Development | PA2640056 | CWS | Hamlin | 44 | Wayne County |
| Mountain Fresh Supermarket | PA2400954 | NTNCWS | Hunlock Creek | 526 | Luzerne County |
| Mountain Manor Community | PA2450115 | CWS | East Stroudsburg | 187 | Monroe County |
| Mountain Springs Mhp | PA3060118 | CWS | Monsey | 215 | Berks County |
| Mountain View Apartments | PA3061184 | NTNCWS | Reinholds | 40 | Berks County |
| Mountain View Elem School | PA2580845 | NTNCWS | Kingsley | 900 | Susquehanna County |
| Mountain View Estates | PA4190021 | CWS | Moscow | 80 | Columbia County |
| Mountain View Mhp | PA7010029 | CWS | Morgantown | 180 | Adams County |
| Mountain View Terrace | PA7670025 | CWS | Morgantown | 117 | York County |
| Mountain View Village | PA2450083 | CWS | Tannersville | 100 | Monroe County |
| Mountain Water Authority | PA3540026 | CWS | Tremont | 495 | Schuylkill County |
| Mountaindale Apartments | PA7220070 | CWS | Harrisburg | 50 | Dauphin County |
| Mountaintop Mobilehome Park | PA7360156 | CWS | Morgantown | 115 | Lancaster County |
| Mountaintop Reg Water Auth | PA4140090 | CWS | Snow Shoe | 3,456 | Centre County |
| Mountainview High School | PA2580312 | NTNCWS | Kingsley | 822 | Susquehanna County |
| Mountainview Mhp | PA3480075 | CWS | Durham | 335 | Northampton County |
| Mowersville Brethren In Christ | PA7280383 | NTNCWS | Newburg | 100 | Franklin County |
| Mowrey Elem Sch | PA7280333 | NTNCWS | Waynesboro | 695 | Franklin County |
| Mrs Bushs Personal Care Home | PA2450111 | CWS | Kunkletown | 70 | Monroe County |
| Mrs Colleens Childcare | PA2580329 | NTNCWS | Springville | 30 | Susquehanna County |
| Mt Aetna Mennonite School | PA3061283 | NTNCWS | Myerstown | 125 | Berks County |
| Mt Bethel Plaza | PA3480891 | NTNCWS | Mount Bethel | 95 | Northampton County |
| Mt Gretna Auth | PA7380024 | CWS | Mount Gretna | 485 | Lebanon County |
| Mt Gretna Campmeeting Assn | PA7380023 | CWS | Mount Gretna | 375 | Lebanon County |
| Mt Gretna Heights Water Sys | PA7380039 | CWS | Mount Gretna | 125 | Lebanon County |
| Mt Holly Springs Boro Auth | PA7210037 | CWS | Mt Holly Springs | 3,261 | Cumberland County |
| Mt Hope Nazarene Ret Comm | PA7360077 | CWS | Manheim | 141 | Lancaster County |
| Mt Idy Mobile Home Park | PA1150020 | CWS | Narvon | 80 | Chester County |
| Mt Laurel Mobile Home Village | PA2350013 | CWS | Moscow | 120 | Lackawanna County |
| Mt Morris Water & Sewage Auth | PA5300015 | CWS | Mount Morris | 1,500 | Greene County |
| Mt View Terrace Mhp | PA7210059 | CWS | York | 179 | Cumberland County |
| Mt Village Mhp | PA3060095 | CWS | Norristown | 771 | Berks County |
| Mtn Comm Family & Service Ctr | PA2451118 | NTNCWS | East Stroudsburg | 200 | Monroe County |
| Mtn View Christian Sch | PA4560388 | NTNCWS | Springs | 70 | Somerset County |
| Muddy Creek Christian School | PA7360639 | NTNCWS | Denver | 55 | Lancaster County |
| Muncy Borough Water Company | PA4410165 | CWS | Muncy | 2,900 | Lycoming County |
| Muncy Homes Inc Premier Well | PA4410402 | NTNCWS | Muncy | 135 | Lycoming County |
| Muncy Homes Inc Office Well | PA4410400 | NTNCWS | Muncy | 50 | Lycoming County |
| Muncy State Correctional Inst | PA4410176 | CWS | Muncy | 2,050 | Lycoming County |
| Muni Auth Of Boro Of Matamoras | PA2520044 | CWS | Matamoras | 2,900 | Pike County |
| Mushroom Farm | PA2450068 | CWS | Tobyhanna | 172 | Monroe County |
| Mussers Inc | PA7361031 | NTNCWS | Quarryville | 100 | Lancaster County |
| Myerstown Mennonite Sch | PA7380357 | NTNCWS | Myerstown | 168 | Lebanon County |
| N Annville Mhp | PA7380004 | CWS | Hershey | 72 | Lebanon County |
| N E Trailer Court | PA4110010 | CWS | Ebensburg | 81 | Cambria County |
| N Hanover Evangel Luth Church | PA1460339 | NTNCWS | Gilbertsville | 300 | Montgomery County |
| N Hopewell Winterstown Elem | PA7671303 | NTNCWS | Red Lion | 322 | York County |
| Nathans Hamlet | PA3130052 | CWS | Maspeth | 60 | Carbon County, Northampton County |
| National Beef Packing Co Llc | PA4550825 | NTNCWS | Selinsgrove | 150 | Snyder County |
| National Pike Water Auth | PA5260048 | CWS | Markleysburg | 2,800 | Fayette County |
| Natl Fuel Gas Sharon Svc Ctr | PA6431037 | NTNCWS | Erie | 38 | Mercer County |
| Nc Stauffer And Sons Inc | PA2660969 | NTNCWS | Factoryville | 30 | Wyoming County |
| Neelyton Water Coop | PA4310017 | CWS | Neelyton | 57 | Huntingdon County |
| Neighbors Of Penn Lake | PA6200013 | CWS | Middletown | 54 | Crawford County |
| Nelson Township Authority | PA2590051 | CWS | Nelson | 300 | Tioga County |
| Nemacolin Woodlands | PA5260045 | CWS | Farmington | 1,300 | Fayette County |
| Neshaminy Manor Center | PA1090093 | CWS | Warrington | 2,100 | Bucks County |
| Neshaminy Warwick Pres Church | PA1091145 | NTNCWS | Hartsville | 300 | Bucks County |
| Nesquehoning Boro Water Auth | PA3130026 | CWS | Nesquehoning | 2,850 | Carbon County |
| Nestle Purina Petcare Co | PA3390814 | NTNCWS | Allentown | 640 | Lehigh County |
| Nevilles Mobile Home Court | PA2640006 | CWS | Milford | 85 | Wayne County |
| New Albany Water Fund | PA2080010 | CWS | New Albany | 336 | Bradford County |
| New Berlin Municipal Authority | PA4600010 | CWS | New Berlin | 990 | Union County |
| New Castle Estates | PA6370014 | CWS | Youngwood | 80 | Lawrence County |
| New Castle School Of Trades | PA6370852 | NTNCWS | New Castle | 150 | Lawrence County |
| New Covenant Kids Kare | PA4410415 | NTNCWS | Montgomery | 33 | Lycoming County |
| New Drums Elementary School | PA2401010 | NTNCWS | Hazle Township | 400 | Luzerne County |
| New Enterprise Water Assn | PA4050033 | CWS | New Enterprise | 500 | Bedford County |
| New Hanover Cc Gilbertsville | PA1461082 | NTNCWS | Gilbertsville | 50 | Montgomery County |
| New Hanover Upper Fred E S | PA1460861 | NTNCWS | Boyertown | 850 | Montgomery County |
| New Haven Mennonite School | PA7360783 | NTNCWS | Lititz | 130 | Lancaster County |
| New Holland Elementary School | PA7361016 | NTNCWS | New Holland | 647 | Lancaster County |
| New Holland Shopping Center | PA7361030 | NTNCWS | Lititz | 825 | Lancaster County |
| New Hope Solebury Elem School | PA1090885 | NTNCWS | New Hope | 291 | Bucks County |
| New Life For Girls | PA7670122 | CWS | Dover | 80 | York County |
| New Meadow Run | PA5260042 | CWS | Farmington | 300 | Fayette County |
| New Milford Municipal Auth | PA2580019 | CWS | New Milford | 979 | Susquehanna County |
| New Morgan Boro Util Auth | PA3060803 | NTNCWS | Morgantown | 250 | Berks County |
| New Oxford Manor Mhp | PA7010023 | CWS | Banner Elk | 350 | Adams County |
| New Oxford Mhc | PA7010041 | CWS | Farmington Hills | 437 | Adams County |
| New Story Kutztown | PA3060353 | NTNCWS | Baltimore | 64 | Berks County |
| Newberry Est | PA7670119 | CWS | Morgantown | 200 | York County |
| Newell Muni Auth | PA5260014 | CWS | Newell | 520 | Fayette County |
| Newmanstown Water Auth | PA7380028 | CWS | Newmanstown | 2,335 | Lebanon County |
| Newport Boro Water Auth | PA7500022 | CWS | Newport | 3,200 | Perry County |
| Newton Hamilton Boro | PA4440013 | CWS | Newton Hamilton | 270 | Mifflin County |
| Newton Recreation Center | PA2350604 | NTNCWS | Clarks Summit | 50 | Lackawanna County |
| Newtown Hill Trailer Park | PA2590006 | CWS | Miller Place | 50 | Centre County, Tioga County |
| Nh Childcare Zieglerville | PA1461091 | NTNCWS | Zieglerville | 50 | Montgomery County |
| Nicholson Boro Auth | PA2660011 | CWS | Nicholson | 789 | Wyoming County |
| Nis Hollow Estates | PA3130006 | CWS | Lehighton | 265 | Carbon County |
| Nittany Grove Condo Comm Assn | PA4140057 | CWS | State College | 45 | Centre County |
| Noahs Ark Preschool | PA1091397 | NTNCWS | Quakertown | 90 | Bucks County |
| Nolts Red Maple Mhp | PA7360068 | CWS | Lititz | 51 | Lancaster County |
| Norm Fish Jay Park Plaza | PA2451139 | NTNCWS | East Stroudsburg | 140 | Monroe County |
| North Coventry Water System | PA1150220 | CWS | Pottstown | 2,907 | Chester County |
| North Dickinson Elem Sch | PA7210341 | NTNCWS | Carlisle | 253 | Cumberland County |
| North East Township Water | PA6250086 | CWS | North East | 5,848 | Erie County |
| North Penn Liberty High School | PA2590842 | NTNCWS | Blossburg | 325 | Tioga County |
| North Pocono High School | PA2350955 | NTNCWS | Moscow | 1,100 | Lackawanna County |
| North Pocono Intermediate Schl | PA2350324 | NTNCWS | Moscow | 600 | Lackawanna County |
| North Pocono Middle School | PA2350323 | NTNCWS | Moscow | 1,149 | Lackawanna County |
| North Ridge Center | PA4340305 | NTNCWS | Mc Alisterville | 25 | Juniata County |
| North Star East Mid Sch | PA4560341 | NTNCWS | Boswell | 325 | Somerset County |
| North Star Village | PA6370017 | CWS | Butler | 60 | Lawrence County |
| North Warren Muni Authority | PA6620028 | CWS | Warren | 1,749 | Warren County |
| Northeast Bradford School Dist | PA2080360 | NTNCWS | Rome | 890 | Bradford County |
| Northern Potter Childrens Sch | PA6530892 | NTNCWS | Ulysses | 340 | Potter County |
| Northern Potter High School | PA6530863 | NTNCWS | Ulysses | 265 | Potter County |
| Northern Tier Childrens Home | PA6530001 | CWS | Harrison Valley | 45 | Potter County |
| Northridge At Camelback | PA2450124 | CWS | Tannersville | 330 | Monroe County |
| Northside Heights Estates | PA3130051 | CWS | Lehighton | 461 | Carbon County |
| Northwest Jr Sr High School | PA2400394 | NTNCWS | Shickshinny | 650 | Luzerne County |
| Northwest Primary School | PA2400395 | NTNCWS | Shickshinny | 301 | Luzerne County |
| Northwestern Lancaster Co Auth | PA7360164 | CWS | Manheim | 2,968 | Lancaster County |
| Nottingham Manor M H Court | PA1150177 | CWS | Nottingham | 473 | Chester County |
| Novares | PA7671084 | NTNCWS | Felton | 90 | York County |
| Nuremburg Water Co Veolia | PA3540023 | CWS | Bloomsburg | 340 | Schuylkill County |
| Nvr Bldg Prod | PA5040303 | NTNCWS | Enon Valley | 200 | Beaver County |
| Nwlsd Elementary School | PA3390344 | NTNCWS | New Tripoli | 582 | Lehigh County |
| Nwlsd High School | PA3390345 | NTNCWS | New Tripoli | 821 | Lehigh County |
| Nwlsd Middle School | PA3390965 | NTNCWS | New Tripoli | 681 | Lehigh County |
| Nwwa Durham Village | PA1090099 | CWS | North Wales | 160 | Bucks County |
| Nwwa Hermitage | PA1090102 | CWS | North Wales | 75 | Bucks County |
| Nwwa Ingham Mews | PA1090103 | CWS | Warrington | 97 | Bucks County |
| Nwwa Logan Square | PA1091091 | NTNCWS | North Wales | 1,000 | Bucks County |
| Nwwa Olde Colonial Greene | PA1090097 | CWS | North Wales | 900 | Bucks County |
| Nwwa Pine Run | PA1090098 | CWS | North Wales | 700 | Bucks County |
| Nwwa Yorkshire Meadows | PA1090101 | CWS | North Wales | 90 | Bucks County |
| O Yes Apts | PA7380051 | CWS | Lancaster | 35 | Lebanon County |
| Oak Grove Apartments | PA2450147 | CWS | East Stroudsburg | 30 | Monroe County |
| Oak Grove Park Mhp | PA1460030 | CWS | Hatfield | 130 | Montgomery County |
| Oak Hill School | PA7280948 | NTNCWS | Fayetteville | 46 | Franklin County |
