1,367 community and non-transient non-community water systems are listed for Indiana in EPA SDWIS. 230 were sampled under UCMR 5; 55 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).
Indiana 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 (230)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Aberdeen Pate Water Company, Inc. | IN5258001 | Aurora | 4,787 | <MRL | <MRL | 0 | No PFAS detected |
| Alexandria Water Department | IN5248001 | Alexandria | 5,149 | <MRL | <MRL | 0 | No PFAS detected |
| Anderson Water Department | IN5248002 | Anderson | 55,212 | <MRL | 4.1 | 0 | PFOS 1–3 × its limit |
| Angola Water Department | IN5276001 | Angola | 9,340 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Apple Valley Utilities, Inc. | IN5245001 | Indianapolis | 712 | <MRL | <MRL | 0 | No PFAS detected |
| Auburn Water Department | IN5217001 | Auburn | 12,800 | <MRL | <MRL | 0 | No PFAS detected |
| Aurora Utilities | IN5215001 | Aurora | 6,415 | <MRL | <MRL | 0 | No PFAS detected |
| B&B Water Project, Inc. | IN5253001 | Bloomington | 4,695 | <MRL | <MRL | 0 | No PFAS detected |
| Bargersville Water Department | IN5241001 | Bargersville | 34,418 | <MRL | <MRL | 0 | Other PFAS detected |
| Batesville Water Utility | IN5269001 | Batesville | 7,323 | <MRL | <MRL | 0 | Other PFAS detected |
| Bbp Water Company | IN5260001 | Spencer | 9,903 | <MRL | <MRL | 0 | No PFAS detected |
| Bedford City Utilities | IN5247001 | Bedford | 14,000 | <MRL | <MRL | 0 | No PFAS detected |
| Berne Water Department | IN5201001 | Berne | 4,388 | <MRL | <MRL | 0 | No PFAS detected |
| Bicknell Municipal Utilities | IN5242001 | Bicknell | 4,064 | <MRL | <MRL | 0 | No PFAS detected |
| Bluffton Utilities Water Dept | IN5290001 | Bluffton | 10,298 | <MRL | <MRL | 0 | No PFAS detected |
| Borden Tri-County Region | IN5210002 | Borden | 11,000 | <MRL | <MRL | 0 | No PFAS detected |
| Brazil City Water Works | IN5211001 | Brazil | 12,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bremen Water Department | IN5250003 | Bremen | 4,516 | <MRL | <MRL | 0 | No PFAS detected |
| Brown County Water Utility | IN5207001 | Morgantown | 15,368 | 12.9 | 10.5 | 0.002 | PFOA ≥ 3 × its limit |
| Brownsburg Water Works | IN5232002 | Brownsburg | 31,250 | <MRL | <MRL | 0 | Other PFAS detected |
| Camp Atterbury | IN5241015 | Edinburgh | 5,300 | <MRL | <MRL | 0 | No PFAS detected |
| Canaan Utilities | IN5239001 | Canaan | 4,428 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Carmel Water Department | IN5229004 | Carmel | 99,927 | <MRL | <MRL | 0 | No PFAS detected |
| Cedar Lake Water Works | IN5245047 | Cedar Lake | 4,600 | <MRL | <MRL | 0 | No PFAS detected |
| Chandler Water Works Department | IN5287002 | Chandler | 20,120 | <MRL | <MRL | 0 | No PFAS detected |
| Charlestown/River Ridge | IN2100018 | Jeffersonville | 10,500 | <MRL | <MRL | 0 | No PFAS detected |
| Cicero Water Department | IN5229005 | Elwood | 5,607 | <MRL | <MRL | 0 | No PFAS detected |
| Citizens Water - Indianapolis | IN5249004 | Indianapolis | 880,345 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Citizens Water - Morgan | IN5255019 | Indianapolis | 5,705 | <MRL | <MRL | 0 | No PFAS detected |
| Citizens Water - Whitestown | IN5206014 | Indianapolis | 15,695 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Citizens Water Of Westfield, Llc | IN5229009 | Indianapolis | 61,493 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Bloomington Utilities | IN5253002 | Bloomington | 83,000 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Boonville | IN5287001 | Boonville | 10,260 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Greendale Utilities | IN5215003 | Greendale | 5,092 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Lawrence Utilities | IN5249005 | Indianapolis | 49,000 | <MRL | <MRL | 0 | No PFAS detected |
| Clinton Water Utility | IN5283004 | Clinton | 4,773 | <MRL | <MRL | 0.562 | Hazard Index below its limit |
| Columbia City Water Department | IN5292004 | Columbia City | 9,892 | <MRL | <MRL | 0 | No PFAS detected |
| Columbus Municipal Utility | IN5203002 | Columbus | 51,122 | <MRL | <MRL | 0.005 | Hazard Index below its limit |
| Connersville Utilities | IN5221001 | Connersville | 13,282 | <MRL | <MRL | 0 | No PFAS detected |
| Cordry Sweetwater Conservancy District | IN5207004 | Nineveh | 3,425 | <MRL | <MRL | 0 | No PFAS detected |
| Corydon Water Works | IN5231001 | Corydon | 5,716 | <MRL | <MRL | 0 | No PFAS detected |
| Crown Point Water Works | IN5245008 | Crown Point | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Cuii - Indiana Water Service | IN5245057 | Crown Point | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Cuii - Twin Lakes | IN5245046 | Crown Point | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| Danville Water Works | IN5232004 | Danville | 10,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Daviess County Rural Water | IN5214002 | Washington | 7,969 | <MRL | <MRL | 0 | No PFAS detected |
| Decatur Water Department | IN5201002 | Decatur | 9,900 | <MRL | <MRL | 0 | No PFAS detected |
| Dubois Water Utilities | IN5219002 | Dubois | 9,078 | <MRL | <MRL | 0 | No PFAS detected |
| Dupont Water Company | IN5240004 | Commiskey | 3,865 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Dyer Water Department | IN5245011 | Dyer | 16,800 | <MRL | <MRL | 0 | No PFAS detected |
| East Chicago Water Works | IN5245012 | East Chicago | 26,370 | <MRL | <MRL | 0 | No PFAS detected |
| East Fork Water | IN5251004 | Shoals | 3,485 | <MRL | <MRL | 0 | No PFAS detected |
| East Lawrence Water Authority | IN5247002 | Bedford | 8,000 | <MRL | <MRL | 0 | No PFAS detected |
| East Monroe Water Corporation | IN5253003 | Bloomington | 3,648 | <MRL | <MRL | 0 | No PFAS detected |
| East Tippecanoe Middle School | IN2790009 | Lafayette | 589 | <MRL | <MRL | 0 | No PFAS detected |
| East Washington Rural Water | IN5288002 | Salem | 8,613 | <MRL | <MRL | 0 | No PFAS detected |
| Eastern Bartholomew Water | IN5203004 | Taylorsville | 13,547 | <MRL | <MRL | 0 | No PFAS detected |
| Eastern Heights Utilities | IN5228003 | Bloomfield | 19,028 | <MRL | <MRL | 0 | No PFAS detected |
| Edinburgh Water Utility | IN5241002 | Edinburgh | 4,480 | <MRL | <MRL | 0 | No PFAS detected |
| Edwardsville Water Corporation | IN5222001 | Georgetown | 10,442 | <MRL | <MRL | 0 | No PFAS detected |
| Elkhart Public Works And Utilities | IN5220008 | Elkhart | 46,455 | 5.2 | <MRL | 0.88 | PFOA 1–3 × its limit |
| Ellettsville Water Works | IN5253004 | Ellettsville | 14,500 | <MRL | <MRL | 0 | No PFAS detected |
| Elwood Water & Sewage | IN5248007 | Elwood | 8,586 | <MRL | <MRL | 0 | No PFAS detected |
| Evansville Water Utility | IN5282002 | Henderson | 182,444 | <MRL | <MRL | 0 | No PFAS detected |
| Fairview Park Water Utilities | IN5283006 | Clinton | 1,386 | <MRL | <MRL | 0 | No PFAS detected |
| Fayette Township Water Assn. | IN5284002 | Clinton | 2,000 | <MRL | <MRL | 0 | No PFAS detected |
| Finch Newton Water, Inc. | IN5274003 | Chrisney | 2,672 | <MRL | <MRL | 0 | No PFAS detected |
| Floyds Knobs Water Company, Inc. | IN5222002 | Greenville | 6,690 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Branch Water Department | IN5226001 | Fort Branch | 4,020 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Wayne - 3 Rivers Filtration Plant | IN5202020 | Fort Wayne | 269,994 | <MRL | <MRL | 0 | Other PFAS detected |
| Fortville Water Works | IN5230003 | Fortville | 7,638 | <MRL | <MRL | 0 | No PFAS detected |
| Frankfort Water Works | IN5212003 | Frankfort | 16,422 | <MRL | <MRL | 0 | No PFAS detected |
| Franklin County Water Association | IN5224002 | Brookville | 8,200 | <MRL | <MRL | 0 | No PFAS detected |
| Galveston Water Works | IN5209003 | Galveston | 1,258 | <MRL | <MRL | 0 | No PFAS detected |
| Garrett Water Utility | IN5217004 | Garrett | 6,390 | <MRL | <MRL | 0 | No PFAS detected |
| Gas City Water Department | IN5227006 | Gas City | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| German Township Water District Inc. | IN5282003 | Evansville | 12,890 | <MRL | <MRL | 0 | Other PFAS detected |
| Gibson Water Authority | IN5226009 | Haubstadt | 4,835 | 4.9 | <MRL | 0 | PFOA 1–3 × its limit |
| Goshen Water Utility | IN5220009 | Goshen | 32,267 | <MRL | <MRL | 0 | Other PFAS detected |
| Greencastle Department Of Water | IN5267004 | Greencastle | 12,699 | <MRL | <MRL | 0 | No PFAS detected |
| Greenfield Water Utility | IN5230004 | Greenfield | 26,671 | <MRL | <MRL | 0 | No PFAS detected |
| Greensburg Municipal Water Works | IN5216002 | Greensburg | 12,650 | <MRL | <MRL | 0 | No PFAS detected |
| Greenville Water Utility | IN5222004 | Greenville | 4,920 | 7.2 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Griffith Water Department | IN5245019 | Griffith | 16,893 | <MRL | <MRL | 0 | No PFAS detected |
| Hammond Water Works Department | IN5245020 | Hammond | 78,384 | <MRL | <MRL | 0 | No PFAS detected |
| Hanover Water Department | IN5239003 | Hanover | 2,597 | 6.3 | 4.1 | 0.003 | PFOA 1–3 × its limit |
| Hartford City Water Works | IN5205002 | Hartford City | 5,600 | <MRL | <MRL | 0 | No PFAS detected |
| Hebron Water Department | IN5264009 | Hebron | 3,724 | <MRL | <MRL | 0 | No PFAS detected |
| Highland Water Works | IN5245021 | Highland | 23,984 | <MRL | <MRL | 0 | No PFAS detected |
| Hill Water Corporation | IN5255021 | Mooresville | 8,200 | <MRL | <MRL | 0 | No PFAS detected |
| Hoosier Hills Regional Water District | IN5269002 | Milan | 8,660 | <MRL | <MRL | 0 | No PFAS detected |
| Huntertown Water Works | IN5202007 | Fort Wayne | 14,058 | <MRL | <MRL | 0 | No PFAS detected |
| Huntingburg Municipal Water | IN5219007 | Huntingburg | 6,526 | <MRL | <MRL | 0 | No PFAS detected |
| Huntington Water Department | IN5235005 | Huntington | 17,300 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Charlestown | IN5210003 | Greenwood | 8,658 | 13.4 | <MRL | 0 | PFOA ≥ 3 × its limit |
| Indiana American Water - Crawfordsville | IN5254005 | Greenwood | 15,930 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Indiana American Water - Georgetown | IN5222003 | Greenwood | 3,605 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Johnson County | IN5241005 | Greenwood | 86,813 | <MRL | <MRL | 0 | Other PFAS detected |
| Indiana American Water - Kokomo | IN5234007 | Greenwood | 59,313 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Lowell | IN5245029 | Greenwood | 11,908 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Mooresville | IN5255006 | Greenwood | 10,083 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Muncie | IN5218012 | Greenwood | 74,030 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Newburgh | IN5287004 | Newburgh | 22,215 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Noblesville | IN5229015 | Greenwood | 45,575 | <MRL | <MRL | 0 | Other PFAS detected |
| Indiana American Water - Northwest | IN5245015 | Greenwood | 210,510 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Richmond | IN5289012 | Greenwood | 41,485 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - S. Indiana | IN5210005 | Greenwood | 104,445 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Seymour | IN5236005 | Greenwood | 20,725 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Shelbyville | IN5273002 | Greenwood | 19,093 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Sullivan | IN5277009 | Greenwood | 6,598 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Terre Haute | IN5284012 | Greenwood | 67,765 | <MRL | 5.2 | 0.002 | PFOS 1–3 × its limit |
