473 community and non-transient non-community water systems are listed for West Virginia in EPA SDWIS. 103 were sampled under UCMR 5; 34 of those had at least one PFAS result at or above the reporting level, and 21 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
West Virginia 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 (103)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Adrian P S D | WV3304911 | French Creek | 5,327 | <MRL | <MRL | 0 | Other PFAS detected |
| Alderson Water | WV3301315 | Alderson | 2,458 | <MRL | <MRL | 0 | No PFAS detected |
| Arthurdale Water Assoc. | WV3303902 | Arthurdale | 264 | <MRL | <MRL | 0 | No PFAS detected |
| Athens Town Of | WV3302801 | Athens | 5,633 | <MRL | <MRL | 0 | No PFAS detected |
| Beckley Water Company | WV3304104 | Sandyville | 47,386 | <MRL | <MRL | 0 | No PFAS detected |
| Berkeley Co P S W D-Bunker Hill | WV3300202 | Martinsburg | 0 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Berkeley County Pswd-Potomac River | WV3300218 | Martinsburg | 69,372 | <MRL | <MRL | 0 | No PFAS detected |
| Berkeley Springs City Of | WV3303301 | Berkeley Springs | 3,526 | <MRL | <MRL | 0 | No PFAS detected |
| Bluewell Psd | WV3302804 | Bluefield | 6,216 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bridgeport City Of | WV3301703 | Bridgeport | 11,158 | 5 | <MRL | 0 | PFOA 1–3 × its limit |
| Buckhannon Water Board | WV3304902 | Buckhannon | 8,098 | <MRL | <MRL | 0 | No PFAS detected |
| Buffalo Creek Psd | WV3302347 | Logan | 3,542 | <MRL | <MRL | 0 | No PFAS detected |
| Charles Town Utilities | WV3301905 | Charles Town | 15,220 | <MRL | <MRL | 0 | No PFAS detected |
| Cheat View Psd | WV3303106 | Morgantown | 9,984 | <MRL | <MRL | 0 | No PFAS detected |
| Clarksburg Water Board | WV3301705 | Clarksburg | 19,072 | <MRL | <MRL | 0 | No PFAS detected |
| Clay Battelle Psd | WV3303121 | Core | 3,858 | <MRL | <MRL | 0 | No PFAS detected |
| Claywood Park Psd | WV3305402 | Parkersburg | 8,141 | 11.1 | <MRL | 0 | PFOA 1–3 × its limit |
| Clinton Water Assoc - Route 119 | WV3303107 | Charleston | 5,733 | <MRL | <MRL | 0 | No PFAS detected |
| Cool Ridge Flat Top Psd | WV3304139 | Cool Ridge | 4,190 | <MRL | <MRL | 0 | No PFAS detected |
| Corporation Of Shepherdstown | WV3301933 | Shepherdstown | 4,300 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Cowen Psd | WV3305103 | Cowen | 3,098 | <MRL | <MRL | 0 | No PFAS detected |
| Craigsville Psd | WV3303402 | Craigsville | 4,997 | <MRL | <MRL | 0 | No PFAS detected |
| Eastern Wyoming Psd Stephenson Wtp | WV3305521 | Mullens | 3,616 | <MRL | <MRL | 0 | No PFAS detected |
| Elkins City Of | WV3304203 | Elkins | 9,350 | <MRL | <MRL | 0 | No PFAS detected |
| Elkins Road Psd | WV3304909 | Buckhannon | 2,890 | <MRL | <MRL | 0 | No PFAS detected |
| Fairmont City Of | WV3302502 | Fairmont | 30,586 | <MRL | <MRL | 0 | No PFAS detected |
| Fbi Center Clarksburg | WV9917026 | Clarksburg | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Flatwoods Canoe Run Psd | WV3300402 | Sutton | 4,344 | <MRL | <MRL | 0 | No PFAS detected |
| Follansbee Hooverson Heights | WV3300512 | Follansbee | 4,970 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Frankfort Psd | WV3302928 | Fort Ashby | 6,747 | <MRL | <MRL | 0 | No PFAS detected |
| Frankfort Psd Wiley Ford | WV3302926 | Fort Ashby | 1,062 | <MRL | <MRL | 0 | No PFAS detected |
| Gauley River Psd | WV3301042 | Swiss | 3,944 | <MRL | <MRL | 0 | No PFAS detected |
| Gilmer County Psd - Normantown Stumptown | WV3301109 | Glenville | 523 | <MRL | <MRL | 0 | No PFAS detected |
| Grafton City Of | WV3304601 | Grafton | 6,333 | <MRL | <MRL | 0 | No PFAS detected |
| Grant Co Psd-Northfork-Maysville | WV3301206 | Petersburg | 4,829 | <MRL | <MRL | 0 | No PFAS detected |
| Greater Harrison Psd Lost Creek Mt Clare | WV3301713 | West Milford | 3,536 | 4.8 | <MRL | 0 | PFOA 1–3 × its limit |
| Green Valley Glenwood Psd Glenwood | WV3302849 | Bluefield | 4,914 | <MRL | <MRL | 0 | No PFAS detected |
| Hurricane City Of | WV3304005 | West Hamlin | 8,987 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Huttonsville Psd | WV3304211 | Mill Creek | 4,758 | <MRL | <MRL | 0 | No PFAS detected |
| Junior Town Of | WV3300103 | Junior | 987 | <MRL | <MRL | 0 | No PFAS detected |
| Kenova Municipal Water | WV3305009 | Kenova | 11,192 | <MRL | <MRL | 0 | No PFAS detected |
| Keyser City Of | WV3302915 | Keyser | 4,796 | <MRL | <MRL | 0 | No PFAS detected |
| Kingwood Water Board | WV3303908 | Kingwood | 7,674 | <MRL | <MRL | 0 | No PFAS detected |
| Lavalette Psd | WV3305006 | Lavalette | 7,455 | 4.4 | <MRL | 0 | PFOA 1–3 × its limit |
| Lewisburg | WV3301307 | Lewisburg | 12,065 | <MRL | <MRL | 0 | No PFAS detected |
| Lincoln Psd | WV3302205 | Alum Creek | 3,981 | <MRL | <MRL | 0 | No PFAS detected |
| Logan Co Psd-Greenville System | WV3302357 | Logan | 3,742 | <MRL | <MRL | 0 | No PFAS detected |
| Logan County Psd - Northern Regional | WV3302364 | Logan | 16,822 | <MRL | <MRL | 0 | No PFAS detected |
| Logan Water Board City Of | WV3302331 | Logan | 3,662 | <MRL | <MRL | 0 | No PFAS detected |