| Oak Knoll Est Mhp | PA7220001 | CWS | Morgantown | 350 | Dauphin County |
| Oak Lane Mennonite School | PA7360795 | NTNCWS | Manheim | 50 | Lancaster County |
| Oak Lynn Manor Mobile Home Pk | PA4410153 | CWS | Williamsport | 250 | Lycoming County |
| Oak Manor Estates | PA2520095 | CWS | Milford | 50 | Pike County |
| Oak Ridge Authority | PA4140119 | CWS | Tyrone | 700 | Blair County, Centre County |
| Oak Run Village | PA2450123 | CWS | Stroudsburg | 60 | Monroe County |
| Oak Village | PA7010011 | CWS | Lewisberry | 225 | Adams County |
| Oakdale Boro Water Dept | PA5020067 | CWS | Oakdale | 1,459 | Allegheny County |
| Oakland Borough Water Auth | PA2580025 | CWS | Susquehanna | 563 | Susquehanna County |
| Oakland Trailer Park | PA2580035 | CWS | New Milford | 90 | Susquehanna County |
| Oakridge Park | PA7360117 | CWS | Stevens | 75 | Lancaster County |
| Oaks Senior Community | PA2450142 | CWS | Cresco | 84 | Monroe County |
| Oakwood Heights Mhp | PA7670114 | CWS | Stewartstown | 54 | York County |
| Oakwood Lake Village Mhp | PA2660031 | CWS | Morgantown | 273 | Wyoming County |
| Octorara Area School District | PA1150869 | NTNCWS | Atglen | 3,100 | Chester County |
| Odyssey Behavioral Health | PA1090371 | NTNCWS | Warminster | 50 | Bucks County |
| Officers Christian Fellowship | PA4050907 | NTNCWS | Manns Choice | 100 | Bedford County |
| Ohioville Boro Muni Auth | PA5040044 | CWS | Industry | 2,750 | Beaver County |
| Oil Creek Twp Waterworks | PA6200081 | NTNCWS | Titusville | 50 | Crawford County |
| Ojrsd E Vincent Elem School | PA1150916 | NTNCWS | Pottstown | 538 | Chester County |
| Ojrsd French Creek Elem Sch | PA1150884 | NTNCWS | Pottstown | 700 | Chester County |
| Ojrsd N Coventry Elem School | PA1150752 | NTNCWS | Pottstown | 530 | Chester County |
| Ojrsd Owen J Roberts Ms And Hs | PA1150886 | NTNCWS | Pottstown | 1,750 | Chester County |
| Ojrsd Warwick Admin Bldg | PA1150866 | NTNCWS | Pottstown | 126 | Chester County |
| Old Orchard Apts | PA2660043 | CWS | Nicholson | 38 | Wyoming County |
| Old Orchard Subdivision | PA6250038 | CWS | Fairview | 96 | Erie County |
| Old Stage Plaza | PA3130800 | NTNCWS | Lindenhurst | 75 | Carbon County |
| Oldcastle Infrastructure | PA1090321 | NTNCWS | Telford | 100 | Bucks County |
| Oley Twp Muni Auth | PA3060053 | CWS | Oley | 2,204 | Berks County |
| Olympic Village | PA4410020 | CWS | Landisburg | 98 | Lycoming County |
| Omnova North America Inc | PA3540898 | NTNCWS | Auburn | 220 | Schuylkill County |
| Ontelaunee Farms | PA3061265 | NTNCWS | Temple | 37 | Berks County |
| Ontelaunee Township | PA3060098 | CWS | Reading | 2,598 | Berks County |
| Orangeville Municipal Water Au | PA4190012 | CWS | Orangeville | 508 | Columbia County |
| Orbisonia Rockhill Jt Mun Auth | PA4310025 | CWS | Orbisonia | 1,200 | Huntingdon County |
| Orchard East Water Assoc | PA2400107 | CWS | Dallas | 85 | Luzerne County |
| Orchard Grove Mhp | PA2640299 | CWS | Beach Lake | 66 | Wayne County |
| Orchard Hills Apts | PA4340017 | CWS | Mexico | 499 | Juniata County |
| Orchard Hills Mhp | PA7500010 | CWS | Morgantown | 303 | Perry County |
| Orchard Mobile Home Park | PA4410027 | CWS | Muncy | 325 | Lycoming County |
| Orchard West Water Assoc | PA2400113 | CWS | Dallas | 90 | Luzerne County |
| Ore Hill Water Assn | PA4070297 | CWS | Roaring Spring | 80 | Blair County |
| Oregon Dairy Inc | PA7361076 | NTNCWS | Lititz | 510 | Lancaster County |
| Orviston Water Assoc Inc | PA4140104 | CWS | Orviston | 72 | Centre County, Clinton County |
| Orwigsburg Municipal Water Wks | PA3540024 | CWS | Orwigsburg | 3,000 | Schuylkill County |
| Osceola Twp Municipal Authorit | PA2590045 | CWS | Osceola | 400 | Tioga County |
| Ossies Mobile Home Community | PA3390001 | CWS | Orefield | 40 | Lehigh County |
| Osterburg Water Co | PA4050030 | CWS | Osterburg | 250 | Bedford County |
| Otto Eldred High School | PA6420365 | NTNCWS | Duke Center | 342 | McKean County |
| Overpeck Mhp | PA2660006 | CWS | Lake Hiawatha | 25 | Wyoming County |
| Pa Amer Water Co Fallbrook | PA2359006 | CWS | Wilkes Barre | 2,851 | Lackawanna County |
| Pa Amer Water Co Forest City | PA2359014 | CWS | Wilkes Barre | 3,188 | Lackawanna County, Susquehanna County, Wayne County |
| Pa Amer Water Co Indian Rocks | PA2640047 | CWS | Tobyhanna | 1,100 | Wayne County |
| Pa Amer Water Co Lake Heritage | PA7010035 | CWS | Mechanicsburg | 1,648 | Adams County |
| Pa Amer Water Co Laurel Ridge | PA3540072 | CWS | Milton | 105 | Schuylkill County |
| Pa Amer Water Co Montrose | PA2580023 | CWS | Clarks Summit | 1,890 | Susquehanna County |
| Pa Amer Water Co Olwen Heights | PA2350032 | CWS | Scranton | 330 | Lackawanna County |
| Pa Amer Water Co Spangenberg | PA2350026 | CWS | Scranton | 370 | Lackawanna County |
| Pa Amer Water Thompson | PA2580026 | CWS | Clarks Summit | 225 | Susquehanna County |
| Pa American Mcewensville | PA4490298 | CWS | Milton | 282 | Northumberland County |
| Pa American Turbotville | PA4490016 | CWS | Milton | 705 | Northumberland County |
| Pa State Police Coudersport | PA6530313 | NTNCWS | Schuylkill Haven | 32 | Potter County |
| Pa State Univ Mont Alto Campus | PA7280815 | NTNCWS | Mont Alto | 1,300 | Franklin County |
| Palisades Middle School | PA1091361 | NTNCWS | Kintnersville | 366 | Bucks County |
| Palisades Senior High School | PA1091296 | NTNCWS | Kintnersville | 562 | Bucks County |
| Palm City Park | PA7380005 | CWS | Annville | 490 | Lebanon County |
| Palmer Shore Water | PA6250035 | CWS | Fairview | 150 | Erie County |
| Panorama Mhp | PA7010028 | CWS | Bowmansville | 70 | Adams County |
| Papettis Hygrade Egg Products | PA3540932 | NTNCWS | Klingerstown | 290 | Schuylkill County |
| Paradise Elementary School | PA7360779 | NTNCWS | Kinzers | 551 | Lancaster County |
| Paradise Energy Solutions | PA7360884 | NTNCWS | Paradise | 100 | Lancaster County |
| Paradise Meadows | PA7360130 | CWS | Paradise | 90 | Lancaster County |
| Paradise Mhp | PA7500003 | CWS | Charlottesville | 550 | Perry County |
| Paradise Point | PA2640052 | CWS | Madison | 300 | Wayne County |
| Paradise Sch | PA7670017 | NTNCWS | Abbottstown | 90 | York County |
| Paramount Senior Living | PA7010007 | CWS | Fayetteville | 250 | Adams County |
| Park 81 Warehouse | PA7211012 | NTNCWS | Shippensburg | 60 | Cumberland County |
| Park Road Est | PA3060026 | CWS | Narvon | 29 | Berks County |
| Parker Area Water Auth | PA5030011 | CWS | Parker | 900 | Armstrong County, Butler County |
| Parkhouse Nursing & Rehab Ctr | PA1460008 | CWS | Royersford | 1,200 | Montgomery County |
| Parks Twp Muni Auth | PA5030025 | CWS | Vandergrift | 2,049 | Armstrong County |
| Parkwood Mhp | PA6200046 | CWS | Edinboro | 100 | Crawford County |
| Pathways | PA1230886 | CWS | Wawa | 53 | Delaware County |
| Patton Boro Water Dept | PA4110024 | CWS | Patton | 1,805 | Cambria County |
| Paupack Point Water Assoc | PA2640846 | CWS | Hawley | 180 | Wayne County |
| Paw Boggs | PA4140101 | CWS | Philipsburg | 97 | Centre County |
| Paw Golden Oaks | PA3060126 | CWS | Birdsboro | 100 | Berks County |
| Paw Homesite | PA2400072 | CWS | Scranton | 69 | Luzerne County |
| Paw Nittany | PA4140081 | CWS | Philipsburg | 1,515 | Centre County, Clinton County |
| Paw Sutton Hills | PA2400128 | CWS | Scranton | 195 | Luzerne County |
| Paw Wildcat Park | PA3540053 | CWS | Berwick | 73 | Schuylkill County |
| Paw Winola | PA2660004 | CWS | Bangor | 63 | Wyoming County |
| Pawc All Seasons System | PA2520056 | CWS | Tobyhanna | 100 | Pike County |
| Pawc Appalachian Dist | PA4180067 | CWS | Milton | 3,000 | Clinton County |
| Pawc Berry Hollow | PA3480053 | CWS | Clarks Summit | 70 | Northampton County |
| Pawc Blue Mt Lake | PA2450133 | CWS | Tobyhanna | 1,753 | Monroe County |
| Pawc Corner | PA6160027 | CWS | Philipsburg | 857 | Clarion County |
| Pawc Fernwood | PA2450134 | NTNCWS | Tobyhanna | 545 | Monroe County |
| Pawc Hillcrest | PA2400070 | CWS | Scranton | 125 | Luzerne County |
| Pawc Manwalamink | PA2450049 | CWS | Tobyhanna | 3,200 | Monroe County |
| Pawc Manwalamink Ns 1&2 | PA2450099 | CWS | Tobyhanna | 600 | Monroe County |
| Pawc Manwalamink Ns 3 | PA2450113 | CWS | Tobyhanna | 1,100 | Monroe County |
| Pawc Marcel Lakes | PA2520035 | CWS | Tobyhanna | 1,048 | Pike County |
| Pawc Mid Monroe | PA2450119 | CWS | Tobyhanna | 1,580 | Monroe County |
| Pawc Milford Landing | PA2520085 | CWS | Tobyhanna | 468 | Pike County |
| Pawc Pine Ridge System | PA2520096 | CWS | Tobyhanna | 2,450 | Pike County |
| Pawc Westgate | PA3480024 | CWS | Clarks Summit | 2,668 | Northampton County |
| Pawc Wild Acres | PA2520034 | CWS | Tobyhanna | 2,943 | Pike County |
| Peaceful Acres Trailers | PA6250053 | CWS | Fairview | 165 | Erie County |
| Peach Bottom Power Sta | PA7670905 | NTNCWS | Delta | 1,500 | Lancaster County, York County |
| Peddlers Village | PA1090153 | CWS | Lahaska | 960 | Bucks County |
| Pediatric Specialty Care | PA1090049 | CWS | Pt Pleasant | 56 | Bucks County |
| Pel Healthcare | PA1091390 | NTNCWS | Sellersville | 160 | Bucks County |
| Penn 80 Milton | PA4490300 | NTNCWS | Milton | 300 | Northumberland County |
| Penn Engineering And Mfg | PA1090939 | NTNCWS | Danboro | 220 | Bucks County |
| Penn Power Clark Service Ctr | PA6431011 | NTNCWS | Greensburg | 50 | Mercer County |
| Penn St Wilkes Barre Campus | PA2400026 | NTNCWS | University Park | 891 | Luzerne County |
| Penn State Arl | PA4140865 | NTNCWS | University Park | 40 | Centre County |
| Penn Township Municipal Auth | PA4550028 | CWS | Selinsgrove | 672 | Snyder County |
| Penn Twp Water Dist | PA4140078 | CWS | Coburn | 300 | Centre County |
| Penn United Tech | PA5100426 | NTNCWS | Cabot | 340 | Butler County |
| Penn Valley Village | PA7360069 | CWS | Camp Hill | 225 | Lancaster County |
| Pennex Alum Co | PA7670944 | NTNCWS | Wellsville | 180 | York County |
| Pennland Farms | PA1090163 | CWS | Perkasie | 452 | Bucks County |
| Penns Valley Area High School | PA4140812 | NTNCWS | Spring Mills | 1,170 | Centre County |
| Penns Valley Medical Center | PA4140902 | NTNCWS | Spring Mills | 28 | Centre County |
| Pennsylvania 940 Station | PA2451203 | NTNCWS | Mount Pocono | 75 | Monroe County |
| Pennsylvania College Of Tech | PA4410949 | NTNCWS | Williamsport | 300 | Lycoming County |
| Pennwood Estates Mhp | PA6430021 | CWS | Bethlehem | 51 | Mercer County |
| Penny Park | PA7360056 | CWS | Elizabethtown | 51 | Lancaster County |
| Pequea Christian School | PA7361107 | NTNCWS | Narvon | 96 | Lancaster County |
| Pequea Mennonite School | PA7360634 | NTNCWS | New Holland | 40 | Lancaster County |
| Pequea Water Coop Assn | PA7360138 | CWS | Pequea | 121 | Lancaster County |
| Perdue Grain And Oilseed Llc | PA7360789 | NTNCWS | Marietta | 100 | Lancaster County |
| Perkiomen Crossing | PA1460087 | CWS | Frederick | 508 | Montgomery County |
| Perlo Ridge Apts | PA7500036 | CWS | Loysville | 42 | Perry County |
| Perry County Business Campus 1 | PA7500879 | NTNCWS | Harrisburg | 100 | Perry County |