| Indiana American Water - Wabash | IN5285003 | Greenwood | 12,140 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Warsaw | IN5243030 | Greenwood | 13,835 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Indiana American Water - West Lafayette | IN5279020 | Greenwood | 35,533 | <MRL | <MRL | 0 | No PFAS detected |
| Indiana American Water - Winchester | IN5268003 | Greenwood | 5,405 | <MRL | <MRL | 0 | No PFAS detected |
| Ingalls Water Company | IN5248012 | Ingalls | 7,600 | <MRL | <MRL | 0 | No PFAS detected |
| Ireland Utilities, Inc. | IN5219008 | Ireland | 4,395 | <MRL | <MRL | 0 | Other PFAS detected |
| Jackson County Water Utility | IN5236003 | Brownstown | 13,667 | 6 | 5.1 | 0 | PFOA 1–3 × its limit |
| Jasonville Water Department | IN5228004 | Jasonville | 3,660 | <MRL | <MRL | 0 | No PFAS detected |
| Jasper Municipal Water Utility | IN5219009 | Jasper | 17,440 | <MRL | <MRL | 0 | Other PFAS detected |
| Jennings Water, Inc. | IN5240006 | North Vernon | 8,370 | <MRL | <MRL | 0 | No PFAS detected |
| Kendallville Water Department | IN5257008 | Kendallville | 10,300 | <MRL | <MRL | 0 | No PFAS detected |
| Kent Water Company | IN5239004 | Hanover | 6,750 | <MRL | <MRL | 0 | No PFAS detected |
| Knox Water Works | IN5275002 | Knox | 3,700 | <MRL | <MRL | 0 | No PFAS detected |
| L-M-S Conservancy District | IN5215007 | Aurora | 5,375 | <MRL | <MRL | 0 | No PFAS detected |
| Lafayette Water Works | IN5279013 | Lafayette | 70,835 | <MRL | <MRL | 0 | No PFAS detected |
| Laporte Water Works | IN5246017 | Laporte | 22,197 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Laville Jr. & Sr. High School | IN2710815 | Lakeville | 675 | <MRL | <MRL | 0 | No PFAS detected |
| Lawrenceburg Municipal Utilities | IN5215006 | Lawrenceburg | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Lebanon Utilities | IN5206003 | Lebanon | 16,840 | <MRL | <MRL | 0 | No PFAS detected |
| Ligonier Water Works | IN5257010 | Ligonier | 4,405 | <MRL | <MRL | 0 | No PFAS detected |
| Linton Municipal Water Utility | IN5228005 | Linton | 7,430 | <MRL | <MRL | 0 | No PFAS detected |
| Lippert Components (Plant #30) | IN2201093 | Rochester | 200 | <MRL | <MRL | 0 | Other PFAS detected |
| Logansport Municipal Utility-Well Field | IN5209012 | Logansport | 18,369 | <MRL | <MRL | 0 | No PFAS detected |
| Loogootee Water Works | IN5251005 | Loogootee | 2,800 | <MRL | <MRL | 0 | No PFAS detected |
| Madison Water Department | IN5239006 | Madison | 15,323 | 4.6 | <MRL | 0.004 | PFOA 1–3 × its limit |
| Marion City Water Works | IN5227014 | Marion | 28,363 | <MRL | <MRL | 0 | No PFAS detected |
| Martinsville Water Utility | IN5255009 | Martinsville | 15,000 | <MRL | <MRL | 0 | No PFAS detected |
| Marysville Otisco Nabb Water Corp. | IN5210006 | Otisco | 6,813 | 14.5 | <MRL | 0 | PFOA ≥ 3 × its limit |
| Michigan City Department Of Water Works | IN5246020 | Michigan City | 33,996 | <MRL | <MRL | 0 | No PFAS detected |
| Middlebury Water Department | IN5220014 | Middlebury | 3,420 | <MRL | <MRL | 0 | No PFAS detected |
| Mishawaka Utilities | IN5271009 | Mishawaka | 49,675 | <MRL | 4.2 | 0.56 | PFOS 1–3 × its limit |
| Mitchell Water Department | IN5247003 | Mitchell | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Monticello Water Works | IN5291011 | Monticello | 5,300 | <MRL | <MRL | 0 | No PFAS detected |
| Morgan County Rural Water Company | IN5255010 | Martinsville | 8,800 | <MRL | <MRL | 0 | No PFAS detected |
| Mount Vernon Water Works | IN5265006 | Mount Vernon | 6,426 | 4 | <MRL | 0.53 | PFOA 1–3 × its limit |
| Munster Water Company | IN5245031 | Munster | 23,894 | <MRL | <MRL | 0 | No PFAS detected |
| Napoleon Community Rural Water Corp. | IN5269007 | Napoleon | 5,564 | <MRL | <MRL | 0.003 | Hazard Index below its limit |
| Nappanee Water Utility | IN5220016 | Nappanee | 6,800 | <MRL | <MRL | 0 | No PFAS detected |
| Nashville Water Department | IN5207002 | Nashville | 3,315 | <MRL | <MRL | 0 | No PFAS detected |
| Naval Weapons Station, Crane | IN5251003 | Crane | 6,538 | <MRL | <MRL | 0 | No PFAS detected |
| New Castle Utilities | IN5233011 | New Castle | 19,880 | <MRL | <MRL | 0 | No PFAS detected |
| New Chicago Water Works | IN5245032 | Hobart | 5,500 | <MRL | <MRL | 0 | No PFAS detected |
| New Haven Water Department | IN5202009 | New Haven | 15,700 | <MRL | <MRL | 0 | Other PFAS detected |
| New Pekin Water Utility | IN5288004 | Pekin | 2,150 | <MRL | <MRL | 0 | Other PFAS detected |
| North Dearborn Water Authority | IN5215008 | West Harrison | 5,775 | <MRL | <MRL | 0 | No PFAS detected |
| North Lawrence Water Authority | IN5247004 | Bedford | 11,625 | <MRL | <MRL | 0 | No PFAS detected |
| North Manchester Water Department | IN5285009 | North Manchester | 6,100 | <MRL | <MRL | 0 | No PFAS detected |
| North Vernon Water Department | IN5240008 | North Vernon | 6,500 | <MRL | <MRL | 0 | No PFAS detected |
| Northwest Jasper Regional Water District | IN5237015 | Demotte | 4,054 | <MRL | <MRL | 0 | No PFAS detected |
| Palmyra Water Works | IN5231004 | Palmyra | 4,425 | 6.5 | <MRL | 0 | PFOA 1–3 × its limit |
| Paoli Water Department | IN5259004 | Orleans | 3,677 | <MRL | <MRL | 0 | No PFAS detected |
| Patoka Lake Regional Water | IN5219012 | Dubois | 13,503 | <MRL | <MRL | 0 | No PFAS detected |
| Patriot Water Department | IN5278001 | Patriot | 11,937 | <MRL | <MRL | 0 | No PFAS detected |
| Pendleton Water Company | IN5248019 | Pendleton | 5,758 | <MRL | <MRL | 0 | No PFAS detected |
| Peru Water Department | IN5252016 | Peru | 11,417 | <MRL | <MRL | 0 | No PFAS detected |
| Petersburg Water Company | IN5263002 | Washington | 4,018 | <MRL | <MRL | 0 | No PFAS detected |
| Pike-Gibson Water, Inc. | IN5263003 | Oakland City | 10,000 | 7.9 | <MRL | 0.532 | PFOA 1–3 × its limit |
| Pittsboro Water Company | IN5232019 | Brownsburg | 4,113 | <MRL | <MRL | 0 | Other PFAS detected |
| Plainfield Re-Entry Educational Facility | IN5232007 | Plainfield | 4,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Plainfield Water Works | IN5232020 | Plainfield | 34,477 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Plymouth Water Department | IN5250010 | Plymouth | 10,241 | <MRL | <MRL | 0 | No PFAS detected |
| Portland Municipal Water Plant | IN5238007 | Portland | 6,209 | <MRL | <MRL | 0 | No PFAS detected |
| Posey Township Water Corp. | IN5288006 | Hardinsburg | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Prairie Vista Elementary School | IN2710841 | Mishawaka | 510 | <MRL | <MRL | 0 | No PFAS detected |
| Princes Lake Water Department | IN5241007 | Nineveh | 4,095 | <MRL | <MRL | 0 | No PFAS detected |
| Princeton Water Department | IN5226008 | Princeton | 10,875 | <MRL | <MRL | 0 | No PFAS detected |
| Purdue Univ. Water Works | IN5279015 | West Lafayette | 50,000 | <MRL | <MRL | 0.689 | Hazard Index below its limit |
| Ramsey Water Company, Inc. | IN5231005 | Ramsey | 16,475 | 5.2 | <MRL | 0 | PFOA 1–3 × its limit |
| Rensselaer Water Department | IN5237005 | Rensselaer | 6,200 | <MRL | <MRL | 0 | No PFAS detected |
| Reo Water Corporation | IN5274009 | Rockport | 3,875 | <MRL | <MRL | 0 | No PFAS detected |
| Roann Water Works | IN5285013 | Roann | 400 | <MRL | <MRL | 0 | No PFAS detected |
| Robert Fase Senior Center | IN2370881 | Rensselaer | 69 | <MRL | <MRL | 0 | No PFAS detected |
| Rochester Water Department | IN5225006 | Rochester | 6,218 | <MRL | <MRL | 0 | No PFAS detected |
| Rockville Light & Water | IN5261006 | Rockville | 4,195 | <MRL | <MRL | 0 | No PFAS detected |
| Royal Center Water Utility | IN5209008 | Royal Center | 861 | <MRL | <MRL | 0 | No PFAS detected |
| Rural Membership Water Corp. Of Clark Co | IN5210009 | Henryville | 8,630 | <MRL | <MRL | 0 | No PFAS detected |
| Rushville City Utility | IN5270005 | Rushville | 6,800 | <MRL | <MRL | 0 | No PFAS detected |
| Salem Water Works | IN5288005 | Salem | 8,200 | <MRL | <MRL | 0 | No PFAS detected |
| Santa Claus Water Utility | IN5274010 | Santa Claus | 3,683 | <MRL | <MRL | 0 | No PFAS detected |
| Schererville Water Department | IN5245041 | Schererville | 30,000 | <MRL | <MRL | 0 | No PFAS detected |
| Scottsburg Water Department | IN5272001 | Scottsburg | 7,369 | <MRL | <MRL | 0 | Other PFAS detected |
| Seelyville Water Works | IN5284011 | Seelyville | 6,393 | <MRL | <MRL | 0 | No PFAS detected |
| Sellersburg Water Department | IN5210010 | Sellersburg | 15,655 | 4 | <MRL | 0 | PFOA 1–3 × its limit |
| Shenandoah High School | IN2330018 | New Castle | 540 | <MRL | <MRL | 0 | No PFAS detected |
| Silver Creek Water Corporation | IN5210011 | Sellersburg | 20,028 | <MRL | <MRL | 0 | No PFAS detected |
| Sisters Of Holy Cross-St. Marys College | IN5271025 | Notre Dame | 2,111 | <MRL | <MRL | 0 | No PFAS detected |
| South Bend Water Works | IN5271014 | South Bend | 115,000 | 10 | <MRL | 2.564 | Hazard Index 1–3 × its limit |
| South Harrison Water Corporation | IN5231006 | Corydon | 9,057 | <MRL | <MRL | 0 | No PFAS detected |
| South Lawrence Utilities | IN5247007 | Mitchell | 6,395 | <MRL | <MRL | 0 | No PFAS detected |
| South Park Business Center | IN2410017 | Indianapolis | 5,167 | <MRL | <MRL | 0 | Other PFAS detected |
| Southern Monroe Water Authority | IN5253007 | Bloomington | 8,877 | <MRL | <MRL | 0 | No PFAS detected |
| Southwestern Bartholomew Water Corp. | IN5203008 | Columbus | 8,652 | <MRL | <MRL | 0.004 | Hazard Index below its limit |
| Speedway Water Works | IN5249008 | Speedway | 10,578 | <MRL | <MRL | 0 | Other PFAS detected |
| Springs Valley Regional Water District | IN5259002 | French Lick | 3,188 | <MRL | <MRL | 0 | No PFAS detected |
| St. John Municipal Water Utility | IN5245043 | St. John | 25,700 | <MRL | <MRL | 0 | No PFAS detected |
| Stucker Fork Water Utility | IN5272002 | Austin | 17,718 | <MRL | <MRL | 0 | No PFAS detected |
| Tell City Water Department | IN5262004 | Tell City | 9,315 | 4.3 | <MRL | 0 | PFOA 1–3 × its limit |
| Tennyson Water Utility | IN5287007 | Tennyson | 4,158 | <MRL | <MRL | 0 | No PFAS detected |
| Tipton Utility Service B | IN5280004 | Tipton | 5,200 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Elizabeth | IN5231007 | Elizabeth | 4,450 | <MRL | <MRL | 0 | No PFAS detected |
| Trail Tree/Midcontinent Inn Inc. | IN2370087 | Winamac | 632 | <MRL | <MRL | 0 | No PFAS detected |
| Tri-Township Water Corporation | IN5215009 | Lawrenceburg | 10,435 | <MRL | <MRL | 0 | No PFAS detected |
| Union City Water Works | IN5268010 | Union City | 3,513 | <MRL | <MRL | 0 | No PFAS detected |
| University Of Notre Dame | IN5271020 | Notre Dame | 7,400 | 4.1 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Upland Water Department | IN5227022 | Upland | 3,308 | <MRL | <MRL | 0 | No PFAS detected |
| Valley Rural Utility Company | IN5215004 | Lawrenceburg | 5,529 | <MRL | <MRL | 0 | No PFAS detected |
| Valparaiso Department Of Water Works | IN5264029 | Valparaiso | 36,000 | <MRL | <MRL | 0 | No PFAS detected |