| Lubeck Psd | WV3305404 | Washington | 11,724 | 179.5 | <MRL | 0.8 | PFOA ≥ 3 × its limit |
| Mannington Psd | WV3302512 | Mannington | 832 | <MRL | <MRL | 0 | No PFAS detected |
| Marshall County Psd 1 | WV3302606 | Wheeling | 3,463 | <MRL | <MRL | 0.452 | Hazard Index below its limit |
| Marshall County Psd 4 | WV3302609 | Cameron | 4,063 | <MRL | <MRL | 0.005 | Hazard Index below its limit |
| Martinsburg City Of | WV3300212 | Martinsburg | 16,250 | <MRL | <MRL | 0 | Other PFAS detected |
| Mason Co Psd-Crab Creek | WV3302714 | Point Pleasant | 2,039 | <MRL | <MRL | 0 | No PFAS detected |
| Mason Co Psd-Lakin Dist | WV3302712 | Point Pleasant | 4,296 | <MRL | <MRL | 0 | No PFAS detected |
| Midland Psd | WV3304208 | Beverly | 3,802 | <MRL | <MRL | 0 | No PFAS detected |
| Milton Water | WV3300609 | Milton | 5,446 | <MRL | <MRL | 0 | No PFAS detected |
| Mineral Wells Psd | WV3305405 | Mineral Wells | 5,674 | 13.2 | <MRL | 0 | PFOA ≥ 3 × its limit |
| Mingo County Psd - Naugatuck | WV3303029 | Williamson | 2,159 | <MRL | <MRL | 0 | No PFAS detected |
| Morgantown Utility Board | WV3303111 | Morgantown | 66,851 | <MRL | <MRL | 0 | No PFAS detected |
| Moundsville | WV3302611 | Moundsville | 9,911 | <MRL | <MRL | 0 | No PFAS detected |
| Mountaineer Park Inc | WV3301520 | New Cumberland | 5,760 | 12.2 | <MRL | 0.003 | PFOA ≥ 3 × its limit |
| New Martinsville | WV3305203 | New Martinsville | 5,272 | 8.8 | 121.8 | 8.415 | PFOS ≥ 3 × its limit |
| Ohio County Psd | WV3303508 | Triadelphia | 6,297 | <MRL | <MRL | 0.472 | Hazard Index below its limit |
| Parkersburg Utility Board | WV3305407 | Palestine | 34,251 | 46.5 | <MRL | 0.002 | PFOA ≥ 3 × its limit |
| Pennsboro | WV3304306 | Pennsboro | 1,532 | 11.7 | <MRL | 0 | PFOA 1–3 × its limit |
| Pleasants Co Psd | WV3303707 | Pennsboro | 2,357 | 11 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Point Pleasant Water Works | WV3302710 | Pt. Pleasant | 5,146 | <MRL | <MRL | 0.4 | Hazard Index below its limit |
| Preston County Psd 1 | WV3303912 | Hopwood | 3,455 | <MRL | <MRL | 0 | No PFAS detected |
| Preston County Psd 4 | WV3303923 | Bruceton Mills | 8,753 | <MRL | <MRL | 0 | No PFAS detected |
| Putnam P S D | WV3304011 | Scott Depot | 26,410 | <MRL | <MRL | 0 | No PFAS detected |
| Raleigh County Mem Airport | WV3304138 | Sophia | 4,587 | <MRL | <MRL | 0 | No PFAS detected |
| Raleigh County Psd Arnett | WV3304140 | Sophia | 6,663 | <MRL | <MRL | 0 | No PFAS detected |
| Ravenswood Municipal Water Works | WV3301810 | Ravenswood | 5,047 | 4.8 | <MRL | 0.774 | PFOA 1–3 × its limit |
| Red Sulphur Psd | WV3303206 | Peterstown | 5,331 | <MRL | <MRL | 0 | No PFAS detected |
| Ripley City Of | WV3301811 | Ripley | 5,420 | 5.1 | <MRL | 0 | PFOA 1–3 × its limit |
| Shinnston City Of | WV3301721 | Shinnston | 4,959 | <MRL | <MRL | 0 | No PFAS detected |
| Shortline Psd | WV3301722 | Clarksburg | 2,727 | 4.5 | <MRL | 0 | PFOA 1–3 × its limit |
| Southern Jackson County P S D | WV3301817 | Kenna | 6,070 | 5.3 | <MRL | 0 | PFOA 1–3 × its limit |
| Southwestern Water District | WV3304603 | Flemington | 5,363 | <MRL | <MRL | 0 | No PFAS detected |
| Spencer Water Dept | WV3304405 | Spencer | 4,630 | <MRL | <MRL | 0 | No PFAS detected |
| St Albans Water | WV3302031 | Saint Albans | 13,758 | <MRL | <MRL | 0 | No PFAS detected |
| Sugar Creek Psd | WV3300404 | Frametown | 3,241 | <MRL | <MRL | 0 | No PFAS detected |
| Summersville Municipal Water | WV3303404 | Summersville | 5,574 | <MRL | <MRL | 0 | No PFAS detected |
| Union Williams P S D | WV3305410 | Waverly | 7,883 | 5.8 | <MRL | 0 | PFOA 1–3 × its limit |
| Valley Falls Psd | WV3302523 | Fairmont | 4,042 | <MRL | <MRL | 0 | No PFAS detected |
| Vienna | WV3305411 | Vienna | 12,507 | <MRL | <MRL | 0 | Other PFAS detected |
| Washington Pike Psd | WV3300515 | Wellsburg | 2,967 | 4.1 | <MRL | 0.513 | PFOA 1–3 × its limit |
| Wayne Water Town Of | WV3305007 | Wayne | 5,519 | <MRL | <MRL | 0 | No PFAS detected |
| Weirton Area Water Board | WV3300516 | Weirton | 19,676 | 4.1 | 8.2 | 0.7 | PFOS 1–3 × its limit |
| Wellsburg, City Of | WV3300517 | Wellsburg | 4,019 | 4.6 | <MRL | 0.522 | PFOA 1–3 × its limit |
| Wheeling | WV3303516 | Wheeling | 29,899 | <MRL | <MRL | 0.33 | Hazard Index below its limit |
| White Sulphur Springs Water | WV3301314 | White Sulphur Springs | 3,845 | <MRL | <MRL | 0 | No PFAS detected |
| Wilderness Psd | WV3303405 | Mount Nebo | 6,106 | <MRL | <MRL | 0 | No PFAS detected |
| Williamstown Water Dept | WV3305412 | Williamstown | 3,469 | 32 | <MRL | 3.135 | PFOA ≥ 3 × its limit |
| Wvaw - Weston | WV3302104 | Charleston | 14,534 | <MRL | <MRL | 0 | No PFAS detected |
| Wvaw - Walnut Grove Utilities | WV3301942 | Charleston | 7,250 | 4.2 | 17.3 | 1.182 | PFOS ≥ 3 × its limit |
| Wvawc - Huntington Dist | WV3300608 | Charleston | 98,647 | <MRL | <MRL | 0 | No PFAS detected |
| Wvawc Bluefield District | WV3302835 | Charleston | 12,174 | <MRL | <MRL | 0 | No PFAS detected |
| Wvawc Bluestone Plant | WV3304513 | Charleston | 20,562 | <MRL | <MRL | 0 | No PFAS detected |
| Wvawc New River Regional Wtr Trtmt Plt | WV3301046 | Charleston | 25,603 | <MRL | <MRL | 0 | No PFAS detected |