| Perry County Generations | PA7500365 | NTNCWS | Landisburg | 41 | Perry County |
| Perry Health Ctr | PA7500320 | NTNCWS | Selinsgrove | 100 | Perry County |
| Perry Lake Estates | PA5100043 | CWS | Glenmoore | 44 | Butler County |
| Perry Phillips Mobile Homes | PA1150189 | CWS | Coatesville | 60 | Chester County |
| Perry Twp Muni Auth | PA3060123 | CWS | Shoemakersville | 145 | Berks County |
| Perry Twp Municipal Auth | PA4550018 | CWS | Mt Pleasant Mills | 285 | Snyder County |
| Perryville Water Association | PA6160011 | CWS | Parker | 120 | Clarion County |
| Peter J. Camiel Service Plaza | PA1150616 | NTNCWS | Glen Rock | 1,100 | Chester County |
| Peters Elementary School | PA3390352 | NTNCWS | Slatington | 426 | Lehigh County |
| Petersburg Bor Water Auth | PA4310019 | CWS | Petersburg | 650 | Huntingdon County |
| Petersburg Commons Water Syste | PA7500016 | CWS | Duncannon | 100 | Perry County |
| Petroleum Valley Rwa | PA5100147 | CWS | Petrolia | 3,800 | Butler County |
| Phb Die Casting | PA6250826 | NTNCWS | Fairview | 264 | Erie County |
| Phb Machining Division | PA6250323 | NTNCWS | Fairview | 200 | Erie County |
| Philhaven | PA7381023 | NTNCWS | Mount Gretna | 495 | Lebanon County |
| Philip Bongiorno Conf Cntr | PA7210838 | NTNCWS | Carlisle | 250 | Cumberland County |
| Philly B&M Steaks | PA1460496 | NTNCWS | Harleysville | 50 | Montgomery County |
| Phoenix Sintered Metals | PA6530860 | NTNCWS | Galeton | 80 | Potter County |
| Pigeon Hill School | PA7280918 | NTNCWS | Waynesboro | 50 | Franklin County |
| Pik Rite | PA4600874 | NTNCWS | Lewisburg | 70 | Union County |
| Pike County Correctional Facil | PA2520107 | CWS | Lords Valley | 500 | Pike County |
| Pillow Boro Auth | PA7220046 | CWS | Pillow | 312 | Dauphin County |
| Pilot Travel Center | PA5101025 | NTNCWS | Knoxville | 1,100 | Butler County |
| Pilot Travel Center No518 | PA3060504 | NTNCWS | Knoxville | 980 | Berks County |
| Pilot Travel Ctr No 517 | PA7220805 | NTNCWS | Knoxville | 980 | Dauphin County |
| Pine Garden Apartments | PA5650026 | CWS | Greensburg | 40 | Westmoreland County |
| Pine Grove Boro Water System | PA3540037 | CWS | Pine Grove | 2,711 | Schuylkill County |
| Pine Grove Estates | PA2640049 | CWS | Hamlin | 263 | Wayne County |
| Pine Grove Mobile Home Park | PA6430046 | CWS | Mercer | 244 | Mercer County |
| Pine Grove Twp Water System | PA6620029 | CWS | Russell | 640 | Warren County |
| Pine Manor Mhp | PA7220029 | CWS | Morgantown | 302 | Dauphin County |
| Pine Point Plaza | PA3130313 | NTNCWS | Albrightsville | 100 | Carbon County |
| Pine Terrace Mobile Home Park | PA3540042 | CWS | Honey Brook | 50 | Schuylkill County |
| Pine Twp Water Distr System | PA6430061 | CWS | Grove City | 3,082 | Mercer County |
| Pine Valley Estates | PA5100040 | CWS | Durham | 93 | Butler County |
| Pine Valley Mobile Home Court | PA4600003 | CWS | Mifflinburg | 425 | Union County |
| Pinebrook Place Ltd | PA3540922 | NTNCWS | Orwigsburg | 31 | Schuylkill County |
| Pinecrest Village Mhp | PA4410019 | CWS | Havertown | 195 | Lycoming County |
| Pinedale Mobile Home Park | PA6200076 | CWS | Adamsville | 80 | Crawford County |
| Pinehurst Manor | PA7360092 | CWS | East Earl | 47 | Lancaster County |
| Pinehurst Manor Mhp | PA5100015 | CWS | Durham | 86 | Butler County |
| Pinehurst Mobile Estates | PA5040011 | CWS | Banner Elk | 130 | Beaver County |
| Pithole Water Association | PA6420031 | CWS | Smethport | 87 | McKean County |
| Plain & Fancy Farm | PA7360931 | NTNCWS | Ronks | 45 | Lancaster County |
| Plateau Village Mhp | PA7360072 | CWS | Lititz | 125 | Lancaster County |
| Pleasant Hall Manor | PA7280060 | CWS | Landisburg | 50 | Franklin County |
| Pleasant Run Mhp | PA1460006 | CWS | Barto | 32 | Montgomery County |
| Pleasant Valley Mennonite Sch | PA7360536 | NTNCWS | Ephrata | 135 | Lancaster County |
| Pleasant Valley Mhp | PA6620038 | CWS | Moscow | 270 | Warren County |
| Pleasant View Lakes Poa | PA2450070 | CWS | Kunkletown | 389 | Monroe County |
| Pleasant View Mhp | PA2400043 | CWS | Moscow | 99 | Luzerne County |
| Pleasant View Sch | PA4440310 | NTNCWS | Belleville | 30 | Mifflin County |
| Pleasant Village Mhp | PA2590017 | CWS | Middletown | 40 | Tioga County |
| Pleasantville Borough Water | PA6610025 | CWS | Pleasantville | 846 | Crawford County, Venango County |
| Plum Creek Municipal Auth | PA3540049 | CWS | Auburn | 2,500 | Schuylkill County |
| Plumer Water Company | PA6610011 | CWS | Dubois | 185 | Venango County |
| Plumstead Christian Lower Schl | PA1091325 | NTNCWS | Plumsteadville | 175 | Bucks County |
| Plumstead Christian Upper Schl | PA1090993 | NTNCWS | Plumsteadville | 230 | Bucks County |
| Plumstead Twp Durham Ridge | PA1090138 | CWS | Pipersville | 714 | Bucks County |
| Plumstead Twp Patriots Ridge | PA1090148 | CWS | Pipersville | 1,704 | Bucks County |
| Plumstead Twp Summer Hill Mead | PA1090157 | CWS | Pipersville | 1,284 | Bucks County |
| Plumsteadville Shopping Center | PA1091156 | NTNCWS | Huntingdon Valley | 400 | Bucks County |
| Pmsd Clear Run Campus | PA2451287 | NTNCWS | Swiftwater | 2,500 | Monroe County |
| Pmsd Sullivan Trail Jun High | PA2451377 | NTNCWS | Swiftwater | 1,000 | Monroe County |
| Pmsd Tobyhanna Elemetary Cntr | PA2450317 | NTNCWS | Swiftwater | 800 | Monroe County |
| Pmsd West High School | PA2451343 | NTNCWS | Swiftwater | 2,200 | Monroe County |
| Pnk P5 Lake Harmony Warehouse | PA3131003 | NTNCWS | New York | 110 | Carbon County |
| Poc Mtn Lake Est Sect 1E | PA2520089 | CWS | Bushkill | 140 | Pike County |
| Poco Apartments (Lower) | PA2450106 | CWS | Saylorsburg | 48 | Monroe County |
| Poco Apartments (Upper) | PA2450107 | CWS | Saylorsburg | 36 | Monroe County |
| Pocono Manor Inn | PA2450064 | CWS | Pocono Manor | 300 | Monroe County |
| Pocono Mobile Home Estates | PA2450028 | CWS | Bethlehem | 129 | Monroe County |
| Pocono Mobile Manor Mhp | PA2350056 | CWS | Morgantown | 77 | Lackawanna County |
| Pocono Mountain Recovery Ctr | PA2450595 | NTNCWS | Henryville | 72 | Monroe County |
| Pocono Mtn Lake Estates Sect5A | PA2520058 | CWS | Dingmans Ferry | 150 | Pike County |
| Pocono Organics | PA2451438 | NTNCWS | Long Pond | 60 | Monroe County |
| Pocono Plateau Park Well 1 | PA2450097 | CWS | Trumbauersville | 60 | Monroe County |
| Pocono Ranch Lands Sect 4 | PA2520054 | CWS | Bushkill | 225 | Pike County |
| Pocono Square Mall | PA2451070 | NTNCWS | Phillipsburg | 300 | Monroe County |
| Pocono Summit Plaza | PA2451002 | NTNCWS | Edison | 210 | Monroe County |
| Point Marion Boro | PA5260017 | CWS | Point Marion | 1,110 | Fayette County |
| Polk Center | PA6610010 | CWS | Polk | 1,058 | Venango County |
| Port Allegany Water Department | PA6420021 | CWS | Port Allegany | 2,591 | McKean County |
| Port Clinton Water Coop Assoc | PA3540025 | CWS | Port Clinton | 200 | Schuylkill County |
| Port Florence Development | PA2640015 | CWS | Hamlin | 100 | Wayne County |
| Port Matilda Waterworks | PA4140088 | CWS | Port Matilda | 615 | Centre County |
| Port Royal Muni Auth | PA4340010 | CWS | Port Royal | 950 | Juniata County |
| Porter Township Municipal Auth | PA4180055 | CWS | Mill Hall | 425 | Clinton County |
| Portersville Christian | PA5100405 | NTNCWS | Portersville | 221 | Butler County |
| Portico River Brethren School | PA7280955 | NTNCWS | Chambersburg | 160 | Franklin County |
| Portland Boro Authority | PA3480059 | CWS | Portland | 1,100 | Northampton County |
| Possum Valley Muni Auth | PA7010034 | CWS | Aspers | 800 | Adams County |
| Post Consumer Brands | PA4190370 | NTNCWS | Bloomsburg | 600 | Columbia County |
| Post Precision Castings Inc | PA3060871 | NTNCWS | Strausstown | 105 | Berks County |
| Pottstown Hosp Tower Health | PA1460500 | NTNCWS | Pottstown | 1,425 | Montgomery County |
| Powder Mill Works | PA6370973 | NTNCWS | New Castle | 50 | Lawrence County |
| Pp & L Honesdale Service Centr | PA2640999 | NTNCWS | Allentown | 75 | Wayne County |
| Ppl Electric Utilities Corp | PA4190999 | NTNCWS | Allentown | 70 | Columbia County |
| Ppl Quarryville Svc Ctr | PA7360933 | NTNCWS | Allentown | 40 | Lancaster County |
| Praxair Laser | PA6370974 | NTNCWS | New Castle | 25 | Lawrence County |
| Praxair Thermal | PA6370918 | NTNCWS | New Castle | 35 | Lawrence County |
| Premier Early Learning Center | PA3390976 | NTNCWS | Emmaus | 145 | Lehigh County |
| Preston Elementary School | PA2640300 | NTNCWS | Honesdale | 325 | Wayne County |
| Procter&Gamble Paper Products | PA2660380 | NTNCWS | Mehoopany | 3,200 | Wyoming County |
| Providence Elem Sch | PA7360519 | NTNCWS | Quarryville | 415 | Lancaster County |
| Providence Place Of Hazleton | PA2400146 | CWS | Drums | 140 | Luzerne County |
| Pshs Inc | PA3060319 | NTNCWS | Mohnton | 200 | Berks County |
| Psp Barracks Gettysburg | PA7011037 | NTNCWS | Dillsburg | 30 | Adams County |
| Psp Lehighton Barracks | PA3130978 | NTNCWS | Kew Gardens | 50 | Carbon County |
| Ptc Alliance | PA5040851 | NTNCWS | Darlington | 74 | Beaver County |
| Pulva Corp | PA5100982 | NTNCWS | Saxonburg | 35 | Butler County |
| Purchase Line High Sch | PA5320309 | NTNCWS | Commodore | 450 | Indiana County |
| Purchase Line South Elem Sch | PA5320310 | NTNCWS | Commodore | 499 | Indiana County |
| Pvsd Center Elementary School | PA2451243 | NTNCWS | Brodheadsville | 2,722 | Monroe County |
| Pvsd Chestnuthill Elementary | PA2450358 | NTNCWS | Brodheadsville | 272 | Monroe County |
| Pvsd High School | PA2450362 | NTNCWS | Brodheadsville | 1,640 | Monroe County |
| Pvsd Middle School | PA2451051 | NTNCWS | Brodheadsville | 890 | Monroe County |
| Pvsd Polk Elemenary School | PA2450378 | NTNCWS | Brodheadsville | 185 | Monroe County |
| Pyramid Healthcare Quakertown | PA1091362 | NTNCWS | Quakertown | 100 | Bucks County |
| Quaker View Mobile Home Park | PA1090050 | CWS | Lansdale | 60 | Bucks County |
| Quakertown Farmers Market | PA1090981 | NTNCWS | Quakertown | 2,000 | Bucks County |
| Quality Custom Kitchens | PA7360619 | NTNCWS | New Holland | 200 | Lancaster County |
| Quarryville Boro | PA7360112 | CWS | Quarryville | 3,150 | Lancaster County |
| Quarryville Presby Ret Comm | PA7360167 | CWS | Quarryville | 750 | Lancaster County |
| Quincy Twp Water System | PA7280074 | CWS | Waynesboro | 530 | Franklin County |
| Quincy Village System | PA7280025 | CWS | Waynesboro | 450 | Franklin County |
| R Own Lake Inc | PA2450010 | CWS | Stroudsburg | 30 | Monroe County |
| Rachels Roadhouse | PA6430964 | NTNCWS | Mercer | 100 | Mercer County |
| Radnor Valley Country Club | PA1230881 | NTNCWS | Villanova | 80 | Delaware County |
| Rainbow Valley Mobile Home | PA6250089 | CWS | Fairview | 300 | Erie County |
| Rainsburg Borough Water | PA4050032 | CWS | Bedford | 200 | Bedford County |
| Ralston Area Joint Authority | PA4410171 | CWS | Ralston | 400 | Lycoming County |
| Ranch House Restaurant | PA7500330 | NTNCWS | Duncannon | 250 | Perry County |