| Van Buren Water, Inc. | IN5253008 | Bloomington | 6,670 | <MRL | <MRL | 0 | No PFAS detected |
| Vincennes Water Department | IN5242014 | Vincennes | 18,701 | <MRL | <MRL | 0 | No PFAS detected |
| Walkerton Light & Water | IN5271017 | Walkerton | 2,262 | <MRL | <MRL | 0 | No PFAS detected |
| Warren Municipal Water Works | IN5235012 | Warren | 1,237 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Township Water | IN5210015 | New Washington | 4,315 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Twp Water Authority | IN5253009 | Bloomington | 3,825 | <MRL | <MRL | 0 | No PFAS detected |
| Washington Water Works | IN5214007 | Washington | 13,690 | <MRL | <MRL | 0 | No PFAS detected |
| Watson Rural Water Company | IN5210016 | Jeffersonville | 15,750 | <MRL | <MRL | 0 | No PFAS detected |
| West Terre Haute Water | IN5284015 | West Terre Haute | 4,075 | <MRL | 7.1 | 0.352 | PFOS 1–3 × its limit |
| Whiteland Water Works | IN5241009 | Whiteland | 5,955 | <MRL | <MRL | 0 | Other PFAS detected |
| Whiting Water Department | IN5245048 | Whiting | 4,900 | <MRL | <MRL | 0 | No PFAS detected |
| Yorktown Water Department | IN5218014 | Yorktown | 6,200 | <MRL | <MRL | 0 | No PFAS detected |
Not tested under UCMR 5 (1,137)
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 |
|---|---|---|---|---|---|
| 48Forty Solutions Llc | IN2490060 | NTNCWS | Indianapolis | 75 | Marion County |
| A & A Sheet Metal Products | IN2460011 | NTNCWS | Laporte | 90 | LaPorte County |
| A.B. Brown Station - Centerpoint | IN2650812 | NTNCWS | Evansville | 129 | Posey County |
| Advance Water Works | IN5206001 | CWS | Advance | 500 | Boone County |
| Agdia, Inc. | IN2200212 | NTNCWS | Elkhart | 60 | Elkhart County |
| Akron Water Department | IN5225001 | CWS | Akron | 1,206 | Fulton County |
| Albany Water Department | IN5218001 | CWS | Albany | 2,165 | Delaware County |
| Albion Water & Sewer | IN5257001 | CWS | Albion | 2,349 | Noble County |
| Alcoa Warrick Operations | IN2870801 | NTNCWS | Newburgh | 650 | Warrick County |
| Alexandria Moulding | IN2460055 | NTNCWS | Rolling Prairie | 100 | LaPorte County |
| Alfordsville Water Utility | IN5214001 | CWS | Montgomery | 510 | Daviess County |
| Alloy Custom Products, Llc | IN2790022 | NTNCWS | Lafayette | 110 | Tippecanoe County |
| Alpha Building Center | IN2440001 | NTNCWS | Shipshewana | 53 | LaGrange County |
| Ambia Water Department | IN5204001 | CWS | Ambia | 250 | Benton County |
| American Cargo Group Trailers, Llc | IN2201115 | NTNCWS | Bristol | 79 | Elkhart County |
| American Electric Power - Rockport Plant | IN2740809 | NTNCWS | Rockport | 740 | Spencer County |
| American Millwork, Llc | IN2200139 | NTNCWS | Elkhart | 112 | Elkhart County |
| American Mobile Home Park | IN5218016 | CWS | Indianapolis | 65 | Delaware County |
| American Petroleum Inc Dba Gallops | IN2200195 | NTNCWS | Middlebury | 1,145 | Elkhart County |
| Amish Country Popcorn | IN2010066 | NTNCWS | Berne | 45 | Adams County |
| Ancilla Domini (Convent) | IN5250016 | CWS | Donaldson | 680 | Marshall County |
| And-Tro Water Authority - District 1 | IN5262001 | CWS | Tell City | 2,833 | Perry County |
| And-Tro Water Authority - District 2 | IN5262003 | CWS | Tell City | 1,798 | Perry County |
| Anderson Township Regional Sewer Dist. | IN5270003 | CWS | Milroy | 900 | Rush County |
| Andrews Water Department | IN5235001 | CWS | Andrews | 1,149 | Huntington County |
| Anoka Acres Mobile Home Park | IN5209001 | CWS | Wanatah | 127 | Cass County |
| Apple Valley East | IN2450082 | NTNCWS | Indianapolis | 117 | Lake County |
| Aqua Indiana - Wedgewood Park Water Util | IN5271018 | CWS | Indianapolis | 645 | St. Joseph County |
| Aqua Indiana Water Company | IN5245017 | CWS | Indianapolis | 1,350 | Lake County |
| Arboc Specialty Vehicles | IN2200991 | NTNCWS | Middlebury | 125 | Elkhart County |
| Arc Opportunities | IN2441018 | NTNCWS | Howe | 88 | LaGrange County |
| Arcadia Water Department | IN5229001 | CWS | Arcadia | 1,515 | Hamilton County |
| Arch Medical Solutions | IN2430318 | NTNCWS | Warsaw | 41 | Kosciusko County |
| Arcola School | IN2020024 | NTNCWS | Fort Wayne | 270 | Allen County |
| Argos Municipal Water Plant | IN5250001 | CWS | Argos | 1,680 | Marshall County |
| Arlington Elementary School | IN2700013 | NTNCWS | Rushville | 274 | Rush County |
| Arrowhead Mobile Home Park | IN5230001 | CWS | New Castle | 65 | Hancock County |
| Ashbury Ridge | IN5255023 | CWS | Martinsville | 340 | Morgan County |
| Ashley Water Department | IN5276002 | CWS | Ashley | 983 | DeKalb County, Steuben County |
| Astral Industries, Inc. - Stamping Plant | IN2680869 | NTNCWS | Lynn | 163 | Randolph County |
| Atlanta Water Department | IN5229002 | CWS | Atlanta | 735 | Hamilton County |
| Atlas Excavating Inc | IN2790063 | NTNCWS | West Lafayette | 50 | Tippecanoe County |
| Attica Water Utility | IN5223001 | CWS | Attica | 3,147 | Fountain County |
| Auburn Gear, Inc. | IN2170847 | NTNCWS | Fort Wayne | 140 | DeKalb County |
| Auto Owners Insurance | IN2270004 | NTNCWS | Marion | 100 | Grant County |
| Automated Egg Producers | IN2850017 | NTNCWS | Kent | 25 | Wabash County |
| Autumn Acres Subdivision | IN5218028 | CWS | Yorktown | 48 | Delaware County, Madison County |
| Autumn Grove | IN5244013 | CWS | Leesburg | 67 | LaGrange County |
| Avilla Water Department | IN5257002 | CWS | Avilla | 2,700 | Noble County |
| Ayr Custom Cabinetry Inc. | IN2500004 | NTNCWS | Nappanee | 60 | Marshall County |
| B And J Specialties | IN2570915 | NTNCWS | Wawaka | 49 | Noble County |
| B&J Medical Llc | IN2570088 | NTNCWS | Kendallville | 153 | Noble County |
| Baileys Discount Center | IN2750014 | NTNCWS | North Judson | 340 | Starke County |
| Bainbridge Water Works | IN5267001 | CWS | Bainbridge | 830 | Putnam County |
| Barletta Boats | IN2201056 | NTNCWS | Bristol | 180 | Elkhart County |
| Battle Ground Water District | IN5279002 | CWS | Battle Ground | 1,940 | Tippecanoe County |
| Bauer Head Start | IN2120809 | NTNCWS | Zionsville | 65 | Clinton County |
| Baugo Community School - Early Learning | IN2200264 | NTNCWS | Elkhart | 25 | Elkhart County |
| Becks Superior Hybrids | IN2290044 | NTNCWS | Atlanta | 408 | Hamilton County |
| Beef House Restaurant | IN2830065 | NTNCWS | Covington | 850 | Vermillion County |
| Ben Mar Chateau | IN5217002 | CWS | Garrett | 166 | DeKalb County |
| Benton Central Jr./Sr. High School | IN2040802 | NTNCWS | Fowler | 1,376 | Benton County |
| Benton Elementary School | IN2201008 | NTNCWS | Goshen | 530 | Elkhart County |
| Bethel Lutheran Church | IN2290005 | NTNCWS | Noblesville | 860 | Hamilton County |
| Bethlehem Lutheran School | IN2900013 | NTNCWS | Ossian | 556 | Wells County |
| Better Way Partners, Llc (Plant # 3) | IN2201071 | NTNCWS | New Paris | 50 | Elkhart County |
| Better Way Partners, Llc (Plant #6) | IN2200275 | NTNCWS | New Paris | 103 | Elkhart County |
| Better Way Partners, Llc (Plant# 5) | IN2201000 | NTNCWS | New Paris | 103 | Elkhart County |
| Better Way Products (Plant #1) | IN2201070 | NTNCWS | New Paris | 135 | Elkhart County |
| Bf Goodrich Tire Manufacturing | IN2020913 | NTNCWS | Woodburn | 1,750 | Allen County |
| Big C Lumber | IN2710139 | NTNCWS | Granger | 74 | St. Joseph County |
| Big Oaks Campground | IN5218002 | CWS | Noblesville | 37 | Delaware County |
| Big Walnut Water Company | IN5267002 | CWS | Greencastle | 500 | Putnam County |
| Biotown Ag | IN2910028 | NTNCWS | Reynolds | 80 | White County |
| Birdseye Water System | IN5219001 | CWS | Birdseye | 972 | Dubois County |
| Blackford County Security Center | IN2050842 | NTNCWS | Hartford City | 84 | Blackford County |
| Bloomfield Elementary School | IN2380007 | NTNCWS | Bryant | 300 | Jay County |
| Bloomingdale Water Works | IN5261001 | CWS | Bloomingdale | 562 | Parke County |
| Blue Beacon Truck Wash | IN2410029 | NTNCWS | Saline | 196 | Johnson County |
| Blue Ridge Mobile Home Park | IN5292002 | CWS | Auburn | 300 | Whitley County |
| Blue River Estates Mobile Home Park | IN5273001 | CWS | Lima | 99 | Shelby County |
| Blue River Regional Water District | IN5213006 | CWS | Milltown | 2,000 | Crawford County, Harrison County |
| Blue River Valley Jr./Sr. High | IN2330015 | NTNCWS | New Castle | 733 | Henry County |
| Boone Grove High School | IN2640936 | NTNCWS | Valparaiso | 600 | Porter County |
| Boone Grove Middle School | IN2640910 | NTNCWS | Valparaiso | 700 | Porter County |
| Borkholder Building | IN2500047 | NTNCWS | Nappanee | 60 | Marshall County |
| Boswell Water Department | IN5204002 | CWS | Boswell | 750 | Benton County |
| Bourbon Water Department | IN5250002 | CWS | Bourbon | 1,767 | Marshall County |
| Brandywine Elementary | IN2300005 | NTNCWS | New Castle | 450 | Hancock County |
| Braunability - Leiters Ford | IN2250030 | NTNCWS | Winamac | 35 | Fulton County |
| Bremerton Mobile Home Park | IN5245004 | CWS | St. Charles | 79 | Lake County |
| Brenneman Memorial Church | IN2200505 | NTNCWS | Goshen | 580 | Elkhart County |
| Brickcraft Llc | IN2110002 | NTNCWS | Center Point | 44 | Clay County |
| Bright Horizions | IN2440801 | NTNCWS | Angola | 25 | LaGrange County |
| Bristol Mobile Village | IN5220001 | CWS | Bristol | 238 | Elkhart County |
| Bristol Water Department | IN5220003 | CWS | Bristol | 1,805 | Elkhart County |
| Brook Water Utility | IN5256002 | CWS | Brook | 986 | Newton County |
| Brooklyn Water Works | IN5255002 | CWS | Brooklyn | 1,600 | Morgan County |
| Brookston Water Department | IN5291002 | CWS | Brookston | 1,815 | White County |
| Brookville Water Works | IN5224001 | CWS | Brookville | 2,800 | Franklin County |
| Brown County State Park | IN2070020 | NTNCWS | Nashville | 2,836 | Brown County |
| Bruceville Water Utility | IN5242003 | CWS | Bruceville | 449 | Knox County |
| Buhrt Engineering, Inc. | IN2430145 | NTNCWS | Warsaw | 36 | Kosciusko County |
| Bull Moose Tube Company | IN2201065 | NTNCWS | Elkhart | 115 | Elkhart County |
| Bunker Hill Water Works | IN5252003 | CWS | Bunker Hill | 900 | Miami County |
| Burnt Pines Water Association | IN5240001 | CWS | North Vernon | 900 | Jennings County |
| Butler Water Department | IN5217003 | CWS | Waterloo | 2,700 | DeKalb County |
| C K Finishing Llc | IN2431116 | NTNCWS | Warsaw | 25 | Kosciusko County |
| Cade Apartments | IN5230010 | CWS | New Castle | 50 | Hancock County |
| Cal-Maine Foods Inc. | IN2430921 | NTNCWS | Atwood | 110 | Kosciusko County |
| Cambridge City Municipal Water Works | IN5289002 | CWS | Cambridge City | 1,900 | Wayne County |
| Camden Water Utility | IN5208001 | CWS | Camden | 611 | Carroll County |
| Campbellsburg Water Works | IN5288001 | CWS | Campbellsburg | 900 | Washington County |
| Cannelton Utilities | IN5262002 | CWS | Cannelton | 1,658 | Perry County |
| Caps Mobile Home Park | IN5276008 | CWS | Leo | 182 | Steuben County |
| Capstone Methodist Church | IN2430278 | NTNCWS | Warsaw | 160 | Kosciusko County |
| Carbon Water Corporation | IN5211002 | CWS | Carbon | 1,088 | Clay County |
| Caring Hands Care Center | IN2440131 | NTNCWS | Topeka | 50 | LaGrange County |
| Carlisle Water Department | IN5277001 | CWS | Carlisle | 1,152 | Sullivan County |
| Carmel Clay Water | IN5229024 | CWS | Carmel | 393 | Hamilton County |