| Wvawc-Kanawha Valley Dist | WV3302016 | Charleston | 209,283 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (370)
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 |
|---|---|---|---|---|---|
| Adventure West Virginia | WV9931044 | NTNCWS | Morgantown | 312 | Monongalia County |
| Albright Town Of | WV3303901 | CWS | Albright | 334 | Preston County |
| Alpine Lake Public Utilities | WV3303921 | CWS | Terra Alta | 1,325 | Preston County |
| Alyeska Inc | WV9939113 | CWS | Bruceton Mills | 50 | Preston County |
| Anmoore Town Of | WV3301701 | CWS | Anmoore | 1,013 | Harrison County |
| Anthony Correctional Center | WV3301317 | NTNCWS | White Sulphur Springs | 27 | Greenbrier County |
| Ashland Community | WV3302417 | CWS | Welch | 32 | McDowell County |
| Aurora Elementary And Jr High | WV9939036 | NTNCWS | Aurora | 195 | Preston County |
| Back Creek Valley Elementary | WV9902002 | NTNCWS | Martinsburg | 150 | Berkeley County |
| Baileysville Elementary And Middle | WV9955003 | NTNCWS | Brenton | 460 | Wyoming County |
| Beech Bottom Water Dept | WV3300502 | CWS | Beech Bottom | 610 | Brooke County |
| Belington Town Of | WV3300101 | CWS | Belington | 2,146 | Barbour County |
| Bellwood Community Facil Imp | WV3301005 | CWS | Rainelle | 87 | Fayette County |
| Belmont, City Of | WV3303701 | CWS | Belmont | 1,003 | Pleasants County |
| Bens Run Industrial Park Water System | WV9948024 | CWS | Friendly | 673 | Tyler County |
| Benwood Water Department | WV3302618 | CWS | Benwood | 1,510 | Marshall County |
| Berkeley Co Pswd-Glenwood Forest | WV3300209 | CWS | Martinsburg | 1,102 | Berkeley County |
| Berkeley Estates | WV3300238 | CWS | Beaverton | 94 | Berkeley County |
| Berkeley Sprgs Healthcare Center - Lower | WV3303315 | CWS | Berkeley Springs | 140 | Morgan County |
| Berkeley Sprgs Healthcare Center - Upper | WV3303313 | CWS | Berkeley Springs | 140 | Morgan County |
| Berkeley Springs Mhc | WV3303306 | CWS | Berkeley Springs | 69 | Morgan County |
| Bethlehem | WV3303514 | CWS | Wheeling | 2,968 | Ohio County |
| Beverly Town Of | WV3304202 | CWS | Beverly | 2,268 | Randolph County |
| Big Bend Psd | WV3304507 | CWS | Talcott | 1,350 | Summers County |
| Bingamon Psd | WV3302525 | CWS | Shinnston | 1,179 | Harrison County, Marion County |
| Birch River Psd | WV3303413 | CWS | Dille | 1,369 | Clay County, Nicholas County |
| Blackhawk Coal Branch Bathhouse | WV9903116 | NTNCWS | Oceana | 60 | Boone County |
| Blackhawk Eagle 3 | WV9955108 | NTNCWS | Oceana | 60 | Wyoming County |
| Blackhawk Flying Eagle Water System | WV9955109 | NTNCWS | Wharton | 60 | Wyoming County |
| Blue Ridge Elementary | WV9919005 | NTNCWS | Charles Town | 455 | Jefferson County |
| Blue Ridge Primary School | WV9919094 | NTNCWS | Charles Town | 248 | Jefferson County |
| Branchland Midkiff Psd | WV3302202 | CWS | Branchland | 3,077 | Lincoln County |
| Brenton Psd | WV3305504 | CWS | Brenton | 241 | Wyoming County |
| Brooke County Psd | WV3300523 | CWS | Wellsburg | 240 | Brooke County |
| Burnsville Public Utility | WV3300408 | CWS | Burnsville | 1,126 | Braxton County |
| Cacapon State Park | WV9933007 | NTNCWS | Hancock | 100 | Morgan County |
| Cairo Water Department | WV3304301 | CWS | Cairo | 339 | Ritchie County |
| Caledonia Heights Subdivision | WV3301605 | CWS | Moorefield | 200 | Hardy County |
| Camden On Gauley - Cowen | WV3305107 | CWS | Craigsville | 79 | Webster County |
| Camden On Gauley - Craigsville | WV3305102 | CWS | Craigsville | 502 | Webster County |
| Cameron Water | WV3302603 | CWS | Cameron | 962 | Marshall County |
| Canaan Valley State Park | WV9947044 | NTNCWS | Davis | 1,683 | Tucker County |
| Caperton Furniture Works | WV9933049 | NTNCWS | Berkeley Springs | 120 | Morgan County |
| Carpendale, Town Of | WV3302947 | CWS | Ridgeley | 937 | Mineral County |
| Cass Scenic Railroad | WV3303802 | CWS | Cass | 555 | Pocahontas County |
| Central Barbour Psd | WV3300106 | CWS | Philippi | 2,096 | Barbour County |
| Central Barbour Psd - Belington | WV3300110 | CWS | Philippi | 629 | Barbour County |
| Central Boaz Psd | WV3305401 | CWS | Parkersburg | 1,628 | Wood County |
| Central Hampshire Psd | WV3301411 | CWS | Augusta | 2,274 | Hampshire County |
| Central Hampshire Psd - Rt 28 | WV3301406 | CWS | Augusta | 388 | Hampshire County |
| Central Hampshire Psd Green Spring | WV3301412 | CWS | Augusta | 1,046 | Hampshire County |
| Century Volga Psd | WV3300107 | CWS | Philippi | 2,603 | Barbour County |
| Ceredo Water Works | WV3305001 | CWS | Ceredo | 1,472 | Wayne County |
| Chapmanville, Town Of | WV3302317 | CWS | Chapmanville | 1,589 | Logan County |
| Charles Town Utl-Cavaland Subdivision | WV3301972 | CWS | Martinsburg | 107 | Jefferson County |
| Charles Town Utl-Glen Haven Utilities | WV3301909 | CWS | Martinsburg | 195 | Jefferson County |
| Chemours Company-Washington Works | WV9954007 | NTNCWS | Washington | 1,500 | Wood County |
| Cherry Run Mhp | WV3300229 | CWS | Green Castle | 135 | Berkeley County |
| Chester Water Dept. | WV3301504 | CWS | Chester | 3,088 | Hancock County |