| Rar2 Bethel Industrial Center | PA3061280 | NTNCWS | Mechanicsburg | 350 | Berks County |
| Raven Rock Mountain Complex | PA7010879 | NTNCWS | Washington | 150 | Adams County |
| Rawa Berks Park 78 | PA3061223 | NTNCWS | Reading | 700 | Berks County |
| Rawa Central Logistics Park | PA3061007 | NTNCWS | Reading | 100 | Berks County |
| Rawa Core 5 Logistics Center | PA3061292 | NTNCWS | Reading | 100 | Berks County |
| Rawa North Heidelberg | PA3060115 | CWS | Reading | 1,350 | Berks County |
| Ray Price Motors Snydersville | PA2451428 | NTNCWS | Stroudsburg | 50 | Monroe County |
| Ray Price Mount Pocono | PA2451413 | NTNCWS | Radnor | 40 | Monroe County |
| Rayburn Twp Joint Muni Auth | PA5030020 | CWS | Kittanning | 460 | Armstrong County |
| Raymond Drive Water Company | PA6200079 | CWS | Cochranton | 104 | Crawford County |
| Rb Walter & Williamson Schools | PA2590315 | NTNCWS | Elkland | 1,400 | Tioga County |
| Rbe Water Association Inc | PA2350033 | CWS | Roaring Brook Twp | 175 | Lackawanna County |
| Reade Twp Muni Auth | PA4110297 | CWS | Glasgow | 1,746 | Cambria County |
| Reading Alloys | PA3060868 | NTNCWS | Robesonia | 135 | Berks County |
| Reading Truck Body | PA7361117 | NTNCWS | Bowmansville | 25 | Lancaster County |
| Red Cliff Mhp | PA1090048 | CWS | Ferndale | 30 | Bucks County |
| Red Hill Water Authority | PA1460039 | CWS | East Greenville | 2,500 | Lehigh County, Montgomery County |
| Red Rock Job Corps Center | PA2570005 | CWS | Lopez | 425 | Sullivan County |
| Redbank Valley Mun Auth | PA6160010 | CWS | New Bethlehem | 3,150 | Armstrong County, Clarion County |
| Redwood Estates Pa Llc | PA5020084 | CWS | Farmington Hills | 725 | Allegheny County |
| Regal Fountain House | PA6200044 | CWS | Ramsey | 125 | Crawford County |
| Regency Woods Mhp | PA7210057 | CWS | Mechanicsburg | 450 | Cumberland County |
| Rehrersburg Christian School | PA3060517 | NTNCWS | Richland | 100 | Berks County |
| Reserve And Ridge At Hilltown | PA1090162 | CWS | Sellersville | 300 | Bucks County |
| Rest Assured Assisted Living | PA4560016 | CWS | Meyersdale | 70 | Somerset County |
| Restless Oaks Village Mhp | PA7670041 | CWS | Holtwood | 52 | York County |
| Retreat Village | PA3540058 | CWS | New Ringgold | 80 | Schuylkill County |
| Revere Tavern | PA7360350 | NTNCWS | Paradise | 730 | Lancaster County |
| Rew Water Association | PA6420013 | CWS | Smethport | 325 | McKean County |
| Reynolds Water Company | PA6430057 | CWS | Greenville | 2,370 | Mercer County |
| Reynoldsville Water Auth | PA6330011 | CWS | Reynoldsville | 2,908 | Jefferson County |
| Rice Elementary School | PA2400460 | NTNCWS | Mountain Top | 838 | Luzerne County |
| Rice Fruit Co | PA7010983 | NTNCWS | Gardners | 177 | Adams County |
| Rich Valley Golf Course | PA7210318 | NTNCWS | Mechanicsburg | 300 | Cumberland County |
| Richfield Area Joint Auth | PA4340009 | CWS | Richfield | 1,000 | Juniata County, Snyder County |
| Richland Boro Water Supply | PA7380032 | CWS | Richland | 1,700 | Lebanon County |
| Richland Meadows Mhp | PA1090052 | CWS | Quakertown | 750 | Bucks County |
| Richlandtown Water Department | PA1090057 | CWS | Richlandtown | 1,450 | Bucks County |
| Richmond Center Ymca | PA3060346 | NTNCWS | Reading | 100 | Berks County |
| Ridge Crest Mhp | PA4140124 | CWS | Morgantown | 300 | Centre County |
| Ridge On The Commons | PA7360182 | CWS | Quarryville | 30 | Lancaster County |
| Ridge View Personal Care Home | PA4070054 | CWS | Hollidaysburg | 35 | Blair County |
| Ridgebury Mobile Manor | PA2080023 | CWS | Dresher | 23 | Bradford County |
| Ridgecrest | PA2451231 | NTNCWS | Stroudsburg | 55 | Monroe County |
| Ridgeview Mhp | PA1150200 | CWS | Rising Sun | 55 | Chester County |
| Ridgeview Mhp & Apts | PA7380034 | CWS | Elizabethtown | 30 | Lebanon County |
| Ridgewood Manor Mhp | PA7360079 | CWS | Farmington Hills | 314 | Lancaster County |
| Ridglea | PA1150215 | CWS | Pottstown | 900 | Chester County |
| Ridgway Twp Water Auth | PA6240022 | CWS | Ridgway | 1,763 | Elk County |
| Riegelsville Water Authority | PA1090058 | CWS | Riegelsville | 980 | Bucks County |
| Rimersburg Boro Muni Auth | PA6160012 | CWS | Rimersburg | 1,873 | Clarion County |
| Rimrock State Police Barracks | PA2451426 | NTNCWS | Bartonsville | 50 | Monroe County |
| Ringtown Boro Water Department | PA3540039 | CWS | Ringtown | 823 | Schuylkill County |
| Rittenhouse Place | PA2400925 | NTNCWS | Chappaqua | 647 | Luzerne County |
| River Rock Newville | PA7210331 | NTNCWS | Newville | 88 | Cumberland County |
| River Valley Waldorf School | PA1091298 | NTNCWS | Upper Black Eddy | 170 | Bucks County |
| Riveredge Rentals | PA1150190 | CWS | Havertown | 80 | Chester County |
| Riversedge | PA3480035 | CWS | Bangor | 75 | Northampton County |
| Riverview Estates | PA3390018 | CWS | Skokie | 375 | Lehigh County |
| Rixford Waterworks Association | PA6420022 | CWS | Rixford | 234 | McKean County |
| Roaring Branch Waterworks | PA4410182 | CWS | Roaring Branch | 90 | Lycoming County, Tioga County |
| Roaring Spring Muni Water Auth | PA4070019 | CWS | Roaring Spring | 3,182 | Blair County |
| Robinsons Mobile Home Park | PA5100055 | CWS | Prospect | 30 | Butler County |
| Robinwood Village | PA2450140 | CWS | Saylorsburg | 70 | Monroe County |
| Rock Spring Water Co | PA4140085 | CWS | Pennsylvania Furnace | 1,212 | Centre County |
| Rockstart Early Learning Cntr | PA7220475 | NTNCWS | Halifax | 85 | Dauphin County |
| Rocky Ridge Mobile Home Park | PA2450129 | CWS | East Stroudsburg | 171 | Monroe County |
| Rocky Ridge Village | PA6610032 | CWS | Franklin | 150 | Venango County |
| Rodale Institute | PA3061112 | NTNCWS | Kutztown | 55 | Berks County |
| Rodeway Inn | PA6430820 | NTNCWS | Mercer | 68 | Mercer County |
| Rohrer Bus Svc | PA7500874 | NTNCWS | Duncannon | 90 | Perry County |
| Rohrers Quarry | PA7360571 | NTNCWS | Lititz | 56 | Lancaster County |
| Rolling Hills Estates | PA7210013 | CWS | Carlisle | 175 | Cumberland County |
| Rolling Hills Manor | PA4600005 | CWS | Millmont | 64 | Union County |
| Rolling Hills Mhp | PA7360010 | CWS | Camp Hill | 150 | Lancaster County |
| Rolling Rock Building Stone | PA3061215 | NTNCWS | Boyertown | 40 | Berks County |
| Rolling Valley Estates | PA5100009 | CWS | Durham | 180 | Butler County |
| Roman Delight Iii | PA3540840 | NTNCWS | Orwigsburg | 160 | Schuylkill County |
| Romar Village | PA6430064 | CWS | Linesville | 75 | Crawford County |
| Rosebud Barrett Mine | PA5320382 | NTNCWS | Kittaning | 65 | Indiana County |
| Ross Elementary School | PA2400374 | NTNCWS | Lehman | 130 | Luzerne County |
| Rote Mutual Water Association | PA4180064 | CWS | Mill Hall | 481 | Clinton County |
| Roulette Twp Water Authority | PA6530007 | CWS | Roulette | 1,300 | Potter County |
| Round Top Mhp | PA7010046 | CWS | Durham | 185 | Adams County |
| Rouseville Mun Waterworks | PA6610028 | CWS | Rouseville | 500 | Venango County |
| Route 322 Mobile Home Park | PA6430019 | CWS | Hermitage | 53 | Mercer County |
| Royal Oaks Mhp | PA3480044 | CWS | Bath | 85 | Northampton County |
| Royalton Boro | PA7220045 | CWS | Royalton | 1,083 | Dauphin County |
| Rural Solution W3 Llc | PA6200040 | CWS | Meadville | 38 | Crawford County |
| Rural Valley Water Works | PA5030012 | CWS | Rural Valley | 1,000 | Armstrong County |
| Rustic Acres Mhp | PA2520042 | CWS | Elizabethtown | 73 | Pike County |
| Rutters 92 | PA3060945 | NTNCWS | York | 1,000 | Berks County |
| Rutters Farm Store 77 | PA7220450 | NTNCWS | York | 1,600 | Dauphin County |
| Ryan Hill Development | PA2640050 | CWS | Hamlin | 75 | Wayne County |
| S Huntingdon County Schl Dist | PA4310323 | NTNCWS | Three Springs | 865 | Huntingdon County |
| S R Water | PA3130053 | CWS | Lake Harmony | 500 | Carbon County |
| Saddleview Water Llc | PA2660950 | CWS | Tunkhannock | 233 | Wyoming County |
| Saegertown Borough | PA6200043 | CWS | Saegertown | 1,500 | Crawford County |
| Saegertown Elem And High Sch | PA6200310 | NTNCWS | Saegertown | 1,375 | Crawford County |
| Saegertown Mhp | PA6200049 | CWS | Oveido | 200 | Crawford County |
| Safe Harbor Power Corp | PA7360136 | NTNCWS | Conestoga | 50 | Lancaster County |
| Sage Run Dist | PA6610039 | CWS | Seneca | 205 | Venango County |
| Saint Boniface School | PA6250340 | NTNCWS | Erie | 30 | Erie County |
| Saint Francis University | PA4110800 | CWS | Loretto | 2,072 | Cambria County |
| Saint Luke Knolls | PA1460086 | CWS | Gilbertsville | 50 | Montgomery County |
| Saint Tikhons Seminary | PA2640336 | NTNCWS | South Canaan | 90 | Wayne County |
| Salem Christian School | PA3390920 | NTNCWS | Macungie | 220 | Lehigh County |
| Salem Heights Estate | PA2640054 | CWS | Lake Ariel | 62 | Wayne County |
| Salemville Water Assn | PA4050034 | CWS | New Enterprise | 115 | Bedford County |
| Salford Hills Elem School | PA1460375 | NTNCWS | Souderton | 500 | Montgomery County |
| Salford Mennonite Child Care | PA1460494 | NTNCWS | Harleysville | 200 | Montgomery County |
| Salisbury Boro Water Comm | PA4560041 | CWS | Salisbury | 725 | Somerset County |
| Salisbury Elem Sch | PA7360948 | NTNCWS | Kinzers | 425 | Lancaster County |
| Saltillo Muni Water Works | PA4310026 | CWS | Saltillo | 350 | Huntingdon County |
| Sandy Hill Estates | PA5100018 | CWS | Durham | 325 | Butler County |
| Sandy Hill Preschool | PA1150777 | NTNCWS | Coatesville | 140 | Chester County |
| Sandy Lake Boro | PA6430052 | CWS | Sandy Lake | 1,100 | Mercer County |
| Sandy Run Assoc | PA2400136 | CWS | Freeland | 47 | Luzerne County |
| Sandy Township | PA6170053 | CWS | Dubois | 1,828 | Clearfield County |
| Sandycreek Twp Waterworks | PA6610042 | CWS | Franklin | 2,417 | Venango County |
| Sankertown Boro Water Sys | PA4110007 | CWS | Cresson | 760 | Cambria County |
| Saw Mill Road Office Bldg | PA4190906 | NTNCWS | Bloomsburg | 150 | Columbia County |
| Sawmill Plaza | PA2451421 | NTNCWS | East Stroudsburg | 40 | Monroe County |
| Saxton Muni Water Auth | PA4050021 | CWS | Saxton | 1,675 | Bedford County |
| Sbwja Grove Park | PA4140133 | CWS | Bellefonte | 185 | Centre County, Mifflin County |
| Sbwja Hampton Hills Opequon | PA4140131 | CWS | Bellefonte | 684 | Centre County |
| Scenic Mobile Home Park | PA6430001 | CWS | Dalton | 50 | Mercer County |
| Scenic View | PA7360021 | CWS | Gap | 45 | Lancaster County |
| Scenic View Apartments | PA1090135 | CWS | Hellertown | 150 | Bucks County, Northampton County |
| Scenic View Personal Care Home | PA3130991 | NTNCWS | Palmerton | 25 | Carbon County |
| Schnecksville Plaza | PA3390858 | NTNCWS | Williamsport | 130 | Lehigh County |
| Scholars In Training Preschool | PA2350353 | NTNCWS | Scott Township | 65 | Lackawanna County |
| Schoolhouse Apts | PA7360029 | CWS | Columbia | 38 | Lancaster County |
| Schoolhouse Hill Apts | PA2660050 | CWS | Montrose | 38 | Wyoming County |
| Schuylkill Center For Env Edu | PA1510800 | NTNCWS | Philadelphia | 100 | Philadelphia County |