| Carpenters House Church Childcare | IN2340029 | NTNCWS | Kokomo | 106 | Howard County |
| Carriage House Estates | IN5285019 | CWS | Fort Wayne | 50 | Wabash County |
| Carriage Light Mhp - Lots 39-58 | IN5276003 | CWS | Farmington Hills | 56 | Steuben County |
| Carroll Elementary School | IN2080805 | NTNCWS | Flora | 658 | Carroll County |
| Carroll Jr./Sr. High School | IN2080002 | NTNCWS | Flora | 579 | Carroll County |
| Carthage Water Department | IN5270001 | CWS | New Castle | 1,000 | Rush County |
| Cascade Senior High School | IN2320021 | NTNCWS | Clayton | 975 | Hendricks County |
| Caston Schools | IN2250003 | NTNCWS | Rochester | 900 | Fulton County |
| Cataract Lake Water Corporation | IN5260002 | CWS | Cloverdale | 3,215 | Owen County |
| Cayuga Water Department | IN5283002 | CWS | Cayuga | 1,162 | Vermillion County |
| Cedar Creek Mobile Home Park | IN5252022 | CWS | Durham | 150 | Miami County |
| Cedar Gardens Mhp | IN5245050 | CWS | Cedar Lake | 34 | Lake County |
| Cedar Lake - Robins Nest | IN5245067 | CWS | Cedar Lake | 950 | Lake County |
| Cedar Lake Bible Conference Grounds | IN5245055 | CWS | Cedar Lake | 150 | Lake County |
| Cedar Lake Early Learning Academy, Llc | IN2450089 | NTNCWS | Cedar Lake | 75 | Lake County |
| Cedar Lake Mobile Home Park | IN5245005 | CWS | Cedar Lake | 200 | Lake County |
| Center Point Water Works | IN5211003 | CWS | Centerpoint | 625 | Clay County |
| Centerton Elementary School | IN2550004 | NTNCWS | Martinsville | 150 | Morgan County |
| Centerville Water Works | IN5289003 | CWS | Milton | 2,533 | Wayne County |
| Central Indiana Ethanol, Llc. | IN2270010 | NTNCWS | Marion | 159 | Grant County |
| Chain O Lakes Correctional Facility | IN5257023 | CWS | Indianapolis | 186 | Noble County |
| Chalmers Water Works | IN5291003 | CWS | Chalmers | 550 | White County |
| Chapel Hill Christian Church | IN2340279 | NTNCWS | Kokomo | 695 | Howard County |
| Chesterfield Water Department | IN5248004 | CWS | Chesterfield | 2,800 | Delaware County, Madison County |
| Chrisney Water Department | IN5274001 | CWS | Chrisney | 823 | Spencer County |
| Christ Life Angola | IN2760027 | NTNCWS | Angola | 79 | Steuben County |
| Christs Corner Ch Early Learning Ministr | IN2180051 | NTNCWS | Gaston | 58 | Delaware County |
| Churubusco Water Department | IN5292003 | CWS | Churubusco | 1,803 | Whitley County |
| Cimc Reefer Trailer | IN2910032 | NTNCWS | Monon | 125 | White County |
| Citizens Water Of Westfield Llc | IN5248026 | CWS | Indianapolis | 65 | Hamilton County, Madison County |
| City Of Georgetown (Illinois) | IN5283013 | CWS | Georgetown | 50 | Vermillion County |
| Cives Steel Company - Midwest Division | IN2910968 | NTNCWS | Wolcott | 140 | White County |
| Clark Elementary School | IN2410007 | NTNCWS | Whiteland | 471 | Johnson County |
| Clarks Hill Water Works | IN5279006 | CWS | Clarks Hill | 660 | Tippecanoe County |
| Classic Stone Llc | IN2290895 | NTNCWS | Westfield | 48 | Hamilton County |
| Clay City Water Works | IN5211004 | CWS | Clay City | 1,152 | Clay County |
| Clean Fuels National | IN2900027 | NTNCWS | Keystone | 100 | Wells County |
| Clearwater Village Mobile Home Park | IN5271012 | CWS | Southfield | 400 | St. Joseph County |
| Clinton Central Elementary School | IN2120004 | NTNCWS | Michigantown | 643 | Clinton County |
| Clinton Central Jr./Sr. High School | IN2120005 | NTNCWS | Michigantown | 446 | Clinton County |
| Clinton Christian School | IN2200025 | NTNCWS | Goshen | 229 | Elkhart County |
| Clinton Prairie School Corporation | IN2120007 | NTNCWS | Frankfort | 1,150 | Clinton County |
| Clinton Township Water Company | IN5283003 | CWS | Clinton | 2,300 | Vermillion County |
| Cloverdale Water Works | IN5267003 | CWS | Cloverdale | 2,225 | Putnam County |
| Coachlight Mhp Llc | IN5276012 | CWS | Farmington Hills | 96 | Steuben County |
| Cobus Green Mobile Home Park | IN5220037 | CWS | Southfield | 1,042 | Elkhart County |
| Cole Elementary School | IN2790906 | NTNCWS | Lafayette | 363 | Tippecanoe County |
| Colfax Water Company | IN5212001 | CWS | Colfax | 690 | Clinton County |
| Colonial Crest Llc | IN5227008 | CWS | Chesterton | 101 | Grant County |
| Colonial Mobile Court | IN5246005 | CWS | Rolling Prairie | 99 | LaPorte County |
| Color Master Inc | IN2570806 | NTNCWS | Butler | 27 | Noble County |
| Composite Designs, Inc. | IN2430072 | NTNCWS | Leesburg | 37 | Kosciusko County |
| Continental Industries, Inc. | IN2201063 | NTNCWS | Elkhart | 85 | Elkhart County |
| Converse Water Works | IN5252006 | CWS | Van Buren | 1,265 | Miami County |
| Coolspring Elementary School | IN2460035 | NTNCWS | Rolling Prairie | 460 | LaPorte County |
| Cornerstone Mennonite Church/School | IN2200217 | NTNCWS | Nappanee | 210 | Elkhart County |
| Corunna Water Utility | IN5217008 | CWS | Corunna | 255 | DeKalb County |
| Country Acres Mobile Home Park | IN5218003 | CWS | Cincinnati | 150 | Delaware County |
| Country Club Crossing | IN5243040 | CWS | Noblesville | 44 | Kosciusko County |
| Country Court Estates | IN5202003 | CWS | St. Petersburg | 362 | Allen County |
| Country Estates Mobile Home Park | IN5212002 | CWS | Frankfort | 90 | Clinton County |
| Country Meadows Mobile Home Park | IN5220031 | CWS | Clinton Township | 55 | Elkhart County, Kosciusko County |
| Country Retreat Mhc, Llc | IN5289001 | CWS | Centerville | 35 | Wayne County |
| Country Squire Mobile Home Park, Inc. | IN5218004 | CWS | Daleville | 25 | Delaware County |
| Country View Estates | IN5254019 | CWS | Crawfordsville | 30 | Montgomery County |
| Countryside Villas | IN5234013 | CWS | Fort Wayne | 48 | Howard County |
| Countryview Farms | IN5218011 | CWS | Farmington Hills | 290 | Delaware County |
| County Materials | IN2300038 | NTNCWS | Greenfield | 62 | Hancock County |
| Covington Water Department | IN5223002 | CWS | Covington | 2,645 | Fountain County |
| Cowan Elementary | IN2180850 | NTNCWS | Muncie | 464 | Delaware County |
| Cowan High School | IN2180851 | NTNCWS | Muncie | 392 | Delaware County |
| Coxs Plant Farm Inc. | IN2320072 | NTNCWS | Clayton | 30 | Hendricks County |
| Craig Welding & Manufacturing, Inc. | IN2250015 | NTNCWS | Mentone | 40 | Fulton County |
| Crane Water Works | IN5251002 | CWS | Loogootee | 293 | Martin County |
| Crawford County Water Company, Inc. | IN5213001 | CWS | Marengo | 2,678 | Crawford County |
| Creekside Manor Mhp | IN5250007 | CWS | Lapaz | 73 | Marshall County |
| Creekside Mobile Home Park | IN5273004 | CWS | Indianapolis | 75 | Shelby County |
| Cromwell Water Works | IN5257004 | CWS | Cromwell | 550 | Noble County |
| Crossings Mobile Home Park | IN5245014 | CWS | Lapeer | 100 | Lake County |
| Crossroads Community Church/Daycare | IN2200085 | NTNCWS | Goshen | 298 | Elkhart County |
| Crothersville Utilities | IN5236001 | CWS | Crothersville | 1,875 | Jackson County |
| Cuii - Water Service Co. | IN5237002 | CWS | Crown Point | 654 | Jasper County, Newton County |
| Culver Duck Farms, Inc. | IN2201046 | NTNCWS | Middlebury | 241 | Elkhart County |
| Culver Educational Foundation | IN5250004 | CWS | Culver | 1,940 | Marshall County |
| Culver Water Department | IN5250005 | CWS | Culver | 1,391 | Marshall County |
| Culvers Hill - North Webster | IN5243005 | CWS | Nappanee | 75 | Kosciusko County |
| Custom Curve Cabinetry Llc Plant 1 | IN2200270 | NTNCWS | Bristol | 45 | Elkhart County |
| Cutting Edge Machine And Tool | IN2200087 | NTNCWS | New Paris | 107 | Elkhart County |
| Cynthiana Water Works | IN5265004 | CWS | Cynthiana | 699 | Posey County |
| Da-Lite Division/Legrand Av | IN2431037 | NTNCWS | Warsaw | 350 | Kosciusko County |
| Dale Water Works | IN5274002 | CWS | Dale | 1,637 | Spencer County |
| Daleville (Town Of) | IN5218027 | CWS | Daleville | 1,560 | Delaware County |
| Dana Water Works | IN5283005 | CWS | Dana | 660 | Vermillion County |
| Danisco Usa Inc. | IN2840888 | NTNCWS | Terre Haute | 80 | Vigo County |
| Darlington Water | IN5254003 | CWS | Indianapolis | 860 | Montgomery County |
| Davis Mobile Home Park | IN5203003 | CWS | Jonesville | 35 | Bartholomew County |
| Dayton Water Utility | IN5279021 | CWS | Dayton | 1,420 | Tippecanoe County |
| Dayton-Phoenix Group | IN2790037 | NTNCWS | West Lafayette | 65 | Tippecanoe County |
| Decatur Co. Water Corp. | IN5216008 | CWS | Greensburg | 3,440 | Decatur County |
| Decker Water Works | IN5242004 | CWS | Decker | 273 | Knox County |
| Deer Creek Estates Home Water Assoc. | IN5252007 | CWS | Galveston | 265 | Miami County |
| Deerfield Elementary School | IN2680801 | NTNCWS | Ridgeville | 238 | Randolph County |
| Delaware Acres Mhc | IN5218005 | CWS | Muncie | 126 | Delaware County |
| Delivery Concepts, Inc - Plant 1 | IN2200252 | NTNCWS | Elkhart | 47 | Elkhart County |
| Delivery Concepts, Inc - Plant 2 | IN2200925 | NTNCWS | Elkhart | 27 | Elkhart County |
| Delphi Water Works | IN5208002 | CWS | Delphi | 3,200 | Carroll County |
| Digger Specialties Corporate Office | IN2500055 | NTNCWS | Bremen | 40 | Marshall County |
| Dillsboro Water Works | IN5215002 | CWS | Dillsboro | 2,000 | Dearborn County |
| Discovery Charter School | IN2640036 | NTNCWS | Porter | 454 | Porter County |
| Discovery Middle School | IN2710895 | NTNCWS | Mishawaka | 848 | St. Joseph County |
| District 39 Apartments | IN5232012 | CWS | Plainfield | 36 | Hendricks County |
| Dixon Woods Apartments | IN5234011 | CWS | Oakford | 25 | Howard County |
| Dragon Products | IN2250013 | NTNCWS | Akron | 35 | Fulton County |
| Dublin Municipal Water Works | IN5289005 | CWS | Milton | 790 | Wayne County |
| Dubose Strapping Inc. | IN2540031 | NTNCWS | Crawfordsville | 48 | Montgomery County |
| Duff Water Corporation | IN5219003 | CWS | Huntingburg | 825 | Dubois County |
| Dugger Utilities | IN5277002 | CWS | Dugger | 1,935 | Sullivan County |
| Duke Energy - Gibson Generating Station | IN2260803 | NTNCWS | Owensville | 350 | Gibson County |
| Duke Energy, Noblesville Generating Stn. | IN2290808 | NTNCWS | Noblesville | 28 | Hamilton County |
| Duneland Beach Association | IN5246008 | CWS | Michigan City | 300 | LaPorte County |
| Dunkirk Water Department | IN5238001 | CWS | Dunkirk | 2,305 | Jay County |
| Durbin School | IN2290862 | NTNCWS | Fishers | 415 | Hamilton County |
| Eagles Nest Estates | IN5257006 | CWS | Ligonier | 350 | Noble County |
| Eagletown Estates Mobile Home Park | IN5229023 | CWS | Westfield | 97 | Hamilton County |
| Earl Park Municipal Water Utility | IN5204003 | CWS | Earl Park | 300 | Benton County |
| East Elementary | IN2480021 | NTNCWS | Pendleton | 800 | Madison County |
| Eastbrook High School | IN2270015 | NTNCWS | Marion | 900 | Grant County |
| Eastern Hancock Elem/Jr High | IN2300911 | NTNCWS | New Castle | 850 | Hancock County |
| Eastern Hancock High School | IN2300014 | NTNCWS | New Castle | 440 | Hancock County |
| Eaton Water Works | IN5218006 | CWS | Eaton | 1,595 | Delaware County |
| Eden Elementary | IN2300011 | NTNCWS | Greenfield | 254 | Hancock County |
| Edgewood Water Department | IN5248006 | CWS | Anderson | 2,053 | Madison County |
| Edwardsport Water Utility | IN5242005 | CWS | Freelandville | 488 | Knox County |
| Egg Innovations | IN2430154 | NTNCWS | Warsaw | 61 | Kosciusko County |