| Chestnut Ridge Psd | WV3300102 | CWS | Moatsville | 2,744 | Barbour County |
| Chestnut Ridge Psd - Berryburg | WV3300109 | CWS | Moatsville | 148 | Barbour County |
| Chestnut Ridge Water System | WV3300236 | CWS | Martinsburg | 104 | Berkeley County |
| Chpsd-Purgittsville | WV3301415 | CWS | Augusta | 205 | Hampshire County |
| Clay Co P S D - Ivydale | WV3300809 | CWS | Clay | 729 | Clay County |
| Clay Co P S D-Triplett Ridge | WV3300810 | CWS | Clay | 92 | Clay County |
| Clay Co Psd-Hartland | WV3300811 | CWS | Clay | 1,043 | Clay County |
| Clay Water Dept | WV3300801 | CWS | Clay | 1,232 | Clay County |
| Clay-Roane Psd (Procious District) | WV3300806 | CWS | Procious | 2,199 | Clay County, Roane County |
| Clinton Water Assoc - Kingwood Pike | WV3303128 | CWS | Charleston | 3,100 | Monongalia County |
| Clover Psd | WV3304409 | CWS | Spencer | 976 | Roane County |
| Coal Mountain Water | WV3305527 | CWS | Coal Mountain | 80 | Wyoming County |
| Coalton Water System | WV3304212 | CWS | Coalton | 262 | Randolph County |
| Constellium Rolled Products Llc | WV9918011 | NTNCWS | Ravenswood | 1,100 | Jackson County |
| Coons Run Psd | WV3301706 | CWS | West Milford | 1,059 | Harrison County, Marion County |
| Corporation Of Harpers Ferry | WV3301912 | CWS | Martinsburg | 2,122 | Jefferson County |
| Cottageville Psd | WV3301804 | CWS | Cottagville | 3,230 | Jackson County |
| Covestro | WV9925016 | NTNCWS | Proctor | 300 | Marshall County |
| Crum Psd | WV3305010 | CWS | Crum | 3,463 | Wayne County |
| Crumpler Community Water | WV3302448 | CWS | Welch | 170 | McDowell County |
| Danese Psd | WV3301008 | CWS | Layland | 2,294 | Fayette County |
| Davis Stuart Inc | WV3301303 | CWS | Lewisburg | 100 | Greenbrier County |
| Davis Water Works | WV3304701 | CWS | Davis | 952 | Tucker County |
| Davy Municipal Water Works | WV3302425 | CWS | Davy | 332 | McDowell County |
| Delbarton Town Of | WV3303011 | CWS | Delbarton | 277 | Mingo County |
| Denmar Correctional Center | WV3303804 | CWS | Hillsboro | 297 | Greenbrier County, Pocahontas County |
| Doddridge County Psd | WV3300902 | CWS | West Union | 48 | Doddridge County |
| Downs Psd | WV3302501 | CWS | Fairmont | 1,024 | Marion County |
| East View Psd 172 | WV3301737 | CWS | Clarksburg | 164 | Harrison County |
| East View Psd 194 | WV3301736 | CWS | Clarksburg | 381 | Harrison County |
| Eastern Panhandle Preparatory Academy | WV9919084 | NTNCWS | Parma | 300 | Jefferson County |
| Elizabeth Water Dept | WV3305302 | CWS | Elizabeth | 2,289 | Wirt County |
| Ellenboro Psd | WV3304302 | CWS | Harrisville | 456 | Ritchie County |
| Enlarged Hepzibah Psd | WV3301709 | CWS | Reynoldsville | 1,937 | Harrison County |
| F Mine Bathhouse | WV9912041 | NTNCWS | Oakland | 200 | Grant County |
| Fair Oaks Subdivision | WV3302534 | CWS | West Milford | 178 | Marion County |
| Fairview Town Of | WV3302503 | CWS | Fairview | 958 | Marion County |
| Faith Christian Academy | WV9902043 | NTNCWS | Hedgesville | 330 | Berkeley County |
| Faith Christian Academy - Campus #2 | WV9902048 | NTNCWS | Hedgesville | 25 | Berkeley County |
| Farmington Town Of | WV3302504 | CWS | Farmington | 699 | Marion County |
| Fenwick Mountain Psd | WV3303406 | CWS | Fenwick | 554 | Nicholas County |
| Flatwoods Canoe Run Psd Purchaser | WV3300409 | CWS | Sutton | 334 | Braxton County |
| Follansbee Municipal | WV3300506 | CWS | Follansbee | 3,145 | Brooke County |
| Fort Gay Water Works | WV3305004 | CWS | Fort Gay | 1,600 | Wayne County |
| Fountain Psd | WV3302942 | CWS | Keyser | 1,001 | Mineral County |
| Fountain Psd Burlington | WV3302949 | CWS | Keyser | 793 | Mineral County |
| Four States Psd | WV3302506 | CWS | Worthington | 403 | Harrison County, Marion County |
| Franklin Municipality Of | WV3303602 | CWS | Franklin | 1,402 | Pendleton County |
| G And E Mhp | WV3300201 | CWS | Inwood | 235 | Berkeley County |
| Gallipolis Ferry | WV3302703 | CWS | Gallipolis | 1,061 | Mason County |
| Gap Mills Psd | WV3303204 | CWS | Gap Mills | 480 | Monroe County |
| Gary City Of | WV3302420 | CWS | Gary | 1,633 | McDowell County |
| Gilbert Water Works | WV3303002 | CWS | Gilbert | 1,840 | Mingo County |
| Gilmer Co Psd | WV3301106 | CWS | Glenville | 803 | Gilmer County |
| Gilmer Co Psd - Route 33/119 | WV3301107 | CWS | Glenville | 425 | Gilmer County |
| Gilmer County Psd - Federal Prison | WV3301108 | CWS | Glenville | 1,884 | Gilmer County |
| Gilmer County Psd - Route 5 West | WV3301110 | CWS | Glenville | 95 | Gilmer County |
| Glancy Surface Mine | WV9903117 | NTNCWS | Oceana | 50 | Boone County, Logan County |
| Glen Alum Tunnel Water Plant | WV9941089 | NTNCWS | Oceana | 25 | Raleigh County |
| Glen Dale Water Works | WV3302605 | CWS | Glen Dale | 2,495 | Marshall County |
| Glenville Utility | WV3301104 | CWS | Glenville | 1,751 | Gilmer County |
| Global Capital Of World Peace | WV3301414 | CWS | Romney | 80 | Hampshire County |
| Grandview - Doolin Psd | WV3305206 | CWS | Proctor | 1,942 | Marshall County, Wetzel County |
| Grant Co Psd-Us 220 S | WV3301207 | CWS | Petersburg | 1,865 | Grant County |