| Sci Dallas | PA2400090 | CWS | Dallas | 2,900 | Luzerne County |
| Sciota Gardens | PA2450143 | CWS | Stroudsburg | 50 | Monroe County, Pike County |
| Scma Orwigsburg Consecutive | PA3540075 | CWS | Pottsville | 500 | Schuylkill County |
| Scma Pine Grove Township | PA3540062 | CWS | Pottsville | 260 | Schuylkill County |
| Scma Pinebrook | PA3540054 | CWS | Pottsville | 735 | Schuylkill County |
| Scma-Tremont | PA3540046 | CWS | Pottsville | 2,515 | Schuylkill County |
| Scotts Oxford | PA1150334 | NTNCWS | Oxford | 70 | Chester County |
| Scottys Manufactured Homes | PA3480040 | CWS | Center Valley | 67 | Northampton County |
| Scrubgrass Generating Plant | PA6610858 | NTNCWS | Kennerdell | 35 | Venango County |
| Seeds Of Faith Christian Acade | PA5320302 | NTNCWS | Creekside | 200 | Indiana County |
| Seeds To Saplings | PA2521037 | NTNCWS | Greentown | 50 | Pike County |
| Selinsgrove Center | PA4550800 | CWS | Selinsgrove | 1,000 | Snyder County |
| Seven Fields Boro Water Dept | PA5100135 | CWS | Seven Fields | 3,100 | Butler County |
| Seven Hills Mhp | PA2080011 | CWS | Rome | 65 | Bradford County |
| Sgl Carbon Group Llc | PA3061175 | NTNCWS | Sinking Spring | 41 | Berks County |
| Shady Back Acres Mhp | PA7220016 | CWS | Morgantown | 40 | Dauphin County |
| Shady Grove Christian School | PA4600304 | NTNCWS | Mifflinburg | 90 | Union County |
| Shady Grove Mennonite Sch | PA7280322 | NTNCWS | Greencastle | 155 | Franklin County |
| Shady Grove Mobile Home Park | PA1150145 | CWS | New London | 129 | Chester County |
| Shady Lane Home Park | PA2580022 | CWS | Meshoppen | 40 | Susquehanna County |
| Shady Lane Realty Acker Drill | PA2350405 | NTNCWS | Scranton | 50 | Lackawanna County |
| Shady Maple | PA7361003 | NTNCWS | East Earl | 2,100 | Lancaster County |
| Shalako Run Mhp | PA7670034 | CWS | Silver Spring | 125 | York County |
| Shalmet Corporation | PA3540468 | NTNCWS | Orwigsburg | 110 | Schuylkill County |
| Shamokin Dam Borough | PA4550022 | CWS | Shamokin Dam | 1,700 | Northumberland County, Snyder County |
| Shangri La Mhp | PA7280017 | CWS | Greencastle | 86 | Franklin County |
| Shanksville Stonycreek Sch | PA4560327 | NTNCWS | Shanksville | 460 | Somerset County |
| Shawnee Mountain Ski Area | PA2450739 | NTNCWS | Shawnee On Delaware | 1,500 | Monroe County |
| Shawville Power Llc | PA6170333 | NTNCWS | Shawville | 28 | Clearfield County |
| Sheetz #246 | PA6370957 | NTNCWS | Altoona | 250 | Lawrence County |
| Sheetz 121 Harrisville | PA5100839 | NTNCWS | Claysburg | 150 | Butler County |
| Sheetz 461 | PA7220937 | NTNCWS | Claysburg | 1,100 | Dauphin County |
| Sheetz 656 Lantz Corners | PA6420855 | NTNCWS | Altoona | 400 | McKean County |
| Sheffield Twp Municipal Auth | PA6620031 | CWS | Sheffield | 1,075 | Warren County |
| Shermans Valley Apts Perlo Iii | PA7500017 | CWS | Loysville | 45 | Perry County |
| Shinglehouse Boro Water Dept | PA6530013 | CWS | Shinglehouse | 1,250 | Potter County |
| Shippingport Boro Water Sys | PA5040086 | CWS | Shippingport | 222 | Beaver County |
| Shirleysburg Muni Auth | PA4310027 | CWS | Shirleysburg | 225 | Huntingdon County |
| Shoemakersville Boro Water Sys | PA3060100 | CWS | Shoemakersville | 2,150 | Berks County |
| Shohola Falls Trail End Sys#1 | PA2520810 | NTNCWS | Shohola | 850 | Pike County |
| Short Mountain Village Mhp | PA7220048 | CWS | Mount Freedom | 53 | Dauphin County |
| Sicklers Mhp | PA2660054 | CWS | Tunkhannock | 30 | Wyoming County |
| Sideling Hill Travel Plaza | PA4290808 | NTNCWS | Glen Rock | 900 | Fulton County |
| Signode Industrial Group Llc | PA2640896 | NTNCWS | South Canaan | 90 | Wayne County |
| Silver Spring Country Estates | PA7210068 | CWS | Mechanicsburg | 110 | Cumberland County |
| Silver Spring Presb | PA7210946 | NTNCWS | Mechanicsburg | 70 | Cumberland County |
| Silver Spring Water Assn | PA7280061 | CWS | Chambersburg | 130 | Franklin County |
| Sittlers Mhp | PA3060044 | CWS | Lansdale | 89 | Berks County |
| Sk Properties Lp Misty Meadows | PA3060131 | CWS | Exton | 60 | Berks County |
| Ski Liberty | PA7010348 | NTNCWS | Carroll Valley | 1,000 | Adams County |
| Ski Side Village | PA2450931 | NTNCWS | Stroudsburg | 200 | Monroe County |
| Sky View Terrace | PA5040056 | CWS | Durham | 50 | Beaver County |
| Skytop Lodge Inc | PA2450040 | CWS | Skytop | 300 | Monroe County |
| Skyview Gardens Apts | PA7500024 | CWS | Olyphant | 234 | Perry County |
| Slate Ridge Mennonite Sch | PA7210359 | NTNCWS | Carlisle | 100 | Cumberland County |
| Slm Facility Solutions | PA1461203 | NTNCWS | Green Lane | 45 | Montgomery County |
| Small World Day Care Center | PA3130879 | NTNCWS | Lehighton | 70 | Carbon County |
| Smethport Borough | PA6420023 | CWS | Smethport | 2,400 | McKean County |
| Smithfield Court | PA2450004 | CWS | East Stroudsburg | 50 | Monroe County |
| Smithville Mhp | PA7360121 | CWS | Coatesville | 166 | Lancaster County |
| Snake Spring Township Ma | PA4050038 | CWS | Everett | 750 | Bedford County |
| Sol Feinstone Elem School | PA1091107 | NTNCWS | Newtown | 900 | Bucks County |
| Solanco High Sch | PA7360520 | NTNCWS | Quarryville | 1,460 | Lancaster County |
| Soldier Water System | PA6330020 | CWS | Reynoldsville | 250 | Jefferson County |
| Solebury School | PA1090030 | CWS | New Hope | 300 | Bucks County |
| Somers Lane Mhp | PA2590008 | CWS | Montandon | 130 | Tioga County |
| Somerset Christian School | PA4560353 | NTNCWS | Somerset | 150 | Somerset County |
| Somerset Cnty Quemahoning Syst | PA4560009 | CWS | Somerset | 25 | Somerset County |
| Somerset Estates Mhp | PA4560003 | CWS | Morgantown | 300 | Somerset County |
| Somerset Twp M A Friedens | PA4560057 | CWS | Somerset | 1,374 | Somerset County |
| Somerset Twp Ma Reading Mines | PA4560019 | CWS | Somerset | 494 | Somerset County |
| Somerset Twp Mun Auth Listie | PA4560002 | CWS | Somerset | 218 | Somerset County |
| South Buffalo Twp Muni Auth | PA5030049 | CWS | Freeport | 1,230 | Armstrong County |
| South Eastern Middle Sch | PA7671295 | NTNCWS | Fawn Grove | 420 | York County |
| South Fulton Elem Sch | PA4290818 | NTNCWS | Warfordsburg | 499 | Fulton County |
| South Fulton Jr/Sr High Sch | PA4290331 | NTNCWS | Warfordsburg | 400 | Fulton County |
| South Mountain Restoration Ctr | PA7280042 | CWS | South Mountain | 950 | Franklin County |
| South Park Mhc Llc | PA5630077 | CWS | Farmington Hills | 740 | Washington County |
| South Pymatuning | PA6430077 | CWS | Sharpsville | 641 | Mercer County |
| South Side Sch | PA5040371 | NTNCWS | Hookstown | 1,400 | Beaver County |
| Southampton Manor Mhp | PA7210066 | CWS | Carlisle | 160 | Cumberland County |
| Southeastern Intermediate Sch | PA7671310 | NTNCWS | Fawn Grove | 420 | York County |
| Southern Columbia Area School | PA4190360 | NTNCWS | Catawissa | 1,650 | Columbia County |
| Southern Cumberland Water Assn | PA7210053 | CWS | Shippensburg | 400 | Cumberland County |
| Southern Lycoming County Water | PA4411014 | NTNCWS | Montgomery | 75 | Lycoming County |
| Southern York Co Sch Dist | PA7671312 | NTNCWS | Glen Rock | 2,312 | York County |
| Southland Hills Mobile Homes | PA7360103 | CWS | Willow Street | 96 | Lancaster County |
| Southmill Champs | PA1150872 | NTNCWS | Kennett Square | 100 | Chester County |
| Southpoint Homeowners Assoc | PA1230026 | CWS | Lima | 40 | Delaware County |
| Southside Northside Water Assn | PA6420028 | CWS | Ludlow | 72 | McKean County |
| Southwest Warren Co Mun Auth | PA6620032 | CWS | Tidioute | 1,040 | Warren County |
| Sparrow Pond Camp Ground | PA6250988 | NTNCWS | Waterford | 200 | Erie County |
| Specialty Granules Inc | PA7010375 | NTNCWS | Blue Ridge Summit | 151 | Adams County |
| Spring Glen Farm Kitchen | PA7360538 | NTNCWS | Ephrata | 103 | Lancaster County |
| Spring Lake Park | PA7360076 | CWS | Newmanstown | 35 | Lancaster County |
| Spring Run Estates Wtp | PA1150216 | CWS | Coatesville | 450 | Chester County |
| Spring Twp Municipal Authority | PA4550011 | CWS | Beaver Springs | 805 | Snyder County |
| Spring Valley | PA5260043 | CWS | Farmington | 250 | Fayette County |
| Springboro Area Water Auth | PA6200050 | CWS | Springboro | 1,175 | Crawford County |
| Springdale Gardens | PA3130035 | CWS | Olyphant | 41 | Carbon County, Schuylkill County |
| Springfield Elem School | PA1091097 | NTNCWS | Kintnersville | 251 | Bucks County |
| Springfield Village | PA6250005 | CWS | Fairview | 80 | Erie County |
| Springhill Mobile Home Park | PA3130017 | CWS | Morgantown | 130 | Carbon County |
| Springton Manor Elementary | PA1150791 | NTNCWS | Downingtown | 600 | Chester County |
| Springtown Water Authority | PA1090064 | CWS | Springtown | 600 | Bucks County |
| Springville Mennonite School | PA7360347 | NTNCWS | Ephrata | 167 | Lancaster County |
| Sproul Water Assn | PA4070047 | CWS | Sproul | 180 | Blair County |
| Spruce Court Apartments | PA1460071 | CWS | Jenkintown | 139 | Montgomery County |
| Spruce Lake Retreat Center | PA2451058 | NTNCWS | Canadensis | 277 | Monroe County |
| Sru Harrisville | PA5100320 | NTNCWS | Slippery Rock | 75 | Butler County |
| Sru Middle School | PA2080357 | NTNCWS | Athens | 400 | Bradford County |
| St Nicholas Catholic School | PA4110308 | NTNCWS | Nicktown, | 150 | Cambria County |
| St Clairsville Water Company | PA4050036 | CWS | Osterburg | 392 | Bedford County |
| St Cornelius Rcc School Bldg | PA1230361 | NTNCWS | Chadds Ford | 300 | Delaware County |
| St Correct Inst Huntingdon | PA4310028 | CWS | Huntingdon | 2,200 | Huntingdon County |
| St John The Baptist School | PA1091308 | NTNCWS | Ottsville | 120 | Bucks County |
| St Johns | PA2640884 | NTNCWS | Honesdale | 270 | Wayne County |
| St Joseph Institute | PA4140908 | NTNCWS | Port Matilda | 109 | Centre County |
| St Josephs Hill Church | PA3060825 | NTNCWS | Boyertown | 75 | Berks County |
| St Louis De Montfort Academy | PA4490835 | NTNCWS | Herndon | 66 | Northumberland County |
| St Lukes School | PA5100976 | NTNCWS | Cabot | 200 | Butler County |
| St Mary Of Providence Center | PA1150029 | CWS | Elverson | 75 | Chester County |
| St Marys Villa Nursing Home | PA2350051 | CWS | Elmhurst Township | 353 | Lackawanna County |
| St Matthews School | PA1150326 | NTNCWS | Chester Springs | 190 | Chester County |
| St Michaels Archangel School | PA3390815 | NTNCWS | Coopersburg | 250 | Lehigh County |
| St Paul Homes | PA6430024 | CWS | Greenville | 1,000 | Mercer County |
| St Pauls Luth Ch | PA1460437 | NTNCWS | Sassamansville | 100 | Montgomery County |
| St Pauls Lutheran Church | PA2401038 | NTNCWS | Dallas | 200 | Luzerne County |
| St Petersburg Municipal Water | PA6160013 | CWS | St Petersburg | 465 | Clarion County |
| St Stephens Academy Utica | PA6610346 | NTNCWS | Zelienople | 55 | Venango County |
| St Wendelin Church & School | PA5100988 | NTNCWS | Butler | 620 | Butler County |
| Stanton Hills Community | PA5650021 | CWS | Durham | 100 | Westmoreland County |
| Star Plaza | PA3390984 | NTNCWS | Allentown | 250 | Lehigh County |