| Elanco Clinton Labs | IN2830820 | NTNCWS | Clinton | 570 | Vermillion County |
| Elberfeld Water Department | IN5287003 | CWS | Elberfeld | 2,122 | Warrick County |
| Elkhart Mobile Home Park | IN5220007 | CWS | Osceola | 96 | Elkhart County |
| Elkhart Plastics, Inc. | IN2200914 | NTNCWS | Middlebury | 220 | Elkhart County |
| Ellis Water Company, Inc. | IN5228001 | CWS | Linton | 3,772 | Greene County |
| Elm Road School | IN2710029 | NTNCWS | Mishawaka | 488 | St. Joseph County |
| Elnora Water Works | IN5214003 | CWS | Elnora | 620 | Daviess County |
| Emerald Ii | IN5273005 | CWS | Indianapolis | 98 | Shelby County |
| Emmanuel Lutheran Church/Elem. & Daycare | IN2020829 | NTNCWS | Fort Wayne | 183 | Allen County |
| Emmanuel United Methodist Church | IN2290020 | NTNCWS | Noblesville | 450 | Hamilton County |
| Engaging Minds Autism Services | IN2520040 | NTNCWS | Kokomo | 45 | Miami County |
| English Water Works | IN5213002 | CWS | English | 886 | Crawford County |
| Entech, Inc | IN2201043 | NTNCWS | Middlebury | 85 | Elkhart County |
| Etna Green Water Department | IN5243003 | CWS | Etna Green | 663 | Kosciusko County |
| Everton Water Corporation | IN5221002 | CWS | Connersville | 1,800 | Fayette County |
| Evonik Corporation | IN2790923 | NTNCWS | Lafayette | 1,034 | Tippecanoe County |
| Explorer Americas Van (Building A) | IN2430018 | NTNCWS | Warsaw | 105 | Kosciusko County |
| F.B. Culley Station - Centerpoint Energy | IN2870800 | NTNCWS | Evansville | 125 | Warrick County |
| Fairfield Christian Church | IN2340017 | NTNCWS | Oakford | 305 | Howard County |
| Fairfield Jr./Sr. High School | IN2200023 | NTNCWS | Goshen | 1,160 | Elkhart County |
| Fairmount Mhp, L.P. | IN5227003 | CWS | King Of Prussia | 80 | Grant County |
| Fairmount Water Works | IN5227005 | CWS | Fairmount | 2,756 | Grant County |
| Fairview Umc/Praises & Pathways Daycare | IN2380019 | NTNCWS | Portland | 50 | Jay County |
| Fairway Regional Water District | IN5245009 | CWS | Lowell | 210 | Lake County |
| Faith Umc/Kingdom Kids Daycare | IN2201045 | NTNCWS | Goshen | 788 | Elkhart County |
| Family Broadcasting Corporation | IN2710073 | NTNCWS | South Bend | 95 | St. Joseph County |
| Family Express - Distribution Center | IN2640144 | NTNCWS | Valparaiso | 102 | Porter County |
| Farmland Municipal Water Works | IN5268002 | CWS | Farmland | 1,301 | Randolph County |
| Fawn River Crossing | IN5244001 | CWS | Lagrange | 653 | LaGrange County |
| Fayette Central Elementary | IN2210006 | NTNCWS | Connersville | 306 | Fayette County |
| Fci & Fpc - Terre Haute | IN5284018 | CWS | Terre Haute | 1,390 | Vigo County |
| Fedex Freight | IN2760033 | NTNCWS | Harrison | 208 | Steuben County |
| Fellowship Baptist Church | IN2380010 | NTNCWS | Portland | 294 | Jay County |
| Ferdinand Water Department | IN5219004 | CWS | Ferdinand | 2,918 | Dubois County |
| First Call Towing & Recovery, Inc. | IN2760038 | NTNCWS | Fremont | 40 | Steuben County |
| Flex-N-Gate Covington | IN2860009 | NTNCWS | Covington | 361 | Warren County |
| Flora Water Works | IN5208003 | CWS | Flora | 2,100 | Carroll County |
| Flying J #653 | IN2450803 | NTNCWS | Knoxville | 1,450 | Lake County |
| Flying J #656 | IN2410966 | NTNCWS | Knoxville | 1,585 | Johnson County |
| Forchetti Family Ymca | IN2640926 | NTNCWS | Chesterton | 105 | Porter County |
| Forest Oaks Mhc, Llc | IN5264003 | CWS | Crown Point | 500 | Porter County |
| Forest River - Rance Aluminum, Div. 46 | IN2201064 | NTNCWS | Mishawaka | 40 | Elkhart County |
| Forest River Inc. - Plant 6 | IN2200053 | NTNCWS | Mishawaka | 120 | Elkhart County |
| Forest River Odyssey Division | IN2200061 | NTNCWS | Mishawaka | 200 | Elkhart County |
| Forest River Service Center | IN2200118 | NTNCWS | Mishawaka | 70 | Elkhart County |
| Fountain City Water Works | IN5289006 | CWS | Milton | 735 | Wayne County |
| Four Woods Laminating, Inc. | IN2440023 | NTNCWS | Topeka | 105 | LaGrange County |
| Fowler Water Works | IN5204006 | CWS | Fowler | 2,342 | Benton County |
| Frampton Wright Ydc Bldg - Well #7 | IN2640919 | NTNCWS | Valparaiso | 40 | Porter County |
| Francesville Water Department | IN5266001 | CWS | Francesville | 969 | Pulaski County |
| Francisco Water Department | IN5226002 | CWS | Francisco | 900 | Gibson County |
| Franklin Electric Water Treatment | IN2020071 | NTNCWS | Fort Wayne | 35 | Allen County |
| Frankton Water Works | IN5248008 | CWS | Frankton | 1,800 | Madison County |
| Freelandville Water Association | IN5242006 | CWS | Freelandville | 1,175 | Knox County |
| Fremont Water Department | IN5276006 | CWS | Fremont | 2,138 | Steuben County |
| Functional Devices Inc. | IN2800022 | NTNCWS | Sharpsville | 195 | Tipton County |
| Garden City Mobile Home Park | IN5203005 | CWS | Louisville | 140 | Bartholomew County |
| Gaston Water Works | IN5218008 | CWS | Gaston | 838 | Delaware County |
| Gatewood Estates | IN5250012 | CWS | Plymouth | 202 | Marshall County |
| General Rv Center | IN2200240 | NTNCWS | Bristol | 25 | Elkhart County |
| Geneva Water Department | IN5201003 | CWS | Geneva | 1,359 | Adams County |
| Gentryville Water Utility | IN5274004 | CWS | Gentryville | 1,625 | Spencer County |
| George Ade Memorial Health Care Center | IN5256014 | CWS | Brook | 140 | Newton County |
| Georgia-Pacific Gypsum Llc | IN2370870 | NTNCWS | Wheatfield | 138 | Jasper County |
| Girtz Industries, Inc. | IN2910969 | NTNCWS | Burnettsville | 150 | White County |
| Glen Eden Association | IN5276041 | CWS | Angola | 35 | Steuben County |
| Glenn Hills Non-Profit Corp. | IN5218020 | CWS | Selma | 69 | Delaware County |
| Glenwood Water Works | IN5270002 | CWS | Glenwood | 313 | Rush County |
| Global Composites, Inc. - Plant #4 | IN2201048 | NTNCWS | Elkhart | 150 | Elkhart County |
| Goddard School | IN2710178 | NTNCWS | Granger | 175 | St. Joseph County |
| Golden Acres Mobile Home Park | IN5276036 | CWS | Waterloo | 112 | Steuben County |
| Golden Pebbles Estates | IN5233002 | CWS | New Castle | 107 | Henry County |
| Good Shepherd Umc/Little Lamb Chldrn Min | IN2490001 | NTNCWS | Indianapolis | 75 | Marion County |
| Goodland Water Works | IN5256003 | CWS | Goodland | 990 | Newton County |
| Gosport Water Utility | IN5260003 | CWS | Spencer | 849 | Owen County |
| Grabill Water Works | IN5202006 | CWS | Grabill | 1,163 | Allen County |
| Grand Design Rv - Building 1 | IN2200102 | NTNCWS | Middlebury | 200 | Elkhart County |
| Grand Design Rv - Building 2 | IN2200103 | NTNCWS | Middlebury | 175 | Elkhart County |
| Grand Design Rv - Building 8 | IN2200305 | NTNCWS | Middlebury | 390 | Elkhart County |
| Grand Design Rv - Buildings 3, 6, & 7 | IN2200304 | NTNCWS | Middlebury | 525 | Elkhart County |
| Grand Design Rv - Corporate Office | IN2200101 | NTNCWS | Middlebury | 100 | Elkhart County |
| Grandview Municipal Water Utility | IN5274005 | CWS | Grandview | 765 | Spencer County |
| Granger St. (Martins Supermrk & Oscos) | IN2710900 | NTNCWS | South Bend | 880 | St. Joseph County |
| Grantsburg Rural Water Company | IN5213003 | CWS | Grantsburg | 250 | Crawford County |
| Grate Properties Mhc | IN5257022 | CWS | Waterloo | 66 | Noble County |
| Grayfox Public Water Supply | IN5202030 | CWS | Roanoke | 118 | Allen County |
| Great Lakes Forest Products (Plant #1) | IN2200057 | NTNCWS | Elkhart | 150 | Elkhart County |
| Great Lakes Forest Products, Inc-Plant 2 | IN2201077 | NTNCWS | Elkhart | 50 | Elkhart County |
| Great Lakes Forest Products, Inc-Plant 3 | IN2200258 | NTNCWS | Elkhart | 85 | Elkhart County |
| Green Acres Mobile Home Park | IN5221003 | CWS | Connersville | 32 | Fayette County |
| Green Acres Mobile Home Park | IN5243006 | CWS | Troy | 500 | Kosciusko County |
| Green Stream Company | IN2200191 | NTNCWS | Elkhart | 59 | Elkhart County |
| Greentown Municipal Water | IN5234006 | CWS | Greentown | 2,500 | Howard County |
| Grissom Middle School | IN2710811 | NTNCWS | Mishawaka | 687 | St. Joseph County |
| Hagerstown Municipal Water Works | IN5289008 | CWS | Hagerstown | 1,700 | Wayne County |
| Hamilton County Regional Utility | IN5229027 | CWS | Noblesville | 125 | Hamilton County |
| Hamilton Grove | IN5271024 | CWS | South Bend | 384 | St. Joseph County |
| Hamilton Water Department | IN5276023 | CWS | Hamilton | 2,675 | DeKalb County, Steuben County |
| Hamlet Water Works | IN5275001 | CWS | Hamlet | 801 | Starke County |
| Hanover College | IN5239010 | CWS | Hanover | 1,250 | Jefferson County |
| Hanover North Professional Building | IN2450882 | NTNCWS | Cedar Lake | 150 | Lake County |
| Harris Hills Mobile Home Park | IN5229011 | CWS | Anderson | 27 | Hamilton County |
| Harrison Christian School | IN2200045 | NTNCWS | Goshen | 200 | Elkhart County |
| Haubstadt Water Department | IN5226003 | CWS | Haubstadt | 1,600 | Gibson County |
| Haven Manufacturing Indiana | IN2900017 | NTNCWS | Ossian | 45 | Wells County |
| Hayden Water Association | IN5240005 | CWS | North Vernon | 2,395 | Jennings County |
| Hazleton Water Department | IN5226004 | CWS | Hazleton | 288 | Gibson County |
| Heartland Christian School | IN2330031 | NTNCWS | New Castle | 305 | Henry County |
| Heartland Community Church | IN2790026 | NTNCWS | Lafayette | 135 | Tippecanoe County |
| Heartland Ministries | IN2800800 | NTNCWS | Sharpsville | 350 | Tipton County |
| Heartland Remc | IN2350023 | NTNCWS | Markle | 31 | Huntington County |
| Heartland Resort | IN5230012 | CWS | Greenfield | 65 | Hancock County |
| Heartland Rv | IN2200990 | NTNCWS | Elkhart | 200 | Elkhart County |
| Heidelberg Materials | IN2020976 | NTNCWS | Fort Wayne | 36 | Allen County |
| Heidelberg Materials Us Cement Llc | IN2090019 | NTNCWS | Logansport | 95 | Cass County |
| Heidtman Steel Products - Office At Main | IN2170011 | NTNCWS | Butler | 114 | DeKalb County |
| Heidtman Steel Products - West At Main | IN2170040 | NTNCWS | Butler | 114 | DeKalb County |
| Henry County Jail | IN2330041 | NTNCWS | New Castle | 260 | Henry County |
| Henry County Memorial Hospital | IN2330034 | NTNCWS | New Castle | 55 | Henry County |
| Hensley Fabricating & Equipment | IN2500035 | NTNCWS | Tippecanoe | 40 | Marshall County |
| Heritage Hills Campground | IN5281029 | CWS | Brookville | 525 | Franklin County, Union County |
| Heritage Pointe | IN5235011 | CWS | Warren | 451 | Huntington County |
| Heritage School K-12 | IN2020031 | NTNCWS | New Haven | 1,350 | Allen County |
| Hershey Elementary School | IN2790013 | NTNCWS | Lafayette | 612 | Tippecanoe County |
| Hewitt Molding | IN2340039 | NTNCWS | Oakford | 70 | Howard County |
| Hi Grade Egg Producers | IN2850015 | NTNCWS | Kent | 25 | Wabash County |
| Hickory Lake Water Management Org | IN5211009 | CWS | Centerpoint | 45 | Clay County |
| Hickory Manor Mobile Home Park | IN5240012 | CWS | Cincinnati | 250 | Jennings County |
| Hideaway Hills | IN5243008 | CWS | Dallas | 470 | Kosciusko County |
| Hillsboro Water Utility | IN5223003 | CWS | Hillsboro | 540 | Fountain County |
| Hillsdale Water Corporation | IN5283007 | CWS | Hillsdale | 735 | Vermillion County |
| Hilltop Ridge Apartments | IN5252001 | CWS | Peru | 52 | Miami County |
| Hilltop Ridge Apartments Phase Two | IN5252019 | CWS | Peru | 29 | Cass County, Miami County |