| Grant County Psd Welton Orchard | WV3301209 | CWS | Petersburg | 229 | Grant County, Hardy County |
| Grant Town, Town Of | WV3302507 | CWS | Grant Town | 506 | Marion County |
| Grantsville Municipal | WV3300701 | CWS | Grantsville | 880 | Calhoun County |
| Greater Harrison Psd - Quiet Dell | WV3301719 | CWS | West Milford | 2,328 | Harrison County |
| Greater Harrison Psd Valley Of Good Hope | WV3301727 | CWS | West Milford | 2,744 | Harrison County |
| Green Bank School | WV9938019 | NTNCWS | Green Bank | 293 | Pocahontas County |
| Green Camp Psd | WV3305532 | CWS | Wyoming | 44 | Wyoming County |
| Green Valley Glenwood Psd Bulltail | WV3302813 | CWS | Bluefield | 2,130 | Mercer County |
| Greenbrier County Psd 2 | WV3301302 | CWS | Quinwood | 1,478 | Greenbrier County |
| Greenbrier Hotel Corporation | WV3301305 | CWS | White Sulphur Springs | 3,280 | Greenbrier County |
| Hammond Psd | WV3300508 | CWS | Wellsburg | 2,186 | Brooke County, Ohio County |
| Hamrick Psd | WV3304704 | CWS | Hendricks | 1,785 | Tucker County |
| Hardy County Psd 220 N | WV3301608 | CWS | Old Fields | 1,442 | Hardy County |
| Hardy County Psd 220 South | WV3301607 | CWS | Old Fields | 1,463 | Hardy County |
| Hardy County Psd Baker | WV3301613 | CWS | Old Fields | 150 | Hardy County |
| Hardy County Psd Marvin Chapel | WV3301612 | CWS | Old Fields | 90 | Hardy County |
| Hardy County Psd-Route 55 | WV3301610 | CWS | Old Fields | 908 | Hardy County |
| Hardy County Psd-South Fork | WV3301611 | CWS | Old Fields | 254 | Hardy County |
| Hardy County Psd-Trout Run | WV3301609 | CWS | Old Fields | 245 | Hardy County |
| Harman Town Of | WV3304204 | CWS | Harman | 456 | Randolph County |
| Harrisville | WV3304303 | CWS | Harrisville | 2,347 | Ritchie County |
| Hartford Town Of | WV3302704 | CWS | Hartford | 675 | Mason County |
| Haymond Psd | WV3304606 | CWS | Grafton | 1,393 | Taylor County |
| Hershel Woody Williams Vamc | WV9950086 | NTNCWS | Huntington | 1,759 | Wayne County |
| Hiawatha Water | WV3302814 | CWS | Matoaka | 63 | Mercer County |
| Hillsboro Town Of | WV3303815 | CWS | Hillsboro | 239 | Pocahontas County |
| Hodgesville Psd - Sauls Run | WV3304913 | CWS | Buckhannon | 151 | Upshur County |
| Hodgesville Psd Lorentz System | WV3304912 | CWS | Buckhannon | 376 | Upshur County |
| Hodgesville Psd Rt 20 | WV3304908 | CWS | Buckhannon | 2,161 | Upshur County |
| Huff Consolidated Elementary And Middle | WV3305542 | NTNCWS | Pineville | 275 | Wyoming County |
| Hughes River Water | WV3304307 | CWS | Harrisville | 1 | Ritchie County |
| Hundred Littleton Psd | WV3305202 | CWS | Hundred | 638 | Wetzel County |
| Hutchinson Community Water Assoc | WV3302531 | CWS | Shinnston | 353 | Marion County |
| Huttonsville Town Of | WV3304206 | CWS | Dailey | 186 | Randolph County |
| I Heart Church | WV9941085 | NTNCWS | Mount Hope | 1,000 | Raleigh County |
| Ices Run Psd | WV3302508 | CWS | Fairmont | 1,149 | Marion County |
| Jane Lew Psd | WV3302103 | CWS | Jane Lew | 1,440 | Lewis County |
| Judy Lynn Mhp | WV3300204 | CWS | Martinsburg | 53 | Berkeley County |
| Justice Psd | WV3303014 | CWS | Naugatuck | 504 | Mingo County |
| Kanawha Eagle Coal Companies | WV9920095 | NTNCWS | Oceana | 50 | Kanawha County |
| Kanawha Falls Psd | WV3301037 | CWS | Gauley Bridge | 2,547 | Fayette County |
| Kermit Water Works | WV3303003 | CWS | Kermit | 1,237 | Mingo County, Wayne County |
| Knobley Water System | WV3302946 | CWS | Keyser | 132 | Mineral County |
| Lavalette Psd - Eastern District | WV3305012 | CWS | Lavalette | 1,220 | Wayne County |
| Lavalette Psd-Route 52 North District | WV3305011 | CWS | Lavalette | 1,179 | Wayne County |
| Leadsville Psd | WV3304215 | CWS | Elkins | 1,536 | Randolph County |
| Leights Mhp | WV3301920 | CWS | Kearneysville | 78 | Jefferson County |
| Lester Municipal Water Works | WV3304115 | CWS | Lester | 665 | Raleigh County |
| Lincoln Psd - Lower Mud River | WV3302208 | CWS | Alum Creek | 191 | Lincoln County |
| Lincoln Psd - Route 3 | WV3302207 | CWS | Alum Creek | 2,226 | Lincoln County |
| Little Creek Psd | WV3302510 | CWS | Fairmont | 2,180 | Marion County, Monongalia County |
| Little Learners Village Llc | WV9933058 | NTNCWS | Hedgesville | 50 | Morgan County |
| Logan Co P S D - Crawley Creek | WV3302363 | CWS | Logan | 2,145 | Logan County |
| Logan Co Psd - Stollings | WV3302341 | CWS | Logan | 861 | Logan County |
| Logan Co Psd-Rum Creek | WV3302355 | CWS | Logan | 881 | Logan County |
| Lumberport Town Of | WV3301714 | CWS | Lumberport | 1,519 | Harrison County |
| Mannington City Of | WV3302513 | CWS | Mannington | 1,946 | Marion County |
| Mannington Psd - Logansport | WV3302532 | CWS | Mannington | 142 | Marion County |
| Mannington Psd - Metz | WV3302536 | CWS | Mannington | 832 | Marion County |
| Marion County Coal Resources, Inc | WV9931030 | NTNCWS | St. Clairsville | 50 | Marion County, Monongalia County |
| Marlinton Town Of | WV3303803 | CWS | Marlinton | 1,930 | Pocahontas County |
| Marshall County Psd 2 | WV3302607 | CWS | Moundsville | 1,601 | Marshall County |
| Marshall County Psd 3 | WV3302608 | CWS | Moundsville | 2,694 | Marshall County |