| Starn Tool & Manufacturing Co | PA6201123 | NTNCWS | Meadville | 50 | Crawford County |
| State Line Mhp | PA7280015 | CWS | Greencastle | 65 | Franklin County |
| State Line Muni Svcs Auth | PA5260035 | CWS | Point Marion | 95 | Fayette County, Greene County |
| Steel Fab Enterprises | PA7360402 | NTNCWS | Lancaster | 70 | Lancaster County |
| Sterling Business Park | PA2641033 | NTNCWS | Honesdale | 25 | Wayne County |
| Sterling Sewer And Water Co | PA2640523 | NTNCWS | Scranton | 903 | Wayne County |
| Stone Barn Rentals | PA1150204 | CWS | Kennett Square | 120 | Chester County |
| Stone Valley Comm Charter Schl | PA4310331 | NTNCWS | Huntingdon | 110 | Huntingdon County |
| Stoneboro Water Works | PA6430056 | CWS | Stoneboro | 956 | Mercer County |
| Stonebridge Gardens Mhp | PA4560006 | CWS | Friedens | 75 | Somerset County |
| Stonebridge Health & Rehab Ctr | PA7500035 | CWS | Duncannon | 60 | Perry County |
| Stoneworth Apts Wtp | PA5100145 | CWS | Carlisle | 150 | Butler County |
| Stoney Run Apt | PA7670128 | CWS | Harrisburg | 40 | York County |
| Stoneyhill Mhp | PA7360050 | CWS | Parkesburg | 124 | Lancaster County |
| Stony Brook Circle Mhp | PA4190020 | CWS | Morgantown | 272 | Columbia County |
| Strait Steel Inc | PA7280927 | NTNCWS | Greencastle | 50 | Franklin County |
| Strasburg Muni Water Auth | PA7360118 | CWS | Strasburg | 3,100 | Lancaster County |
| Strasburg Pallet Company | PA7360757 | NTNCWS | Strasburg | 50 | Lancaster County |
| Strausstown Community Campus | PA3060348 | NTNCWS | Bernville | 130 | Berks County |
| Stroud Water Research Center | PA1150306 | NTNCWS | Avondale | 44 | Chester County |
| Suburban Propane Telford | PA1091396 | NTNCWS | Telford | 60 | Bucks County |
| Success Rehabilitation | PA1090149 | NTNCWS | Quakertown | 90 | Bucks County |
| Suez Water Kensington System | PA7280064 | CWS | Harrisburg | 204 | Franklin County |
| Sugar Creek Care Center | PA6610002 | CWS | Franklin | 356 | Venango County |
| Sugar Creek Resthome | PA5030034 | CWS | Worthington | 323 | Armstrong County |
| Sugar Grove Free Methodist Ch | PA6620347 | NTNCWS | Sugar Grove | 100 | Warren County |
| Sugarcreek Borough | PA6610044 | CWS | Franklin | 1,000 | Venango County |
| Sugarcreek Mhp | PA6200006 | CWS | Cochranton | 56 | Crawford County |
| Sugarcreek Water Co | PA6610029 | CWS | Dubois | 205 | Venango County |
| Sullivan Trail Village | PA2450136 | CWS | Easton | 45 | Monroe County |
| Summerville Boro Mun Auth | PA6330012 | CWS | Summerville | 700 | Jefferson County |
| Summit Estates | PA6430074 | CWS | Saxonburg | 72 | Mercer County |
| Summit Hill Water Authority | PA3130013 | CWS | Summit Hill | 2,890 | Carbon County |
| Summit Int School Of Ministry | PA7381056 | NTNCWS | Grantville | 130 | Lebanon County |
| Sun Dial Village Mhp | PA5650017 | CWS | Blairsville | 90 | Westmoreland County |
| Sunbury Animal Hospital | PA4490304 | NTNCWS | Sunbury | 45 | Northumberland County |
| Sunflower Sprouts Learning Ctr | PA2400414 | NTNCWS | Harveys Lake | 39 | Luzerne County |
| Sunny Acres Mobilehome Park | PA6250023 | CWS | Brandon | 60 | Erie County |
| Sunny Crest Home | PA7360061 | CWS | Morgantown | 71 | Lancaster County |
| Sunny Day Childcare | PA2451443 | NTNCWS | Stroudsburg | 50 | Monroe County |
| Sunny Spot Apartments | PA7280071 | CWS | Greencastle | 27 | Franklin County |
| Sunnydale Subdivision | PA6250074 | CWS | Fairview | 60 | Erie County |
| Sunnyview Mobile Home Park | PA6430003 | CWS | Transfer | 88 | Mercer County |
| Sunrise Lake Section 9 | PA2520091 | CWS | Moscow | 125 | Pike County |
| Sunrise Lakes Sec 12 | PA2520092 | CWS | Moscow | 125 | Pike County |
| Sunrise Terrace Mobile Home Pk | PA2640004 | CWS | Morgantown | 144 | Wayne County |
| Sunrise Trailer Ct | PA7380014 | CWS | Lebanon | 200 | Lebanon County |
| Sunset Mobile Home Park | PA2350019 | CWS | Ransom Twp | 150 | Lackawanna County |
| Sunset Ridge Rehab Ctr | PA4190026 | CWS | Bloomsburg | 60 | Columbia County |
| Sunshine Hills Water Co | PA7500015 | CWS | Duncannon | 248 | Perry County |
| Susquehanna County 911 Emcc | PA2580911 | NTNCWS | New Milford | 54 | Susquehanna County |
| Susquehanna Division Serv Pp&L | PA4410999 | NTNCWS | Allentown | 100 | Lycoming County |
| Susquehanna Steam Electric St | PA2400994 | NTNCWS | Berwick | 1,000 | Luzerne County |
| Susquenita Sch Dist | PA7500312 | NTNCWS | Duncannon | 2,300 | Perry County |
| Sutton Mhp | PA5100140 | CWS | Butler | 96 | Butler County |
| Sweet Valley Mhc | PA2400060 | CWS | Milford | 60 | Luzerne County |
| Swift Middle Sch | PA7360521 | NTNCWS | Quarryville | 1,200 | Lancaster County |
| Swt Allentown Cons System | PA3390087 | CWS | Allentown | 1,300 | Lehigh County |
| Sykesville Borough | PA6330013 | CWS | Sykesville | 1,500 | Jefferson County |
| Symba Capital Llc | PA2660811 | NTNCWS | Tunkhannock | 1,000 | Wyoming County |
| T & J Valley View Mhp | PA7280047 | CWS | Chambersburg | 130 | Franklin County |
| T J Rockwells American Grill | PA7210859 | NTNCWS | Lebanon | 250 | Cumberland County |
| T&T Mhp | PA3540073 | CWS | Pine Grove | 40 | Schuylkill County |
| Talen Energy | PA4470301 | NTNCWS | Washingtonville | 250 | Montour County |
| Tall Timbers Village M H P | PA2350012 | CWS | Brick | 275 | Lackawanna County |
| Tamarack & Spread Eagle Mhp | PA7360109 | CWS | Lancaster | 300 | Lancaster County |
| Tamiment Resort | PA2520070 | CWS | Tobyhanna | 1,200 | Pike County |
| Taylors Mobile Home Park | PA1150015 | CWS | Coatesville | 50 | Chester County |
| Teakettle Run Water Auth | PA4110001 | CWS | Nicktown | 92 | Cambria County |
| Teddy Bear Day Care | PA3480347 | NTNCWS | Walnutport | 45 | Northampton County |
| Teen Challenge Trng Ctr | PA3060064 | CWS | Rehrersburg | 300 | Berks County |
| Tel Hai Retirement Community | PA1150044 | CWS | Honey Brook | 930 | Chester County |
| Templeton Water Co | PA5030016 | CWS | Templeton | 451 | Armstrong County |
| Terrace Hill Mhp | PA2580040 | CWS | Tunkhannock | 90 | Susquehanna County |
| Terre Hill Borough | PA7360119 | CWS | East Earl | 1,295 | Lancaster County |
| Terre Hill Mennonite High Sch | PA7360528 | NTNCWS | Terre Hill | 250 | Lancaster County |
| Terryhill Estates Mhp | PA3390031 | CWS | Annville | 90 | Lehigh County |
| The Acorns Llc | PA3060015 | CWS | Morgantown | 50 | Berks County |
| The Bug Company | PA3480350 | NTNCWS | Hellertown | 30 | Northampton County |
| The Country Club Of Scranton | PA2350834 | NTNCWS | Clarks Summit | 100 | Lackawanna County |
| The Dime Bank | PA2640548 | NTNCWS | Honesdale | 65 | Wayne County |
| The Escape | PA2520036 | CWS | Greentown | 1,100 | Pike County |
| The Gardens At Orangeville | PA4190285 | CWS | Orangeville | 118 | Columbia County |
| The Institutes | PA1150809 | NTNCWS | Malvern | 200 | Chester County |
| The Meadows | PA4140122 | NTNCWS | Centre Hall | 289 | Centre County |
| The Orchard At Airport Road | PA3480013 | CWS | Bath | 37 | Northampton County |
| The Pines At West Penn | PA3540061 | CWS | New Ringgold | 466 | Schuylkill County |
| The Ranch | PA7670943 | NTNCWS | Wrightsville | 80 | York County |
| The Stanley Center | PA4190316 | NTNCWS | Bloomsburg | 70 | Columbia County |
| The Surgery Center | PA4190816 | NTNCWS | Bloomsburg | 70 | Columbia County |
| The Valley Mhc | PA6620043 | CWS | Warren | 37 | Warren County |
| The Village Center | PA2640882 | NTNCWS | Sunbury | 100 | Wayne County |
| Thermo Fisher Scientific | PA7220490 | NTNCWS | Millersburg | 800 | Dauphin County |
| Thomas Jefferson Univ Hospital | PA1510301 | NTNCWS | Philadelphia | 1,000 | Philadelphia County |
| Thompsontown Muni Auth | PA4340007 | CWS | Thompsontown | 1,000 | Juniata County |
| Three Springs Boro Water Co | PA4310030 | CWS | Three Springs | 442 | Huntingdon County |
| Tiadaghton View Mhp | PA4410164 | CWS | Morgantown | 175 | Lycoming County |
| Tiffany Pines | PA2580048 | CWS | Montrose | 150 | Susquehanna County |
| Tilden Elem Sch | PA3060349 | NTNCWS | Hamburg | 580 | Berks County |
| Timber Rise Llc | PA2450104 | CWS | East Stroudsburg | 60 | Monroe County |
| Timber Service Corp | PA7380022 | CWS | Mount Gretna | 50 | Lebanon County |
| Timber Villa | PA7360051 | CWS | Elizabethtown | 140 | Lancaster County |
| Tinicum Elementary School | PA1091299 | NTNCWS | Kintnersville | 156 | Bucks County |
| Tiny Steps Learning Center | PA2640560 | NTNCWS | Honesdale | 80 | Wayne County |
| Tioga Boro Municipal Authority | PA2590031 | CWS | Tioga | 615 | Tioga County |
| Tioga Mobile Home Community | PA2590053 | CWS | Randolph | 200 | Tioga County |
| Tionesta Borough Water Supply | PA6270001 | CWS | Tionesta | 610 | Forest County |
| Titusville Estates | PA6200053 | CWS | Meadville | 44 | Crawford County |
| Tmi Plt Drinking Water Sys | PA7220917 | NTNCWS | Middletown | 300 | Dauphin County |
| Toby Water | PA6240008 | CWS | Kersey | 440 | Elk County |
| Tommy Tinkers Inc | PA1150902 | NTNCWS | Kennett Square | 180 | Chester County |
| Topton Boro Water Supply | PA3060072 | CWS | Topton | 2,069 | Berks County |
| Torrance State Hospital | PA5650036 | CWS | Torrance | 997 | Westmoreland County |
| Towamensing Elementary | PA3130846 | NTNCWS | Palmerton | 430 | Carbon County |
| Towamensing Kids Cc & Lc | PA3130993 | NTNCWS | Lehighton | 25 | Carbon County |
| Tower City Borough Authority | PA3540045 | CWS | Tower City | 3,150 | Schuylkill County |
| Town & Country Water Assoc | PA2400096 | CWS | Shavertown | 79 | Luzerne County |
| Town And Country Estates | PA2080019 | CWS | Richmond | 200 | Bradford County |
| Town Homes At Maple Lane | PA2450098 | CWS | Stroudsburg | 60 | Monroe County |
| Township Of Springdale | PA5020021 | CWS | Harwick | 1,600 | Allegheny County |
| Tranquility Falls | PA2520040 | CWS | Greentown | 121 | Pike County |
| Transitions Health Care | PA7500028 | CWS | Duncannon | 150 | Perry County |
| Trautman Plaza | PA3061242 | NTNCWS | Myerstown | 35 | Berks County |
| Trexlertown Crossings | PA3390353 | NTNCWS | Allentown | 50 | Lehigh County |
| Tri County Rural Electric | PA2590336 | NTNCWS | Mansfield | 50 | Tioga County |
| Tri Valley Eldo Lake Division | PA2450080 | CWS | Lehighton | 310 | Carbon County, Monroe County |
| Trinity Episcopal Church | PA1090908 | NTNCWS | Buckingham | 58 | Bucks County |
| Trinity Evan Luth Ch Fileys | PA7670376 | NTNCWS | Camp Hill | 135 | York County |
| Triple J Mhp | PA7360055 | CWS | Ellicott City | 200 | Lancaster County |
| Trotter Farms | PA4140132 | CWS | State College | 175 | Centre County, Mifflin County |
| Troy Water Deptartment | PA2080020 | CWS | Troy | 1,362 | Bradford County |
| True Spirit Holdings | PA3130995 | NTNCWS | Saylorsburg | 47 | Carbon County |
| Trumbauersville Mun Waterworks | PA1090091 | CWS | Trumbauersville | 974 | Bucks County |
| Tulpehocken Area Mid High Sc | PA3060359 | NTNCWS | Bethel | 930 | Berks County |
| Tunkhannock Primary Center | PA2660310 | NTNCWS | Tunkhannock | 500 | Wyoming County |