| Hogan Water Corporation | IN5215005 | CWS | Aurora | 1,238 | Dearborn County |
| Holiday Woods Recreational Park | IN5276026 | CWS | Angola | 200 | Steuben County |
| Holland Water Works | IN5219006 | CWS | Holland | 1,200 | Dubois County |
| Holston Rentals | IN5271029 | CWS | Walkerton | 60 | Marshall County, St. Joseph County |
| Holton Community Water Corp. | IN5269008 | CWS | Holton | 2,363 | Ripley County |
| Holy Family School | IN2710890 | NTNCWS | South Bend | 320 | St. Joseph County |
| Holy Name Ch./Grand Tots Daycare | IN2450009 | NTNCWS | Cedar Lake | 115 | Lake County |
| Homestead Water Association | IN5290005 | CWS | Ossian | 50 | Wells County |
| Honeyville Metal, Inc.-Main Plant | IN2440017 | NTNCWS | Topeka | 95 | LaGrange County |
| Hoosier Pride Farms, Llc-Well #4 | IN2380021 | NTNCWS | Bryant | 70 | Jay County |
| Hoosier Racing Tire (Office Building) | IN2710014 | NTNCWS | Walkerton | 50 | St. Joseph County |
| Hoosier Youth Challenge Academy | IN5270007 | CWS | Indianapolis | 262 | Rush County |
| Hope Water Department | IN5203006 | CWS | Hope | 2,113 | Bartholomew County |
| Horizon Elementary School | IN2710891 | NTNCWS | Mishawaka | 671 | St. Joseph County |
| House Of The Lord | IN2500918 | NTNCWS | Plymouth | 89 | Marshall County |
| Howard Elementary School | IN2340803 | NTNCWS | Kokomo | 313 | Howard County |
| Hubner Industries, Llc | IN2860012 | NTNCWS | West Lebanon | 80 | Warren County |
| Hudson Water Works | IN5276022 | CWS | Hudson | 518 | LaGrange County, Steuben County |
| Humane Society Of Elkhart County | IN2200223 | NTNCWS | Elkhart | 60 | Elkhart County |
| Hymera Water Works | IN5277004 | CWS | Hymera | 1,015 | Sullivan County |
| In Dunes Natl Lakeshore-Bldgs 101-119 | IN2640899 | NTNCWS | Porter | 80 | Porter County |
| Indian Springs Town Homes | IN5246038 | CWS | Crown Point | 90 | LaPorte County |
| Indian Trail Elementary School | IN2460028 | NTNCWS | Laporte | 411 | LaPorte County |
| Indiana Academy | IN5229025 | CWS | Cicero | 113 | Hamilton County |
| Indiana American Water - Claypool | IN5243002 | CWS | Greenwood | 413 | Kosciusko County |
| Indiana American Water - Farmersburg | IN5277003 | CWS | Greenwood | 2,095 | Sullivan County, Vigo County |
| Indiana American Water - Mecca | IN5261004 | CWS | Greenwood | 905 | Parke County |
| Indiana American Water - Merom | IN5277005 | CWS | Greenwood | 380 | Sullivan County |
| Indiana American Water - Rivers Edge | IN5210022 | CWS | Greenwood | 610 | Clark County |
| Indiana American Water - Russiaville | IN5234008 | CWS | Greenwood | 1,178 | Howard County |
| Indiana American Water - Sheridan | IN5229014 | CWS | Greenwood | 4,435 | Hamilton County |
| Indiana American Water - Somerset | IN5285002 | CWS | Greenwood | 245 | Wabash County |
| Indiana American Water - Summitville | IN5248010 | CWS | Greenwood | 1,078 | Madison County |
| Indiana American Water - Waveland | IN5254012 | CWS | Greenwood | 605 | Montgomery County, Parke County |
| Indiana American Water - Yankeetown | IN5287008 | CWS | Greenwood | 1,838 | Warrick County |
| Indiana Gateway Industrial Park | IN2890907 | NTNCWS | Cambridge City | 2,125 | Wayne County |
| Indiana Masonic Home | IN5241010 | CWS | Indianapolis | 654 | Johnson County |
| Indiana Packers Corporation - Delphi | IN2080850 | NTNCWS | Delphi | 103 | Carroll County |
| Indiana Wood Products | IN2200122 | NTNCWS | Middlebury | 40 | Elkhart County |
| Indiana-Kentucky Electric Corporation | IN2390805 | NTNCWS | Madison | 320 | Jefferson County |
| Industrial Axle Company, Llc. | IN2201072 | NTNCWS | Elkhart | 80 | Elkhart County |
| Industrial Pallet Corp | IN2790021 | NTNCWS | Clarks Hill | 100 | Tippecanoe County |
| Instrumental Machine & Development | IN2430159 | NTNCWS | Warsaw | 124 | Kosciusko County |
| Inwood Estates | IN5250006 | CWS | Winamac | 50 | Marshall County |
| J Star Farms | IN2380023 | NTNCWS | Portland | 60 | Jay County |
| J. B. Water Works, Inc. | IN5246012 | CWS | Laporte | 307 | LaPorte County |
| J. T. International | IN2730837 | NTNCWS | Indianapolis | 52 | Shelby County |
| J.C. Manufacturing, Inc. | IN2430023 | NTNCWS | North Webster | 35 | Kosciusko County |
| Jackson County Water - Reddington | IN5236008 | CWS | Brownstown | 1,080 | Jackson County |
| Jackson Elementary School | IN2640023 | NTNCWS | Chesterton | 400 | Porter County |
| Jamestown Municipal Water | IN5206008 | CWS | Jamestown | 1,000 | Boone County |
| Jefferson Elementary School | IN2200043 | NTNCWS | Middlebury | 496 | Elkhart County |
| Jennings Northwest Regional Utility | IN5240002 | CWS | North Vernon | 2,955 | Jennings County |
| Jerome Christian Church And Preschool | IN2340038 | NTNCWS | Greentown | 535 | Howard County |
| Jimmerson Shores Co-Op | IN5276011 | CWS | Angola | 120 | Steuben County |
| Jimtown High School | IN2200033 | NTNCWS | Elkhart | 566 | Elkhart County |
| Jimtown Jr. High School & Elementary | IN2200809 | NTNCWS | Elkhart | 1,400 | Elkhart County |
| Jodhs Properties Llc | IN2460816 | NTNCWS | Rolling Prairie | 90 | LaPorte County |
| Jomar Machining - Bldg 1 | IN2200234 | NTNCWS | Middlebury | 67 | Elkhart County |
| Jonesboro Water Department | IN5227010 | CWS | Jonesboro | 2,034 | Grant County |
| Josiah Whites | IN5285020 | CWS | Wabash | 416 | Wabash County |
| Josiah Whites (Penguins) | IN5285008 | CWS | Wabash | 25 | Wabash County |
| Jsi Steel Distribution & Fabrication | IN2660013 | NTNCWS | Winamac | 27 | Pulaski County |
| Jupiter Coil Coating Div. | IN2730851 | NTNCWS | Fairland | 75 | Shelby County |
| Kaiser Aluminum Warrick Llc | IN2870001 | NTNCWS | Newburgh | 1,200 | Warrick County |
| Kalenborn Abresist Corporation | IN2850006 | NTNCWS | Urbana | 37 | Wabash County |
| Kampco Steel Products Inc. | IN2201075 | NTNCWS | Elkhart | 50 | Elkhart County |
| Kentland Water Works | IN5256005 | CWS | Kentland | 1,735 | Newton County |
| Kessington Machine | IN2200104 | NTNCWS | Elkhart | 125 | Elkhart County |
| Kewanna Water Works | IN5225003 | CWS | Kewanna | 678 | Fulton County |
| Keystone Rv | IN2440047 | NTNCWS | Goshen | 170 | LaGrange County |
| Keystone Rv Company - Dutchmen Plant 815 | IN2200054 | NTNCWS | Goshen | 100 | Elkhart County |
| Kids On The Rock Daycare | IN2290021 | NTNCWS | Noblesville | 250 | Hamilton County |
| Kingman Water Works | IN5223004 | CWS | Kingman | 560 | Fountain County |
| Kings Court Mobile Home Park | IN5252012 | CWS | Wabash | 70 | Miami County |
| Kings Ridge Homeowners Association | IN5279023 | CWS | Lafayette | 90 | Tippecanoe County |
| Kingsbury Elementary School | IN2460026 | NTNCWS | Laporte | 400 | LaPorte County |
| Kingsbury Utility Corporation | IN5246013 | CWS | Kingsbury | 240 | LaPorte County |
| Kingsford Heights Water | IN5246014 | CWS | Kingsford Heights | 1,800 | LaPorte County |
| Kirklin Water Department | IN5212004 | CWS | Kirklin | 788 | Clinton County |
| Kmc Controls | IN2200932 | NTNCWS | New Paris | 161 | Elkhart County |
| Knightstown Water Utility | IN5233005 | CWS | Indianapolis | 2,182 | Henry County |
| Knightsville Water Works | IN5211006 | CWS | Terre Haute | 1,523 | Clay County |
| Knollwood Country Club | IN2710882 | NTNCWS | Granger | 340 | St. Joseph County |
| Knox County Water, Inc. | IN5242018 | CWS | Vincennes | 3,525 | Knox County |
| Kouts Water Works | IN5264013 | CWS | Kouts | 2,028 | Porter County |
| Kozy Kourt Dba Silo Farms | IN5290004 | CWS | Ossian | 325 | Wells County |
| Kraft Heinz Food Company | IN2570866 | NTNCWS | Kendallville | 300 | Noble County |
| Kulich Rentals Inc. | IN5236010 | CWS | Seymour | 61 | Jackson County |
| Kz, Inc. Well #1 | IN2440988 | NTNCWS | Shipshewana | 56 | LaGrange County |
| Kz, Inc. Well #2 | IN2441068 | NTNCWS | Shipshewana | 84 | LaGrange County |
| Kz, Inc. Well #3 | IN2440025 | NTNCWS | Shipshewana | 491 | LaGrange County |
| L & M Regional Water District | IN5268013 | CWS | Losantville | 450 | Randolph County |
| L-A-C Utilities | IN5264033 | CWS | Valparaiso | 2,441 | Porter County |
| L.B. Sommer Elementary School | IN2540921 | NTNCWS | Crawfordsville | 403 | Montgomery County |
| Lacrosse Water Department | IN5246015 | CWS | North Judson | 540 | LaPorte County |
| Ladoga Water Works | IN5254006 | CWS | Ladoga | 1,180 | Montgomery County |
| Lafayette A-Ok Campground | IN2790931 | NTNCWS | Lafayette | 115 | Tippecanoe County |
| Lafontaine Water Company | IN5285004 | CWS | Lafontaine | 906 | Wabash County |
| Lagrange Department Of Water Works | IN5244003 | CWS | Lagrange | 2,625 | LaGrange County |
| Lagro Municipal Water Department | IN5285005 | CWS | Lagro | 438 | Wabash County |
| Laidig Inc. | IN2710893 | NTNCWS | Mishawaka | 104 | St. Joseph County |
| Lake Cicott Shores | IN5209005 | CWS | Monticello | 94 | Cass County |
| Lake City Heat Treating | IN2430275 | NTNCWS | Warsaw | 30 | Kosciusko County |
| Lake Estates Manufactured Home Community | IN5243010 | CWS | Farmington Hills | 192 | Kosciusko County |
| Lake Hill Park - Thayer Inc. | IN5291007 | CWS | Monon | 104 | White County |
| Lake Of The Woods Mhp | IN5244005 | CWS | Hudson | 46 | LaGrange County |
| Lake Prairie Elementary | IN2450014 | NTNCWS | Lowell | 540 | Lake County |
| Lake Santee Rwwd | IN5216003 | CWS | Greensburg | 1,500 | Decatur County |
| Lake View Mobile Home Park | IN5243053 | CWS | Leesburg | 62 | Kosciusko County |
| Lake View Mobile Home Park | IN5285006 | CWS | Wabash | 90 | Wabash County |
| Lake Village Elementary School | IN2560008 | NTNCWS | Morocco | 268 | Newton County |
| Lakeland Outlets | IN2760865 | NTNCWS | Fremont | 165 | Steuben County |
| Lakeshore Subdivision Association, Inc. | IN5245053 | CWS | Cedar Lake | 265 | Lake County |
| Lakeside Management | IN5237016 | CWS | Carmel | 63 | Jasper County |
| Lakeside Manor Mobile Home Park | IN5244002 | CWS | Farmington Hills | 215 | LaGrange County |
| Lakeview Wesleyan Church & Elementary | IN2270854 | NTNCWS | Marion | 750 | Grant County |
| Lakeville Water Department | IN5271008 | CWS | Lakeville | 750 | St. Joseph County |
| Lakewood Mobile Home Park | IN5291012 | CWS | Richmond | 25 | White County |
| Lakewood Park Baptist Church/School | IN2170867 | NTNCWS | Auburn | 1,100 | DeKalb County |
| Lalumiere School | IN2460835 | NTNCWS | Valparaiso | 245 | LaPorte County |
| Landmark Daycare | IN2090869 | NTNCWS | Logansport | 150 | Cass County |
| Lanesville Water Works | IN5231003 | CWS | Lanesville | 1,009 | Harrison County |
| Lapel Municipal Water Company | IN5248013 | CWS | Lapel | 2,379 | Madison County |
| Laporte County Regional Swd/Toll Road Pl | IN2460162 | NTNCWS | Indianapolis | 675 | LaPorte County |
| Laurel Water Department | IN5224004 | CWS | Laurel | 800 | Franklin County |
| Laville Elementary School | IN2500826 | NTNCWS | Lakeville | 650 | Marshall County |
| Lazy Oaks | IN5291008 | CWS | Crown Point | 48 | White County |
| Leavenworth Water Company | IN5213004 | CWS | Leavenworth | 233 | Crawford County |
| Leesburg Elem School | IN2430195 | NTNCWS | Warsaw | 542 | Kosciusko County |
| Legacy Christian Academy - Main Lodge | IN2250841 | NTNCWS | Rochester | 240 | Fulton County |
| Legacy Ministries Dba Legacy Childcare | IN2540006 | NTNCWS | Crawfordsville | 130 | Montgomery County |