| Mason Co Psd - Ashton | WV3302717 | CWS | Point Pleasant | 3,902 | Mason County |
| Mason Co Psd-Foglesong Dist | WV3302715 | CWS | Point Pleasant | 156 | Mason County |
| Mason Co Psd-Letart | WV3302713 | CWS | Point Pleasant | 3,303 | Mason County |
| Mason County Psd-Camp Conley | WV3302702 | CWS | Point Pleasant | 497 | Mason County |
| Mason Water Dept | WV3302708 | CWS | Mason | 1,679 | Mason County |
| Masontown Water Works | WV3303909 | CWS | Masontown | 2,239 | Monongalia County, Preston County |
| Matewan Water Works | WV3303005 | CWS | Matewan | 2,205 | Mingo County |
| Mcdowell County Psd Bartley | WV3302434 | CWS | Welch | 2,242 | McDowell County |
| Mcdowell County Psd Berwind | WV3302435 | CWS | Welch | 692 | McDowell County |
| Mcdowell County Psd Bishop | WV3302475 | CWS | Welch | 50 | McDowell County |
| Mcdowell County Psd Bradshaw | WV3302437 | CWS | Welch | 163 | McDowell County |
| Mcdowell County Psd Coalwood | WV3302439 | CWS | Welch | 1,537 | McDowell County |
| Mcdowell County Psd Eckman | WV3302405 | CWS | Welch | 118 | McDowell County |
| Mcdowell County Psd Greenbrier | WV3302465 | CWS | Welch | 165 | McDowell County, Mercer County |
| Mcdowell County Psd Havaco | WV3302440 | CWS | Welch | 370 | McDowell County |
| Mcdowell County Psd Hemphill | WV3302441 | CWS | Welch | 322 | McDowell County |
| Mcdowell County Psd Kimball | WV3302431 | CWS | Welch | 432 | McDowell County |
| Mcdowell County Psd Maybeury | WV3302460 | CWS | Welch | 1,648 | McDowell County |
| Mcdowell County Psd Premier | WV3302411 | CWS | Welch | 122 | McDowell County |
| Mcdowell County Psd Tidewater | WV3302407 | CWS | Welch | 113 | McDowell County |
| Mcdowell County Psd-Big Four | WV3302471 | CWS | Welch | 363 | McDowell County |
| Mcmechen Municipal Water | WV3302610 | CWS | Mcmechen | 2,212 | Marshall County |
| Meadow Bridge Town Of | WV3301022 | CWS | Meadow Bridge | 692 | Fayette County, Summers County |
| Middlebourne Water Works | WV3304802 | CWS | Middlebourne | 1,267 | Tyler County |
| Mill Creek Water Dept | WV3304209 | CWS | Mill Creek | 591 | Randolph County |
| Mingo Co Psd - Ragland District | WV3303013 | CWS | Naugatuck | 621 | Mingo County |
| Mingo County Psd - Chattaroy | WV3303001 | CWS | Naugatuck | 223 | Mingo County |
| Mingo County Psd - Delorme | WV3303030 | CWS | Naugatuck | 64 | Mingo County |
| Mingo County Psd - Lick Creek | WV3303032 | CWS | Williamson | 380 | Mingo County |
| Mingo County Psd - Marrowbone | WV3303033 | CWS | Naugatuck | 292 | Mingo County |
| Mingo County Psd - Pigeon Creek | WV3303031 | CWS | Naugatuck | 2,877 | Mingo County |
| Ministers Run Water Assoc | WV3302514 | CWS | Rivesville | 351 | Marion County |
| Mitchell Plant | WV9925015 | NTNCWS | Moundsville | 250 | Marshall County |
| Monongah Town Of | WV3302515 | CWS | Monongah | 3,226 | Marion County |
| Monumental Psd | WV3302517 | CWS | Fairmont | 1,965 | Marion County |
| Monumental Psd - Chesapeake | WV3302533 | CWS | Fairmont | 95 | Marion County |
| Moorefield Municipal Water | WV3301601 | CWS | Moorefield | 2,328 | Hardy County |
| Morgan Co Industrial Park | WV9933052 | NTNCWS | Hancock | 40 | Morgan County |
| Morgan County Early Childhood Center | WV9933016 | NTNCWS | Berkeley Springs | 30 | Morgan County |
| Morgan Village Mhp | WV3303334 | CWS | Martinsburg | 98 | Morgan County |
| Mount Hope Water | WV3301024 | CWS | Mt. Hope | 1,567 | Fayette County, Raleigh County |
| Mount Hope Water Assoc | WV3304905 | CWS | Tallsmanville | 2,870 | Upshur County |
| Mount Zion P S D | WV3300702 | CWS | Grantsville | 1,163 | Calhoun County |
| Mountain Top Psd | WV3301205 | CWS | Mount Storm | 2,072 | Grant County, Mineral County |
| Mountain View Water Assoc | WV3304602 | CWS | Grafton | 2,306 | Taylor County |
| National Radio Astronomy Observatory | WV9938029 | NTNCWS | Green Bank | 105 | Pocahontas County |
| Nettie Leivasy Psd | WV3303403 | CWS | Nettie | 3,630 | Nicholas County |
| New Creek Water Association | WV3302920 | CWS | New Creek | 3,163 | Mineral County |
| New Cumberland, City Of | WV3301515 | CWS | New Cumberland | 1,326 | Hancock County |
| New Haven Water Dept | WV3302709 | CWS | New Haven | 1,649 | Mason County |
| Newburg Town Of | WV3303920 | CWS | Newburg | 1,133 | Preston County |
| North Lakes Subdivision | WV3304712 | CWS | Davis | 25 | Tucker County |
| Northern Jackson County Psd | WV3301814 | CWS | Sandyville | 2,506 | Jackson County |
| Northrup Grumman Innovation Systems, Inc | WV9929007 | NTNCWS | Rocket Center | 1,705 | Mineral County |
| Norton Harding Jimtown Psd | WV3304213 | CWS | Coalton | 1,632 | Randolph County |
| Nutter Fort Town Of | WV3301717 | CWS | Nutter Fort | 1,863 | Harrison County |
| Oak Hill Mobile Home Community Llc | WV3301949 | CWS | Banner Elk | 172 | Jefferson County |
| Oakland Psd | WV3301517 | CWS | Weirton | 1,659 | Hancock County |
| Oakland Psd Golden Key Acres | WV3301525 | CWS | Weirton | 506 | Hancock County |
| Oceana Community Of | WV3305516 | CWS | Oceana | 3,796 | Wyoming County |
| Ohio County Psd No 2 | WV3303519 | CWS | Triadelphia | 1,153 | Ohio County |