| Turkey Hill Dairy | PA7360322 | NTNCWS | Conestoga | 400 | Lancaster County |
| Turkeyfoot Valley Sch | PA4560383 | NTNCWS | Confluence | 450 | Somerset County |
| Tuscarora Village | PA3480082 | CWS | Dunmore | 225 | Northampton County |
| Twin Cedars Assisted Living Ce | PA2520946 | NTNCWS | Shohola | 27 | Pike County |
| Twin Falls Mhp | PA2450025 | CWS | East Stroudsburg | 34 | Monroe County |
| Twin Lakes Utilities Inc | PA2520051 | CWS | Honesdale | 300 | Pike County |
| Twin Maples Mhp | PA7380027 | CWS | Lebanon | 280 | Lebanon County |
| Twin Oaks Pch | PA2080349 | NTNCWS | Granville Summit | 25 | Bradford County |
| Twin Pines Health Care Center | PA1150007 | CWS | West Grove | 120 | Chester County |
| Twin Valley Bible Academy | PA7360546 | NTNCWS | Narvon | 190 | Lancaster County |
| Twin Valley Middle School | PA3061021 | NTNCWS | Elverson | 1,140 | Berks County |
| Twin Valley Robeson Elem Sch | PA3060361 | NTNCWS | Elverson | 501 | Berks County |
| Twin Valley Senior High School | PA3060360 | NTNCWS | Elverson | 1,125 | Berks County |
| Two Hundred Pinebrook Place | PA3540936 | NTNCWS | Orwigsburg | 55 | Schuylkill County |
| Twp Of Upper Makefield | PA1090122 | CWS | Newtown | 1,800 | Bucks County |
| Tylersville Mutual Water Assn | PA4180065 | CWS | Loganton | 273 | Clinton County |
| Tyson Foods | PA7360822 | NTNCWS | New Holland | 1,144 | Lancaster County |
| Ufp Gordon Llc | PA3540945 | NTNCWS | Gordon | 170 | Schuylkill County |
| Ugi Central Penn Gas | PA6420847 | NTNCWS | Denver | 50 | McKean County |
| Ugi Utilities Inc | PA2590331 | NTNCWS | Denver | 30 | Tioga County |
| Ulster Municipal Authority | PA2080032 | CWS | Ulster | 500 | Bradford County |
| Ulysses Municipal Authority | PA6530006 | CWS | Ulysses | 640 | Potter County |
| Umh Arbor Estates | PA1090007 | CWS | Morgantown | 920 | Bucks County |
| Umh Valley Stream | PA2400038 | CWS | Mountain Top | 384 | Luzerne County |
| Union Grove Mennonite School | PA7360594 | NTNCWS | East Earl | 99 | Lancaster County |
| Union Square | PA1090302 | NTNCWS | New Hope | 300 | Bucks County |
| Union Township Office Building | PA3060344 | NTNCWS | Douglassville | 50 | Berks County |
| Union Twp Municipal Authority | PA6170034 | CWS | Rockton | 450 | Clearfield County |
| Unionville Muni Waterworks | PA4140079 | CWS | Fleming | 290 | Centre County |
| Upland Country Day School | PA1150851 | NTNCWS | Kennett Square | 265 | Chester County |
| Upmc Western Psychiatric Inst | PA5020884 | NTNCWS | Pittsburgh | 2,645 | Allegheny County |
| Upper Bucks Technical School | PA1091162 | NTNCWS | Perkasie | 600 | Bucks County |
| Upper Dauphin Middle Sch | PA7220310 | NTNCWS | Lykens | 779 | Dauphin County |
| Upper Dublin High School | PA1460468 | NTNCWS | Maple Glen | 1,473 | Montgomery County |
| Upper Halfmoon Water | PA4140109 | CWS | Port Matilda | 1,500 | Centre County |
| Upper Makefield Enclave | PA1090121 | CWS | Newtown | 25 | Bucks County |
| Upper Octorara Church/Preschoo | PA1150696 | NTNCWS | Parkesburg | 150 | Chester County |
| Urban Acres Mhp | PA3060070 | CWS | Fleetwood | 80 | Berks County |
| Urban Outfitters | PA7360683 | NTNCWS | Gap | 1,001 | Lancaster County |
| Uriah Community Church | PA7211016 | NTNCWS | Gardners | 80 | Cumberland County |
| Us Army Garrison | PA7210010 | CWS | Carlisle | 1,700 | Cumberland County |
| Us Bronze Foundry And Machine | PA6200369 | NTNCWS | Meadville | 75 | Crawford County |
| Usda Bradford Ranger Station | PA6420303 | NTNCWS | Warren | 50 | McKean County |
| Va Healthcare System Heinz | PA5020031 | CWS | Pittsburgh | 3,112 | Allegheny County |
| Vail Water Assn | PA4070056 | CWS | Tyrone | 98 | Blair County |
| Valco | PA7361010 | NTNCWS | Bird In Hand | 94 | Lancaster County |
| Valco Headquarters | PA7360785 | NTNCWS | New Holland | 56 | Lancaster County |
| Vali-View Mobile Home Park | PA4410169 | CWS | Bullville | 150 | Lycoming County |
| Valley Gorge Mh Park Llc | PA2400126 | CWS | Fleetwood | 60 | Luzerne County |
| Valley National | PA3480929 | NTNCWS | Allentown | 65 | Northampton County |
| Valley Run Water System | PA3060135 | CWS | Georgetown | 626 | Berks County, Chester County |
| Valley Sch Of Ligonier | PA5650310 | NTNCWS | Ligonier | 238 | Westmoreland County |
| Valley View Business Condo | PA1150593 | NTNCWS | Exton | 100 | Chester County |
| Valley View Estates | PA3390005 | CWS | Macungie | 68 | Lehigh County |
| Valley View Mhp | PA2400051 | CWS | Shavertown | 480 | Luzerne County |
| Valley View Mhp Blandon | PA3060028 | CWS | Fleetwood | 50 | Berks County |
| Valley View Mhp Morgantown | PA7360155 | CWS | Morgantown | 60 | Lancaster County |
| Valley View Mhp Wernersville | PA3060073 | CWS | Gap | 60 | Berks County |
| Valley View Village Mhp | PA6620005 | CWS | Warren | 55 | Warren County |
| Van Hoekelen Greenhouses | PA3540949 | NTNCWS | Mcadoo | 125 | Schuylkill County |
| Vanport Twp Muni Auth | PA5040055 | CWS | Vanport | 2,000 | Beaver County |
| Venango Water Co | PA6610014 | CWS | Dubois | 550 | Venango County |
| Ventures In Learning Npps | PA2640881 | NTNCWS | Moscow | 60 | Wayne County |
| Veolia Water Pa Brown Manor | PA2400073 | CWS | Harrisburg | 91 | Luzerne County |
| Veolia Water Pa Harveys Lake | PA2400103 | CWS | Harrisburg | 200 | Luzerne County |
| Veolia Water Pa Inc Ccip | PA4190840 | CWS | Bloomsburg | 419 | Columbia County |
| Veolia Water Pa Noxen | PA2660012 | CWS | Harrisburg | 315 | Wyoming County |
| Veolia Water Pa Shavertown | PA2400091 | CWS | Harrisburg | 3,472 | Luzerne County |
| Vernon Twp Water Authority | PA6200072 | CWS | Meadville | 1,500 | Crawford County |
| Versum Materials Us Llc | PA3540445 | NTNCWS | Tamaqua | 350 | Schuylkill County |
| Viant Westfield Plant | PA2590317 | NTNCWS | Westfield | 100 | Tioga County |
| Victaulic Lawrenceville | PA2590320 | NTNCWS | Easton | 300 | Tioga County |
| Victoria Estates Mhp | PA6200065 | CWS | Guys Mills | 78 | Crawford County |
| Victoria Manor Est | PA7360031 | CWS | Camp Hill | 120 | Lancaster County |
| Victoria Village Townhouse | PA2450117 | CWS | Brodheadsville | 99 | Monroe County |
| Victory Elementary School | PA6610345 | NTNCWS | Franklin | 255 | Venango County |
| Village 2 Community Assoc | PA1090040 | CWS | New Hope | 650 | Bucks County |
| Village At Camelback | PA2450056 | CWS | Tannersville | 309 | Monroe County |
| Village At Gap | PA7360698 | NTNCWS | Malvern | 100 | Lancaster County |
| Village At Safe Harbor | PA7360122 | CWS | Lancaster | 120 | Lancaster County, York County |
| Village At Summit Crest | PA3060108 | CWS | Morgantown | 120 | Berks County |
| Village At Whispering Pines | PA2080009 | CWS | New Columbia | 93 | Bradford County |
| Village Ctr At Lords Valley | PA2520963 | NTNCWS | Sunbury | 400 | Pike County |
| Village Ctr At Marshalls Creek | PA2451079 | NTNCWS | Lake Hopatcong | 250 | Monroe County |
| Village Of Buckingham Springs | PA1090133 | CWS | New Hope | 1,295 | Bucks County |
| Village Of Four Seasons | PA2580039 | CWS | Union Dale | 325 | Susquehanna County |
| Village Of Mtn Heights Mhp | PA2660035 | CWS | Milton | 76 | Wyoming County |
| Village Of Neshaminy Falls | PA1460077 | CWS | North Wales | 1,300 | Montgomery County |
| Village Of Pleasant Hill | PA3060032 | CWS | Morgantown | 650 | Berks County |
| Village Shopping Center | PA2660385 | NTNCWS | Owings Mills | 500 | Wyoming County |
| Village Square Condiminiums | PA7500009 | CWS | Shermans Dale | 48 | Perry County |
| Village Square Plaza | PA7500836 | NTNCWS | Shermans Dale | 800 | Perry County |
| Villas At Georgetown | PA7360184 | CWS | Christiana | 30 | Lancaster County |
| Virginia Hills Pa Llc | PA5020083 | CWS | Farmington Hills | 843 | Allegheny County |
| Vitro Meadville Flat Glass | PA6201069 | NTNCWS | Cochranton | 175 | Crawford County |
| Volant Borough Water Dept | PA6370042 | CWS | Volant | 120 | Lawrence County |
| W Carroll Twp W Auth St Bened | PA4110061 | CWS | Elmora | 488 | Cambria County |
| W Fallowfield Christian School | PA1150691 | NTNCWS | Atglen | 160 | Chester County |
| W Freedom Water Assn | PA6160021 | CWS | Parker | 250 | Clarion County, Jefferson County |
| W Stclair Pleasantville Muni | PA4050020 | CWS | Alum Bank | 715 | Bedford County |
| Wadels Mhp | PA7280027 | CWS | Shippensburg | 97 | Franklin County |
| Wagontown Country Day School | PA1150613 | NTNCWS | Wagontown | 100 | Chester County |
| Walker Twp Muni Auth | PA4310038 | CWS | Mc Connellstown | 1,450 | Huntingdon County |
| Walker Twp Water Assn | PA4140120 | CWS | Mingoville | 3,250 | Centre County |
| Wallenpaupack Lake Estates | PA2640036 | CWS | Lake Ariel | 2,200 | Wayne County |
| Walmar Manor Mhp | PA7670005 | CWS | Banner Elk | 400 | York County |
| Walnut Grove Mhc | PA7010053 | CWS | Farmington Hills | 425 | Adams County |
| Walnutport Authority | PA3480032 | CWS | Walnutport | 3,000 | Northampton County |
| Walnutport Mobile Court | PA3480063 | CWS | Walnutport | 150 | Northampton County |
| Warren County Christian School | PA6620826 | NTNCWS | Youngsville | 50 | Warren County |
| Warren State Hospital | PA6620034 | CWS | North Warren | 721 | Warren County |
| Warriors Mark Gen Auth | PA4310031 | CWS | Warriors Mark | 750 | Huntingdon County |
| Warwick Child Care Center | PA1150701 | NTNCWS | Lansdowne | 65 | Chester County |
| Warwick Daycare-North Coventry | PA1150612 | NTNCWS | Lansdowne | 36 | Chester County |
| Warwick Mobile Home Park | PA1150081 | CWS | Exton | 40 | Chester County |
| Warwick Twp Rothsville System | PA7360120 | CWS | Lititz | 2,846 | Lancaster County |
| Warwick Water Works | PA1150157 | CWS | King Of Prussia | 98 | Chester County |
| Wasd High School | PA2520301 | NTNCWS | Hawley | 1,456 | Pike County |
| Wasd Middle School | PA2520302 | NTNCWS | Hawley | 1,450 | Pike County |
| Wasd North Primary School | PA2521041 | NTNCWS | Hawley | 583 | Pike County |
| Wasd South Elementary School | PA2640434 | NTNCWS | Hawley | 600 | Pike County, Wayne County |
| Wash Crossing Co Op Nursery | PA1090930 | NTNCWS | Washington Crossing | 118 | Bucks County |
| Washington Estates Ii Mhc Llc | PA5630079 | CWS | Farmington Hills | 373 | Washington County |
| Washington Estates Mhc Llc | PA5630078 | CWS | Farmington Hills | 358 | Washington County |
| Washington Inn | PA3060909 | NTNCWS | Bechtelsville | 70 | Berks County |
| Waterford Waterworks | PA5650037 | CWS | Ligonier | 389 | Westmoreland County |
| Waterside Loysburg Water Suppl | PA4050035 | CWS | Loysburg | 1,724 | Bedford County |
| Waterville Water Assoc | PA4410187 | CWS | Waterville | 98 | Lycoming County |
| Watrous Water Association | PA2590029 | CWS | Gaines | 75 | Tioga County |
| Wattsburg Area School Complex | PA6250322 | NTNCWS | Erie | 1,900 | Erie County |
| Wattsburg Boro Wtp | PA6250094 | CWS | Wattsburg | 450 | Erie County |
| Wawa Store #159 | PA2450949 | NTNCWS | Wawa | 1,001 | Monroe County |
| Wayne Twp Muni Water Auth | PA4440017 | CWS | Mcveytown | 167 | Mifflin County |