| Legado Development Strip Mall | IN2790039 | NTNCWS | Lafayette | 134 | Tippecanoe County |
| Leisure Acres Mobile Home Park | IN5284019 | CWS | West Terre Haute | 49 | Vigo County |
| Leisure Lakes Mobile Home Court | IN5276025 | CWS | Angola | 27 | Steuben County |
| Leisure Lane Mobile Home Park | IN5257026 | CWS | Kimmell | 31 | Noble County |
| Len-Del Mobile Home Court | IN5289009 | CWS | Milton | 100 | Wayne County |
| Leo High School | IN2020911 | NTNCWS | New Haven | 1,395 | Allen County |
| Lewisville Water Works | IN5233006 | CWS | Knightstown | 392 | Henry County |
| Lgs In, Llc Dba Look Trailers | IN2201023 | NTNCWS | Osceola | 125 | Elkhart County |
| Liberty Country Club- Housing Develop. | IN5281003 | CWS | Liberty | 34 | Union County |
| Liberty Farms Mobile Home Park - #1 | IN5264017 | CWS | Orem | 390 | Porter County |
| Liberty Mobile Home Park | IN5227007 | CWS | Ojai | 50 | Grant County |
| Liberty Water Works | IN5281001 | CWS | Liberty | 2,133 | Union County |
| Lifepointe Church | IN2290012 | NTNCWS | Westfield | 52 | Hamilton County |
| Lifespring Wesleyan Church & Daycare | IN2890021 | NTNCWS | Richmond | 704 | Wayne County |
| Lift-A-Loft | IN2180035 | NTNCWS | Muncie | 48 | Delaware County |
| Lighthouse Baptist Church | IN2790030 | NTNCWS | Lafayette | 188 | Tippecanoe County |
| Lighthouse Restaurant At Paradise Cove | IN2450063 | NTNCWS | Cedar Lake | 300 | Lake County |
| Lincoln Elementary School | IN2560007 | NTNCWS | Morocco | 401 | Newton County |
| Linda Ann Mobile Home Park | IN5276024 | CWS | Angola | 30 | Steuben County |
| Linden Water Department | IN5254007 | CWS | Linden | 759 | Montgomery County |
| Linel Llc | IN2550943 | NTNCWS | Mooresville | 80 | Morgan County |
| Lippert Components - Howe Division | IN2441033 | NTNCWS | Middlebury | 64 | LaGrange County |
| Lippert Components, Inc. Plant #28 | IN2200080 | NTNCWS | Middlebury | 450 | Elkhart County |
| Little Eagle Creek Estates | IN5229017 | CWS | Westfield | 35 | Hamilton County |
| Little Scholars/Compass Church | IN2180026 | NTNCWS | Muncie | 328 | Delaware County |
| Logan Community Resources | IN2710870 | NTNCWS | South Bend | 30 | St. Joseph County |
| Long Beach Water Department | IN5246028 | CWS | Long Beach | 2,050 | LaPorte County |
| Loves Travel Plaza - Knightstown (#601) | IN2330023 | NTNCWS | Wanatah | 575 | Henry County |
| Loves Travel Stop #451 | IN2410964 | NTNCWS | Indianapolis | 290 | Johnson County |
| Lowell Commons | IN2450059 | NTNCWS | Crown Point | 1,440 | Lake County |
| Lsc Communications Book Llc | IN2540942 | NTNCWS | Crawfordsville | 1,000 | Montgomery County |
| Lta Manufacturing | IN2201022 | NTNCWS | Elkhart | 70 | Elkhart County |
| Lydick Methodist Church | IN2710589 | NTNCWS | South Bend | 140 | St. Joseph County |
| Lyford Water Works | IN5261002 | CWS | Rosedale | 1,000 | Parke County |
| Lynn Hill Court & Charles Manor | IN5291009 | CWS | Richmond | 44 | White County |
| Lynn Water Company | IN5268004 | CWS | Lynn | 1,097 | Randolph County |
| Lynnville Water Works | IN5287006 | CWS | Lynnville | 1,200 | Warrick County |
| Lyons Water Utility | IN5228006 | CWS | Lyons | 1,125 | Greene County |
| M & K Truck Center | IN2120013 | NTNCWS | Frankfort | 61 | Clinton County |
| Maconaquah School Corporation | IN2520836 | NTNCWS | Bunker Hill | 2,100 | Miami County |
| Madison Elementary School | IN2710032 | NTNCWS | Mishawaka | 127 | St. Joseph County |
| Madison State Hospital | IN5239005 | CWS | Indianapolis | 1,375 | Jefferson County |
| Madison-Grant High School | IN2270020 | NTNCWS | Fairmount | 630 | Grant County |
| Magnolia Place East | IN5292009 | CWS | Brooklyn | 54 | Whitley County |
| Magnolia Place South | IN5292010 | CWS | Brooklyn | 70 | Whitley County |
| Magnolia Place West | IN5257016 | CWS | Brooklyn | 51 | Noble County |
| Majestic Care Of Mccordsville | IN2300869 | NTNCWS | Mccordsville | 78 | Hancock County |
| Mallards Pointe Water System | IN5264041 | CWS | Wanatah | 150 | Porter County |
| Manchester Intermediate | IN2850844 | NTNCWS | North Manchester | 385 | Wabash County |
| Maple Lane Village Mobile Home Park | IN5209004 | CWS | Mather | 232 | Cass County |
| Maple Lawn Village | IN5252013 | CWS | Farmington Hills | 250 | Miami County |
| Maple Leaf Farms | IN2430953 | NTNCWS | Leesburg | 520 | Kosciusko County |
| Maple Leaf Farms World Headquarters | IN2430014 | NTNCWS | Leesburg | 108 | Kosciusko County |
| Mapleturn Utilities, Inc. | IN5255004 | CWS | Martinsville | 1,725 | Morgan County |
| Maplewood Estates Mhc Llc | IN5229003 | CWS | Belleville | 37 | Hamilton County |
| Marion First Friends Church | IN2270012 | NTNCWS | Marion | 80 | Grant County |
| Markle Water Utility | IN5235006 | CWS | Markle | 1,095 | Huntington County, Wells County |
| Marshall Water Works | IN5261003 | CWS | Marshall | 417 | Parke County |
| Martin Marietta - Kentucky Avenue Mine | IN2490024 | NTNCWS | Carmel | 59 | Marion County |
| Martin Marietta - Noblesville Stone | IN2290050 | NTNCWS | Carmel | 71 | Hamilton County |
| Mary Frank Elementary School | IN2710035 | NTNCWS | Mishawaka | 393 | St. Joseph County |
| Maxwell Middle School | IN2300867 | NTNCWS | Greenfield | 600 | Hancock County |
| Mays Community Academy | IN2700007 | NTNCWS | New Castle | 236 | Rush County |
| Maysville Region. Water & Sewer District | IN5202037 | CWS | Harlan | 1,634 | Allen County |
| Mcdonalds | IN2370090 | NTNCWS | Rensselaer | 786 | Jasper County |
| Mcgonigal Buick Gmc | IN2340030 | NTNCWS | Kokomo | 65 | Howard County |
| Mcgrawsville Community Ch/Promised Land | IN2520029 | NTNCWS | Amboy | 60 | Miami County |
| Mcp - Magic Coil Products | IN2170026 | NTNCWS | Butler | 70 | DeKalb County |
| Meadow Acres Mobile Home Park | IN5243012 | CWS | Elkhart | 93 | Kosciusko County |
| Meadows Edge Elementary School | IN2710907 | NTNCWS | Mishawaka | 426 | St. Joseph County |
| Meadowview Elementary School | IN2441066 | NTNCWS | Topeka | 411 | LaGrange County |
| Mecks Whispering Pines Ii Llc | IN5243033 | CWS | West Covina | 598 | Kosciusko County |
| Medallion Plastics - Plant 1 | IN2201076 | NTNCWS | Elkhart | 70 | Elkhart County |
| Medallion Plastics - Plant 2 | IN2200236 | NTNCWS | Elkhart | 70 | Elkhart County |
| Medaryville Water Company | IN5266003 | CWS | Medaryville | 614 | Pulaski County |
| Medora Water Department | IN5236004 | CWS | Medora | 873 | Jackson County |
| Mentone Water Company | IN5243013 | CWS | Mentone | 1,001 | Kosciusko County |
| Merom Generating Station | IN2770800 | NTNCWS | Sullivan | 250 | Sullivan County |
| Merrywood Mobile Home Park | IN5243014 | CWS | Pierceton | 210 | Kosciusko County |
| Metal Forming Industries | IN2670012 | NTNCWS | Russellville | 31 | Putnam County |
| Metalstamp, Inc. | IN2710040 | NTNCWS | Mason | 49 | St. Joseph County |
| Metro North Elementary School | IN2850839 | NTNCWS | Wabash | 350 | Wabash County |
| Metzger Dairy | IN2570090 | NTNCWS | Kimmell | 32 | Noble County |
| Miami Village Mobile Home Park | IN5292006 | CWS | Clearwater | 215 | Whitley County |
| Michiana Estates Llc - Water System | IN5246026 | CWS | Bridgeman | 35 | LaPorte County |
| Micropulse Incorporated | IN2920022 | NTNCWS | Columbia City | 485 | Whitley County |
| Middlebury Cheese Co. Llc | IN2440857 | NTNCWS | Middlebury | 350 | LaGrange County |
| Middletown Water Utility | IN5233008 | CWS | Middleton | 2,050 | Henry County |
| Milan Water Works | IN5269003 | CWS | Milan | 2,070 | Dearborn County, Ripley County |
| Milford Water Department | IN5243017 | CWS | Milford | 1,556 | Kosciusko County |
| Mill Creek East Elementary School | IN2320019 | NTNCWS | Clayton | 455 | Hendricks County |
| Mill Creek West Elementary School | IN2320014 | NTNCWS | Clayton | 325 | Hendricks County |
| Mill Road Estates | IN5202010 | CWS | Durham | 150 | Allen County |
| Millersburg Water Company | IN5220015 | CWS | Millersburg | 957 | Elkhart County |
| Millwood Acres, Inc. | IN5243016 | CWS | Ojai | 113 | Kosciusko County |
| Milton Water Works | IN5289011 | CWS | Milton | 650 | Wayne County |
| Minnich - Ample | IN2380029 | NTNCWS | Portland | 30 | Jay County |
| Minnich - Limberlost | IN2380031 | NTNCWS | Portland | 30 | Jay County |
| Minnich - Midland | IN2380030 | NTNCWS | Portland | 30 | Jay County |
| Mintonye Elementary School | IN2790012 | NTNCWS | Lafayette | 548 | Tippecanoe County |
| Mobil-Rama | IN5276013 | CWS | Angola | 30 | Steuben County |
| Model 1 Inc | IN2200034 | NTNCWS | Elkhart | 30 | Elkhart County |
| Modernaire Trailer Court | IN5279014 | CWS | Kentland | 105 | Tippecanoe County |
| Modular Tech. Service (Plastics Plant) | IN2200052 | NTNCWS | Elkhart | 35 | Elkhart County |
| Monon Water Utility | IN5291010 | CWS | Monon | 1,700 | White County |
| Monroe Central School Corp. | IN2680008 | NTNCWS | Parker City | 993 | Randolph County |
| Monroe City Water Utilities | IN5242008 | CWS | Monroe City | 813 | Knox County |
| Monroe Water Department | IN5201004 | CWS | Monroe | 872 | Adams County |
| Monroeville Water Works | IN5202008 | CWS | Monroeville | 1,400 | Allen County |
| Montezuma Municipal Utility | IN5261005 | CWS | Montezuma | 1,022 | Parke County |
| Montgomery Water Works | IN5214004 | CWS | Montgomery | 900 | Daviess County |
| Montpelier Water Works | IN5205004 | CWS | Montpelier | 1,515 | Blackford County |
| Mooresville Acres | IN5255017 | CWS | Indianapolis | 752 | Hendricks County, Morgan County |
| Morgan Township School | IN2640883 | NTNCWS | Kouts | 700 | Porter County |
| Morgantown Water Utility | IN5255011 | CWS | Nashville | 1,000 | Brown County, Morgan County |
| Morocco Water Department | IN5256006 | CWS | Morocco | 1,200 | Newton County |
| Morris Mobile Home Estates | IN5284029 | CWS | Terre Haute | 75 | Vigo County |
| Morristown Water Department | IN5273003 | CWS | Morristown | 1,218 | Shelby County |
| Mount Summit Water Utility | IN5233009 | CWS | Mt. Summit | 350 | Henry County |
| Mulberry Water Works | IN5212005 | CWS | Mulberry | 1,252 | Clinton County |
| Muscatatuck Urban Training Center | IN5240007 | CWS | Butlerville | 40 | Jennings County |
| N.P Westville Industrial, Llc | IN2460855 | NTNCWS | Kansas City | 204 | LaPorte County |
| Nameless Creek Youth Camp, Inc. | IN2300045 | NTNCWS | Greenfield | 30 | Hancock County |
| Nappanee Missionary Church | IN2200030 | NTNCWS | Nappanee | 2,545 | Elkhart County |
| Nativity Catholic School | IN2490021 | NTNCWS | New Palestine | 425 | Marion County |
| Natural Prairie Dairy - Indiana | IN2560027 | NTNCWS | Lake Village | 50 | Newton County |
| Navistar Proving Grounds | IN2710002 | NTNCWS | New Carlisle | 80 | St. Joseph County |
| Neighbors Of Beechwood Llc | IN5246002 | CWS | Lapeer | 63 | LaPorte County |
| Neighbors Of Pine Hills Holdings, Llc | IN5220032 | CWS | Lapeer | 332 | Elkhart County |
| Neighbors Of Pioneer Crossings, Llc | IN5244011 | CWS | Lapeer | 60 | LaGrange County |
| Neighbors Of Rolling Prairie | IN5246023 | CWS | Lapeer | 70 | LaPorte County |
| Neighbors Of Timbercreek | IN5243007 | CWS | Lapeer | 110 | Kosciusko County |
| Neighbors Of Westville Estates Llc | IN5246031 | CWS | Lapeer | 315 | LaPorte County |
| New Amsterdam Quarry/Mulzer Crushed Ston | IN2310804 | NTNCWS | Tell City | 50 | Harrison County |