| Ohio County Psd No 4 | WV3303521 | CWS | Triadelphia | 46 | Ohio County |
| Ohio County Psd No 5 | WV3303522 | CWS | Triadelphia | 90 | Ohio County |
| Ohio County Psd No. 3 | WV3303520 | CWS | Triadelphia | 2,657 | Ohio County |
| Ohio County Psd No. 6 | WV3303523 | CWS | Triadelphia | 55 | Ohio County |
| Paden City, City Of | WV3305204 | CWS | Paden City | 3,291 | Tyler County, Wetzel County |
| Page Jackson Solar Elem | WV9919032 | NTNCWS | Charles Town | 450 | Jefferson County |
| Panther Eagle Mine | WV9941087 | NTNCWS | Oceana | 25 | Raleigh County |
| Parsons City Of | WV3304707 | CWS | Parsons | 1,461 | Tucker County |
| Paw Paw Route 19 Psd | WV3302518 | CWS | Westover | 1,257 | Marion County, Monongalia County |
| Paw Paw Water Works | WV3303308 | CWS | Paw Paw | 524 | Morgan County |
| Pax Water Company | WV3301026 | CWS | Pax | 762 | Fayette County |
| Pendleton Co Psd(Brandywine) | WV3303613 | CWS | Franklin | 692 | Pendleton County |
| Pendleton Co Psd-Circleville | WV3303609 | CWS | Upper Tract | 84 | Pendleton County |
| Pendleton Co Psd-Upper Tract | WV3303611 | CWS | Franklin | 633 | Pendleton County |
| Pendleton Co Psd-Us 220 North | WV3303608 | CWS | Franklin | 156 | Pendleton County |
| Pendleton County Psd Riverton | WV3303614 | CWS | Franklin | 130 | Pendleton County |
| Petersburg Town Of | WV3301204 | CWS | Petersburg | 2,841 | Grant County |
| Philippi City Of | WV3300104 | CWS | Philippi | 3,544 | Barbour County |
| Philippi City Of - Wellington Heights | WV3300108 | CWS | Philippi | 246 | Barbour County |
| Piedmont Municipal Wtr Wks | WV3302921 | CWS | Piedmont | 847 | Mineral County |
| Pine Grove Water | WV3305205 | CWS | Pine Grove | 620 | Wetzel County |
| Pineville Municipal Water | WV3305517 | CWS | Pineville | 2,162 | Wyoming County |
| Pinnacle Water Association | WV3302828 | CWS | Rock | 85 | Mercer County |
| Pleasant Hill P S D Rt 16 District | WV3300703 | CWS | Big Bend | 1,868 | Calhoun County, Ritchie County |
| Pleasant Valley Psd | WV3303112 | CWS | Maidesville | 2,231 | Monongalia County |
| Pleasant Valley Psd - North Cassville | WV3303130 | CWS | Maidesville | 114 | Monongalia County |
| Pleasant View Elementary | WV9933025 | NTNCWS | Berkeley Springs | 135 | Morgan County |
| Pocahontas Co Psd - Cheat Mountain Water | WV3303808 | CWS | Durbin | 1,867 | Pocahontas County |
| Pocahontas County High School | WV9938035 | NTNCWS | Dunmore | 334 | Pocahontas County |
| Pocahontas County Psd | WV3303812 | CWS | Durbin | 504 | Pocahontas County |
| Pocahontas Memorial And Marlinton M S | WV9938066 | NTNCWS | Buckeye | 362 | Pocahontas County |
| Potomac Farms Water Co | WV3301947 | CWS | Charles Town | 27 | Jefferson County |
| Preston Co Psd 1 Purchaser | WV3303924 | CWS | Hopwood | 291 | Preston County |
| Rainelle Water Dept | WV3301309 | CWS | Rainelle | 1,381 | Greenbrier County |
| Rainelle Water Treatment Plant 2 | WV3301312 | CWS | Rainelle | 290 | Greenbrier County |
| Raleigh County Psd Clear Creek | WV3304151 | CWS | Sophia | 1,407 | Raleigh County |
| Raleigh County Psd Coal City | WV3304123 | CWS | Sophia | 3,415 | Raleigh County |
| Raleigh County Psd Egeria | WV3302857 | CWS | Sophia | 200 | Mercer County |
| Raleigh County Psd Fitzpatrick | WV3304144 | CWS | Sophia | 197 | Raleigh County |
| Raleigh County Psd Odd | WV3304150 | CWS | Sophia | 813 | Raleigh County |
| Raleigh County Psd Pluto Bragg | WV3304152 | CWS | Sophia | 383 | Raleigh County |
| Raleigh County Psd Slab Fork | WV3304120 | CWS | Sophia | 550 | Raleigh County |
| Raleigh County Psd-South Sand Branch | WV3304153 | CWS | Sophia | 60 | Raleigh County |
| Ravencliff Mcgraws Saulsville Psd | WV3305518 | CWS | Glen Fork | 3,967 | Wyoming County |
| Rayford Acres | WV3302529 | CWS | Fairmont | 194 | Marion County |
| Reamer Hill Water Assoc | WV3302077 | CWS | Clendenin | 60 | Kanawha County |
| Reedy Water Service Town Of | WV3304408 | CWS | Reedy | 480 | Roane County |
| Renick, Town Of | WV3301328 | CWS | Frankford | 79 | Greenbrier County |
| Reynolds Memorial Hospital | WV9925045 | NTNCWS | Glen Dale | 585 | Marshall County |
| Richwood Water Dept | WV3303401 | CWS | Richwood | 2,480 | Nicholas County |
| Ridgeley, Town Of | WV3302923 | CWS | Ridgeley | 737 | Mineral County, Preston County |
| Ridgeview Estates Prop Assoc | WV3302361 | CWS | Logan | 69 | Logan County |
| River Bend Membership Corporation | WV9902029 | NTNCWS | Hagerstown | 2,500 | Berkeley County |
| Rivesville Town Of | WV3302519 | CWS | Rivesville | 1,267 | Marion County |
| Roane-Jackson Technical Center | WV9918002 | NTNCWS | Leroy | 450 | Jackson County |
| Rock Spring Church | WV9919090 | NTNCWS | Kearneysville | 120 | Jefferson County |
| Rocklick Plant | WV9903092 | NTNCWS | Wharton | 30 | Boone County |
| Rocky Glen Manufactured Housing Communit | WV3300231 | CWS | Martinsburg | 861 | Berkeley County |
| Rocky Knoll Elementary | WV9902021 | NTNCWS | Falling Waters | 68 | Berkeley County |
| Romney Water Dept | WV3301405 | CWS | Romney | 1,911 | Hampshire County |
| Ronceverte Water | WV3301310 | CWS | Ronceverte | 2,091 | Greenbrier County |