| Wbwa Mohrsville District | PA3060087 | CWS | Reading | 375 | Berks County |
| Wcsd Central Office And Lec | PA6620300 | NTNCWS | Russell | 80 | Warren County |
| Weatherly Boro Mun Auth | PA3130015 | CWS | Weatherly | 2,612 | Carbon County |
| Weaverland Valley Blue Ball | PA7360005 | CWS | East Earl | 1,946 | Lancaster County |
| Weavertown Mennonite Sch | PA7360565 | NTNCWS | Bird In Hand | 160 | Lancaster County |
| Wec International | PA1460012 | CWS | Fort Washington | 25 | Montgomery County |
| Wee Wons Scotrun | PA2451184 | NTNCWS | Scotrun | 60 | Monroe County |
| Wee Wons Daycare | PA2451279 | NTNCWS | New York | 61 | Monroe County |
| Weidas Mobile Home Park | PA2580021 | CWS | New Milford | 77 | Susquehanna County |
| Weiler Corporation | PA2450425 | NTNCWS | Cresco | 400 | Monroe County |
| Weis Market 151 | PA2451289 | NTNCWS | Brodheadsville | 55 | Monroe County |
| Weis Markets East Berlin | PA7010965 | NTNCWS | East Berlin | 1,800 | Adams County |
| Wellington Mobile Estates | PA3130029 | CWS | Morgantown | 90 | Carbon County |
| Wells Tannery Water Sys | PA4290003 | CWS | Wells Tannery | 95 | Fulton County |
| Wellspring Commons | PA7360374 | NTNCWS | Lancaster | 30 | Lancaster County |
| Wellsville Elem Sch | PA7671317 | NTNCWS | Dillsburg | 250 | York County |
| Welsh Mountain Home | PA7360047 | CWS | New Holland | 53 | Lancaster County |
| Wesley United Methodist Church | PA7361111 | NTNCWS | Quarryville | 250 | Lancaster County |
| West Buffalo Twp Mun Auth | PA4600015 | CWS | Mifflinburg | 333 | Union County |
| West Carroll W Auth Bakerton | PA4110058 | CWS | Elmora | 670 | Cambria County |
| West Cocalico Twp Water Auth | PA7360141 | CWS | Reinholds | 2,430 | Lancaster County |
| West Cornwall Township Ma | PA7380031 | CWS | Quentin | 900 | Lebanon County |
| West End Elementary School | PA6201175 | NTNCWS | Meadville | 500 | Crawford County |
| West End Healthcare Center | PA2451408 | NTNCWS | Austin | 70 | Monroe County |
| West End Plaza | PA2451050 | NTNCWS | Jenkintown | 300 | Monroe County |
| West Grove Borough | PA1150105 | CWS | West Grove | 2,873 | Chester County |
| West Hickory Water Company | PA6270002 | CWS | Sharon | 450 | Forest County |
| West Kittanning Muni Auth | PA5030045 | CWS | Kittanning | 2,000 | Armstrong County |
| West Lake Pipe & Fitting | PA7360540 | NTNCWS | Leola | 75 | Lancaster County |
| West Lebanon Twp Water Supply | PA7380040 | CWS | Lebanon | 780 | Lebanon County |
| West Penn Elementary | PA3540312 | NTNCWS | Tamaqua | 360 | Schuylkill County |
| West Penn Hospital | PA5020957 | NTNCWS | Pittsburgh | 500 | Allegheny County |
| West Perry High Sch | PA7500307 | NTNCWS | Elliottsburg | 850 | Perry County |
| West Rock | PA2450473 | NTNCWS | Delaware Water Gap | 90 | Monroe County |
| West Sheffield Water Assn | PA6620007 | CWS | Sheffield | 225 | Warren County |
| West Springfield Mobile Hm Pk | PA6250004 | CWS | Erie | 90 | Erie County |
| Western Berks Water Auth | PA3060066 | CWS | Sinking Spring | 75 | Berks County |
| Western Clinton Co Mun Auth | PA4180058 | CWS | Renovo | 2,610 | Clinton County |
| Western Cumberland Water Sys | PA7010038 | CWS | York | 275 | Adams County |
| Western Heights | PA7360132 | CWS | New Holland | 312 | Lancaster County |
| Western International Gas | PA2401087 | NTNCWS | Waverly | 65 | Luzerne County |
| Western Wayne High School | PA2640338 | NTNCWS | Lake Ariel | 1,184 | Wayne County |
| Westfall Water Company | PA2521075 | NTNCWS | Larchmont | 25 | Pike County |
| Westfield Borough Waterworks | PA2590043 | CWS | Westfield | 1,300 | Tioga County |
| Westgate Water System | PA2660015 | CWS | Tunkhannock | 150 | Wyoming County |
| Westmoreland Hospital | PA5650441 | NTNCWS | Greensburg | 1,500 | Westmoreland County |
| Westover Municipal Authority | PA6170040 | CWS | Westover | 456 | Clearfield County |
| Westtown School | PA1150834 | CWS | West Chester | 900 | Chester County |
| Westwood Park Water Co | PA4070059 | CWS | Altoona | 95 | Blair County |
| Wetherill Estates | PA1150209 | CWS | Exton | 250 | Chester County |
| Whales Snails Puppy Dog Tails | PA7671087 | NTNCWS | Etters | 135 | York County |
| Wheatfield Village | PA2520087 | CWS | Milford | 35 | Monroe County, Pike County |
| Wherley Park | PA7670066 | CWS | York | 34 | York County |
| Whipperwill Mhp | PA2400063 | CWS | Lititz | 25 | Luzerne County |
| Whispering Hollow-South Mhp | PA3480045 | CWS | Northampton | 400 | Northampton County |
| Whispering Pines Mhp | PA2400008 | CWS | River Edge | 55 | Luzerne County |
| Whispering Pines Mhp | PA7670110 | CWS | Brogue | 97 | York County |
| Whispering Woods | PA5040049 | CWS | Butler | 100 | Beaver County |
| White Deer Run Treatment Centr | PA4600004 | NTNCWS | Allenwood | 226 | Union County |
| White Haven Center | PA2400109 | CWS | White Haven | 375 | Luzerne County |
| White Manor Country Club | PA1150373 | NTNCWS | Malvern | 300 | Chester County |
| White Oak Lanc Leb Iu 13 | PA7361093 | NTNCWS | Lancaster | 65 | Lancaster County |
| White Rock Mobile Home Park | PA2450038 | CWS | Lake City | 50 | Monroe County |
| White Sand Springs | PA2520207 | CWS | Tafton | 115 | Pike County |
| Whiteland Pointe | PA1150629 | NTNCWS | Malvern | 40 | Chester County |
| Whites Ferry Road Apts | PA2660042 | CWS | Nicholson | 39 | Wyoming County |
| Whites Mobile Home Park | PA2580001 | CWS | Clifford Twp | 90 | Susquehanna County |
| Whitetail Ski Resort | PA7280903 | CWS | Mercersburg | 912 | Franklin County |
| Whitley East Llc | PA7360733 | NTNCWS | Leola | 70 | Lancaster County |
| Wigwam Park Commons | PA2450705 | NTNCWS | E Stroudsburg | 36 | Monroe County |
| Wilbur Community Water | PA4560050 | CWS | Stoystown | 97 | Somerset County |
| Wilderness Mhp | PA6620019 | CWS | Moscow | 200 | Warren County |
| Will O Hill Apts | PA3060036 | CWS | Reading | 300 | Berks County |
| Williams Aba Office Tunk | PA2660981 | NTNCWS | Tunkhannock | 100 | Wyoming County |
| Williams Grove Mhp | PA7210034 | CWS | York | 282 | Cumberland County |
| Williams Twp Elem School | PA3480351 | NTNCWS | Easton | 460 | Northampton County |
| Williamsburg Munic Auth | PA4070022 | CWS | Williamsburg | 1,800 | Blair County |
| Williamstown Boro Auth | PA7220037 | CWS | Williamstown | 2,390 | Dauphin County |
| Willow Haven North Mhp | PA3480058 | CWS | Morgantown | 240 | Northampton County |
| Willowdale Academy Avondale | PA1150327 | NTNCWS | Avondale | 52 | Chester County |
| Willowdale Academy Kennett Sq | PA1150867 | NTNCWS | Kennett Square | 90 | Chester County |
| Willowdale Town Center | PA1150736 | NTNCWS | Chadds Ford | 500 | Chester County |
| Windhaven Mhp | PA1460005 | CWS | Malvern | 112 | Montgomery County |
| Windmill Day School And Camp | PA1091398 | NTNCWS | Doylestown | 75 | Bucks County |
| Windsor Boro Water Auth | PA7670065 | CWS | Windsor | 1,332 | York County |
| Windsor Castle Mhp | PA3060034 | CWS | Ramsey | 90 | Berks County |
| Windsor Mobilehome Park | PA6250021 | CWS | Bethlehem | 70 | Erie County |
| Winola View Apts | PA2660047 | CWS | Nicholson | 28 | Wyoming County |
| Winside Ind Park | PA3480973 | NTNCWS | Bethlehem | 60 | Northampton County |
| Winterstown United Methodist C | PA7670356 | NTNCWS | Felton | 84 | York County |
| Wise Foods Inc | PA4190892 | NTNCWS | Berwick | 600 | Columbia County |
| Wolfs Camping Resort | PA6160861 | NTNCWS | Knox | 1,000 | Clarion County |
| Wonderview Water Co | PA4190015 | CWS | Harrisburg | 350 | Columbia County |
| Wood Broad Top Wells Jmun Auth | PA4310032 | CWS | Wood | 800 | Bedford County, Huntingdon County |
| Woodbine Oaks Mhp | PA5100004 | CWS | Butler | 65 | Butler County |
| Woodbrooke Water Authority | PA1150164 | CWS | Coatesville | 87 | Chester County |
| Woodbury Water Authority | PA4050023 | CWS | Woodbury | 295 | Bedford County |
| Wooded Ridge Development | PA1460025 | CWS | Green Lane | 90 | Montgomery County |
| Woodgrain Inc | PA2080347 | NTNCWS | Towanda | 425 | Bradford County |
| Woodhaven Mobile Home Park | PA6250084 | CWS | Cumming | 350 | Erie County |
| Woodland Est Mobile Homes | PA7360100 | CWS | Coatesville | 72 | Lancaster County |
| Woodland Heights Apartments | PA6200063 | CWS | Meadville | 100 | Crawford County |
| Woodland Heights Dist | PA6610040 | CWS | Seneca | 480 | Venango County |
| Woodland Hills | PA2640051 | CWS | Lakeville | 320 | Wayne County |
| Woodland Mhp | PA3060004 | CWS | Norristown | 61 | Berks County |
| Woodlands Mobile Home Park | PA6200039 | CWS | Meadville | 175 | Crawford County |
| Woodlyn Residences | PA2640055 | CWS | Hamlin | 35 | Wayne County |
| Woodmere Estates | PA6370047 | CWS | New Castle | 61 | Lawrence County |
| Woodside Mobile Home Park | PA3390091 | CWS | Northampton | 130 | Lehigh County |
| Woodside Terrace Mhp | PA2080015 | CWS | Landisburg | 84 | Bradford County |
| World Of Imagination | PA3390988 | NTNCWS | Whitehall | 91 | Lehigh County |
| World Travel Inc | PA3061126 | NTNCWS | Douglassville | 95 | Berks County |
| Worthington West Franklin Jma | PA5030027 | CWS | Worthington | 1,500 | Armstrong County |
| Wrightstown Elem School | PA1091305 | NTNCWS | Newtown | 415 | Bucks County |
| Wrought Products | PA6610875 | NTNCWS | Oil City | 35 | Venango County |
| Wyalusing Area School District | PA2080358 | NTNCWS | Wyalusing | 1,200 | Bradford County |
| Wyalusing Municipal Authority | PA2080034 | CWS | Wyalusing | 700 | Bradford County |
| Wynwood House At Salem Hill | PA4140127 | CWS | Spring Mills | 32 | Centre County |
| Wyoming Cnty Healthcare Ctr | PA2660603 | NTNCWS | Tunkhannock | 175 | Wyoming County |
| Wysox Twp Municipal Authority | PA2080030 | CWS | Towanda | 1,763 | Bradford County |
| Y2Kids Child Care Center | PA3391037 | NTNCWS | Slatington | 120 | Lehigh County |
| Ybec Plainfield | PA7210329 | NTNCWS | Carlisle | 69 | Cumberland County |
| Yellow Breeches Ed Center | PA7220418 | NTNCWS | Carlisle | 200 | Dauphin County |
| Yerkes Water Association | PA1460064 | CWS | Collegeville | 165 | Montgomery County |
| York Haven Newberry Elem Sch | PA7671318 | NTNCWS | Manchester | 350 | York County |
| York Springs Muni Water | PA7010030 | CWS | York Springs | 1,095 | Adams County |
| Youngs Mobile Home Park | PA5100143 | CWS | Butler | 63 | Butler County |
| Youngstown Boro Muni Auth | PA5650081 | CWS | Youngstown | 2,730 | Westmoreland County |
| Youngsville Mun Waterworks | PA6620039 | CWS | Youngsville | 1,957 | Warren County |
| Youth Forestry Camp No 3 | PA4310014 | CWS | James Creek | 43 | Huntingdon County |
| Zartman Construction | PA4490867 | NTNCWS | Northumberland | 100 | Northumberland County |
| Zeigler Mhp | PA7670096 | CWS | York | 46 | York County |
| Zerbe Sisters | PA7360094 | CWS | Narvon | 210 | Lancaster County |
| Zion Blue Mountain Church | PA3061168 | NTNCWS | Strausstown | 210 | Berks County |
| Zullinger Water System Wtma | PA7280044 | CWS | Waynesboro | 1,080 | Franklin County |
| Zwicky Recycling | PA3061216 | NTNCWS | Fleetwood | 60 | Berks County |