| Rowlesburg Water Works | WV3303914 | CWS | Rowlesburg | 680 | Preston County |
| Rupert Water | WV3301311 | CWS | Rupert | 1,170 | Greenbrier County |
| Russells Mhp | WV3301929 | CWS | Kearneysville | 75 | Jefferson County |
| Saint Marys | WV3303704 | CWS | St Marys | 2,711 | Pleasants County |
| Salem Water Board | WV3301720 | CWS | Salem | 1,630 | Harrison County |
| Seneca Trail Christian Academy | WV9913074 | NTNCWS | Ronceverte | 100 | Greenbrier County |
| Shepherdstown Elementary School | WV9919101 | NTNCWS | Charles Town | 450 | Jefferson County |
| Shinnston - Saltwell Road | WV3301741 | CWS | Shinnston | 205 | Harrison County |
| Sistersville Municipal Water | WV3304803 | CWS | New Martinsville | 1,892 | Tyler County |
| Sky Line Village Mhp | WV3303310 | CWS | Glen Allen | 120 | Morgan County |
| Smoot Elementary | WV9913059 | NTNCWS | Lewisburg | 165 | Greenbrier County |
| South Jefferson Elementary | WV9919037 | NTNCWS | Charles Town | 424 | Jefferson County |
| Southern Jackson County Psd Route 33 | WV3301819 | CWS | Kenna | 170 | Jackson County |
| Springer Run Park Llc | WV3300243 | CWS | Hedgesville | 150 | Berkeley County |
| Stonewood City Of | WV3301724 | CWS | Stonewood | 2,236 | Harrison County |
| Sugar Grove Research Station | WV9936053 | NTNCWS | Franklin | 70 | Pendleton County |
| Sugar Lane Water Assoc | WV3302520 | CWS | Rivesville | 204 | Marion County |
| Summit Point Tactical Training Center | WV9919091 | NTNCWS | Summit Point | 125 | Jefferson County |
| Sun Valley Psd | WV3301726 | CWS | Reynoldsville | 2,905 | Harrison County |
| Sunny View Acres Water Project | WV3302521 | CWS | Farmington | 69 | Marion County |
| Taylor County Psd | WV3304605 | CWS | Grafton | 1,322 | Taylor County |
| Terra Alta Water Works | WV3303917 | CWS | Terra Alta | 1,856 | Preston County |
| Thomas City Of | WV3304709 | CWS | Thomas | 753 | Tucker County |
| Timberline-Cv Psd | WV3304711 | CWS | Davis | 577 | Tucker County |
| Tomlinson Psd | WV3301519 | CWS | Chester | 2,079 | Hancock County |
| Tomlinson Psd-Newell | WV3301516 | CWS | Chester | 4,963 | Hancock County |
| Town Of Capon Bridge Inc | WV3301402 | CWS | Capon Bridge | 700 | Hampshire County |
| Tri County Clarksburg | WV3301742 | CWS | Shinnston | 919 | Harrison County |
| Tri Lake Holdings, Inc. | WV3303317 | CWS | Martinsburg | 139 | Morgan County |
| Tri-County Water Assoc - Fairmont | WV3302522 | CWS | Shinnston | 1,880 | Marion County, Taylor County |
| Triadelphia Water Dept | WV3303512 | CWS | Triadelphia | 979 | Ohio County |
| Tunnelton Town Of | WV3303918 | CWS | Tunnelton | 1,346 | Preston County |
| Tyler County Psd | WV3304801 | CWS | Friendly | 3,195 | Tyler County, Wetzel County |
| Union Town Of | WV3303207 | CWS | Union | 758 | Monroe County |
| Us Fish & Wildlife-Nctc | WV9919081 | NTNCWS | Shepherdstown | 150 | Jefferson County |
| Usda Appalachian Fruit Research Station | WV9919002 | NTNCWS | Kearneysville | 70 | Jefferson County |
| Usgs Leetown Science Center | WV9919044 | NTNCWS | Kearneysville | 105 | Jefferson County |
| Va Medical Center | WV3300227 | CWS | Martinsburg | 2,175 | Berkeley County |
| Valley Grove Water Dept | WV3303513 | CWS | Valley Grove | 610 | Ohio County |
| Walton Psd | WV3304407 | CWS | Walton | 2,208 | Roane County |
| War Water Works City Realty | WV3302472 | CWS | War | 1,220 | McDowell County |
| Wardensville, Town Of | WV3301603 | CWS | Wardensville | 788 | Hardy County |
| Welch City Of | WV3302421 | CWS | Welch | 2,907 | McDowell County, Wyoming County |
| West Hamlin, City Of | WV3302203 | CWS | West Hamlin | 2,465 | Lincoln County |
| West Logan Water Co | WV3302343 | CWS | Logan | 908 | Logan County |
| West Milford Water Works | WV3301728 | CWS | West Milford | 645 | Harrison County |
| West Union, Town Of | WV3300901 | CWS | West Union | 1,895 | Doddridge County |
| Westlake Chemical | WV9925020 | NTNCWS | Proctor | 435 | Marshall County |
| Wetzel Co Psd 1 | WV3305207 | CWS | Reader | 1,378 | Wetzel County |
| Whitmer Public Water System | WV3304216 | CWS | Valley Head | 254 | Randolph County |
| Williamson Utility Board | WV3303009 | CWS | Williamson | 2,660 | Mingo County |
| Woods Home Owners Association 2 | WV3300237 | CWS | Martinsburg | 3,300 | Berkeley County |
| Worthington Town Of | WV3302524 | CWS | Worthington | 598 | Marion County |
| Wvaw - Apple Orchard Acres | WV3303314 | CWS | Charleston | 91 | Morgan County |
| Wvaw - Cave Quarter Utility | WV3301904 | CWS | Charleston | 126 | Jefferson County |
| Wvaw - Deerfield Village Subdivision | WV3301979 | CWS | Charleston | 132 | Jefferson County |
| Wvaw - Gassaway | WV3300406 | CWS | Charleston | 2,159 | Braxton County |
| Wvaw - The Mountain Water System | WV3301963 | CWS | Charleston | 976 | Jefferson County |
| Wvaw - Valley Water And Sewer-Deerwood | WV3300230 | CWS | Charleston | 219 | Berkeley County |
| Wvawc 5 And 20 Mile Road District | WV3304020 | CWS | Charleston | 78 | Putnam County |
| Wvawc Glade Springs District | WV3304111 | CWS | Charleston | 1,747 | Raleigh County |
| Wvdot Summers County | WV9945040 | NTNCWS | Nimitz | 25 | Summers County |