| New Carlisle Water Works | IN5271011 | CWS | Rolling Prairie | 1,861 | St. Joseph County |
| New Castle Correctional Facility | IN5233001 | CWS | Indianapolis | 3,160 | Henry County |
| New Durham Estates | IN5246032 | CWS | Westville | 1,099 | LaPorte County |
| New Harmony Water Utility | IN5265007 | CWS | New Harmony | 1,633 | Posey County |
| New Life Christian Fellowship | IN2300012 | NTNCWS | Fortville | 210 | Hancock County |
| New Market Water Works | IN5254008 | CWS | New Market | 765 | Montgomery County |
| New Millennium Building Systems, Llc | IN2170001 | NTNCWS | Fort Wayne | 270 | DeKalb County |
| New Palestine Bus Garage | IN2300841 | NTNCWS | New Castle | 25 | Hancock County |
| New Paris Elementary School (New Bldg) | IN2201114 | NTNCWS | Goshen | 538 | Elkhart County |
| New Prairie Schools | IN2460037 | NTNCWS | New Carlisle | 1,800 | LaPorte County |
| New Process Steel | IN2170021 | NTNCWS | Butler | 37 | DeKalb County |
| New Richmond Water Works | IN5254009 | CWS | New Richmond | 330 | Montgomery County |
| New Testament Church Of Christ | IN2890040 | NTNCWS | Hagerstown | 125 | Wayne County |
| Newberry Water Utility | IN5228007 | CWS | Worthington | 249 | Greene County |
| Newco Metals | IN2480023 | NTNCWS | Pendleton | 60 | Madison County |
| Newport Water Works | IN5283008 | CWS | Newport | 495 | Vermillion County |
| Newton Co Rgl Water & Sewer - Fair Oaks | IN2560806 | NTNCWS | Morocco | 2,239 | Newton County |
| Newton Co. Regional Water & Sewer | IN5256009 | CWS | Morocco | 130 | Newton County |
| Newton County Egg Farm | IN2560831 | NTNCWS | Seymour | 80 | Newton County |
| Newton County Generations Center | IN2560010 | NTNCWS | Morocco | 62 | Newton County |
| Ng Instruments, Inc./Avalign | IN2430136 | NTNCWS | Warsaw | 200 | Kosciusko County |
| Nickell Moulding Co., Inc. | IN2200583 | NTNCWS | Elkhart | 80 | Elkhart County |
| Ninestar Connect | IN2300018 | NTNCWS | Greenfield | 66 | Hancock County |
| Ninestar Connect - Gem Water | IN5230008 | CWS | Greenfield | 1,837 | Hancock County |
| Nipsco Facility - R.M. Schahfer Plant | IN2370016 | NTNCWS | Wheatfield | 315 | Jasper County |
| Noble Oaks Subdivision Water Association | IN5245054 | CWS | Cedar Lake | 70 | Lake County |
| North Judson Water Company | IN5275003 | CWS | North Judson | 1,800 | Starke County |
| North Liberty Church Of Christ | IN2710846 | NTNCWS | North Liberty | 574 | St. Joseph County |
| North Liberty Water Works | IN5271010 | CWS | Walkerton | 1,896 | St. Joseph County |
| North Miami Elementary School | IN2520853 | NTNCWS | Denver | 600 | Miami County |
| North Miami High School | IN2520860 | NTNCWS | Denver | 501 | Miami County |
| North Montgomery High School | IN2540007 | NTNCWS | Crawfordsville | 709 | Montgomery County |
| North Montgomery Middle School | IN2540944 | NTNCWS | Crawfordsville | 522 | Montgomery County |
| North Newton Jr./Sr. High School | IN2560006 | NTNCWS | Morocco | 753 | Newton County |
| North Putnam Middle/High School | IN2670820 | NTNCWS | Bainbridge | 1,100 | Putnam County |
| North Salem Water Corporation | IN5232017 | CWS | North Salem | 515 | Hendricks County |
| North Webster Elementary | IN2431140 | NTNCWS | Syracuse | 475 | Kosciusko County |
| Northeastern Elementary | IN2890826 | NTNCWS | Fountain City | 684 | Wayne County |
| Northeastern Wayne High School | IN2890012 | NTNCWS | Fountain City | 739 | Wayne County |
| Northern Heights Elementary School | IN2920880 | NTNCWS | Columbia City | 566 | Whitley County |
| Northern Indiana Surgery Center | IN2710115 | NTNCWS | Granger | 47 | St. Joseph County |
| Northfield Elementary | IN2850836 | NTNCWS | Wabash | 300 | Wabash County |
| Northfield Jr./Sr. High School | IN2850009 | NTNCWS | Wabash | 475 | Wabash County |
| Northpoint Elementary School | IN2710906 | NTNCWS | Mishawaka | 612 | St. Joseph County |
| Northport Mobile Home Park | IN5257011 | CWS | Lagrange | 47 | Noble County |
| Northwest Indiana Islamic Center | IN2450055 | NTNCWS | Valparaiso | 199 | Lake County |
| Northwest United Methodist Church, Inc. | IN2710594 | NTNCWS | South Bend | 138 | St. Joseph County |
| Northwestern Elementary School | IN2340016 | NTNCWS | Kokomo | 634 | Howard County |
| Northwestern Jr./Sr. High School | IN2340014 | NTNCWS | Kokomo | 1,000 | Howard County |
| Norton Packaging Inc. | IN2750029 | NTNCWS | Hamlet | 70 | Starke County |
| Norwell High School | IN2900008 | NTNCWS | Ossian | 900 | Wells County |
| Norwell Middle School | IN2900012 | NTNCWS | Ossian | 720 | Wells County |
| Norwood Regional Water & Sewage | IN5235004 | CWS | Huntington | 486 | Huntington County |
| Novelis Rolled Products Drink Water Sys. | IN2840883 | NTNCWS | Terre Haute | 200 | Vigo County |
| Nucor Fastener | IN2170850 | NTNCWS | Saint Joe | 243 | DeKalb County |
| Nucor Steel | IN2540819 | NTNCWS | Crawfordsville | 750 | Montgomery County |
| Nucor Steel (Building #2) | IN2540947 | NTNCWS | Crawfordsville | 50 | Montgomery County |
| Oak Brook Estates | IN5234003 | CWS | Cincinnati | 455 | Howard County |
| Oak Hill Jr./Sr. High School | IN2270805 | NTNCWS | Converse | 860 | Grant County |
| Oak Wood Circle | IN5243064 | CWS | Milford | 30 | Kosciusko County |
| Oakland City Water Department | IN5226005 | CWS | Oakland City | 2,938 | Gibson County |
| Oaktown Water Works | IN5242009 | CWS | Farmersburg | 832 | Knox County |
| Oakwood Community Association, Inc. | IN5201009 | CWS | Decatur | 210 | Adams County |
| Oakwood Mobile Home Park | IN5245034 | CWS | Cedar Lake | 45 | Lake County |
| Odon Water Utilities, Inc. | IN5214005 | CWS | Odon | 1,703 | Daviess County |
| Ogden Dunes Water | IN5264040 | CWS | Ogden Dunes | 1,110 | Porter County |
| Old Castle | IN2170036 | NTNCWS | Waterloo | 29 | DeKalb County |
| Oldenburg Water Works | IN5224006 | CWS | Oldenburg | 880 | Franklin County |
| Oolitic Water Works | IN5247005 | CWS | Oolitic | 1,315 | Lawrence County |
| Opportunity Enterprises (Lakeside) | IN2640038 | NTNCWS | Valparaiso | 160 | Porter County |
| Or-An Trailer Court | IN5276015 | CWS | Waterloo | 55 | Steuben County |
| Oregon-Davis Elementary & High School | IN2750008 | NTNCWS | Hamlet | 575 | Starke County |
| Orestes Water Works | IN5248017 | CWS | Orestes | 400 | Madison County |
| Orion Safety Products | IN2520028 | NTNCWS | Peru | 100 | Miami County |
| Orion Safety Products | IN2520818 | NTNCWS | Peru | 100 | Miami County |
| Orland Water Works | IN5276027 | CWS | Orland | 530 | Steuben County |
| Orleans Water Works | IN5259003 | CWS | Orleans | 2,260 | Lawrence County, Orange County |
| Osgood Water Department | IN5269004 | CWS | Osgood | 1,692 | Ripley County |
| Ossian Municipal Water Department | IN5290002 | CWS | Ossian | 3,289 | Wells County |
| Otterbein Water Department | IN5204004 | CWS | Otterbein | 1,262 | Benton County, Tippecanoe County |
| Otwell Water Corp. #2 | IN5263007 | CWS | Otwell | 705 | Pike County |
| Otwell Water Corporation | IN5263001 | CWS | Otwell | 2,100 | Pike County |
| Outlet Shoppes At Fremont #3 | IN2760975 | NTNCWS | Fremont | 215 | Steuben County |
| Owensville Water Works | IN5226006 | CWS | Owensville | 2,148 | Gibson County |
| Oxford Water Utility | IN5204005 | CWS | Oxford | 1,200 | Benton County |
| Painted Hills Utility Company | IN5255012 | CWS | Martinsville | 1,560 | Morgan County |
| Pallet One, Inc. | IN2440032 | NTNCWS | Shipshewana | 65 | LaGrange County |
| Par-Kan Company | IN2430926 | NTNCWS | Silver Lake | 85 | Kosciusko County |
| Paragon Steel | IN2170853 | NTNCWS | Butler | 60 | DeKalb County |
| Paragon Water Works | IN5255013 | CWS | Paragon | 650 | Morgan County |
| Park One Water | IN2180926 | NTNCWS | Yorktown | 1,325 | Delaware County |
| Parker City Water Department | IN5268007 | CWS | Parker | 1,400 | Randolph County |
| Patoka Water & Electric | IN5226007 | CWS | Patoka | 750 | Gibson County |
| Patoka Water Company, Inc. | IN5213007 | CWS | Birdseye | 1,038 | Crawford County |
| Patrick Industries (Plant #1) | IN2201087 | NTNCWS | Elkhart | 68 | Elkhart County |
| Paxton Water Corporation | IN5277006 | CWS | Paxton | 2,013 | Sullivan County |
| Peace Lutheran Church-Preschool & Daycar | IN2760957 | NTNCWS | Fremont | 370 | Steuben County |
| Peek A Boo Lake (Spring) | IN2880002 | NTNCWS | Pekin | 40 | Washington County |
| Pence Water Works | IN5286002 | CWS | Williamsport | 37 | Warren County |
| Pennville Water Company | IN5238006 | CWS | Dunkirk | 706 | Jay County |
| Perrysville Water Works | IN5283009 | CWS | Perrysville | 470 | Vermillion County |
| Peru Utilities/Grissom | IN5252011 | CWS | Peru | 2,500 | Miami County |
| Petro Stopping Center #74 | IN2180877 | NTNCWS | West Lake | 1,017 | Delaware County |
| Peytons Northern Satellite 102 | IN2900025 | NTNCWS | Fort Wayne | 40 | Wells County |
| Philly Estates Llc | IN5230005 | CWS | Kentland | 190 | Hancock County |
| Pickle Properties | IN2170822 | NTNCWS | Saint Joe | 55 | DeKalb County |
| Pierceton Water Works | IN5243018 | CWS | Pierceton | 928 | Kosciusko County |
| Pilot #029 | IN2760980 | NTNCWS | Knoxville | 570 | Steuben County |
| Pilot #339 Dba One 9 Fuel Stop | IN2830001 | NTNCWS | Knoxville | 1,530 | Vermillion County |
| Pilot Travel Center #037 | IN2410948 | NTNCWS | Knoxville | 1,564 | Johnson County |
| Pilot/Wendys #448 | IN2450878 | NTNCWS | Knoxville | 2,435 | Lake County |
| Pine Manor/Miller Poultry | IN2760940 | NTNCWS | Orland | 500 | Steuben County |
| Pine Meadows Estate | IN5257018 | CWS | Cromwell | 21 | Noble County |
| Pine Ridge | IN5206004 | CWS | Westfield | 135 | Boone County |
| Pine Village Elementary | IN2860004 | NTNCWS | Williamsport | 165 | Warren County |
| Pinecrest/Stuckman Mobile Home Parks | IN5243019 | CWS | Syracuse | 46 | Kosciusko County |
| Pines Mobile Home Park | IN5289013 | CWS | Cambridge City | 25 | Wayne County |
| Pioneer Hi-Bred Intl-Resrch Ctr Windfall | IN2800005 | NTNCWS | Windfall | 220 | Tipton County |
| Pioneer Hi-Bred Intl., Inc. - West Well | IN2700831 | NTNCWS | Rushville | 65 | Rush County |
| Pioneer Hi-Bred Intl/Produc Plant | IN2800820 | NTNCWS | Tipton | 140 | Tipton County |
| Pioneer Truck Stop | IN2760819 | NTNCWS | Hamilton | 475 | Steuben County |
| Pioneer Water L.L.C. | IN5202034 | CWS | St. Joe | 2,076 | Allen County |
| Pipe Creek Elementary | IN2520816 | NTNCWS | Bunker Hill | 350 | Miami County |
| Pitt-Ohio - Office Building | IN2490056 | NTNCWS | Monrovia | 118 | Marion County |
| Pleasant Hill Elementary School | IN2540920 | NTNCWS | Crawfordsville | 341 | Montgomery County |
| Pleasant Lake School/Msd Of Steuben Co. | IN2760835 | NTNCWS | Hamilton | 170 | Steuben County |
| Pleasant View Bible Church/Dc | IN2430271 | NTNCWS | Warsaw | 597 | Kosciusko County |
| Pleasantview Utilities, Inc. | IN5221004 | CWS | Connersville | 500 | Fayette County |
| Pleasantville Water Company | IN5277007 | CWS | Dugger | 924 | Sullivan County |
| Plymouth Wesleyan Church | IN2500177 | NTNCWS | Plymouth | 707 | Marshall County |
| Poet Holdings, Llc Dba Poet Biorefining | IN2850010 | NTNCWS | North Manchester | 42 | Wabash County |
| Pokagon State Park (Park Office) | IN2760901 | NTNCWS | Angola | 952 | Steuben County |
| Ponderosa Estates | IN5243052 | CWS | Lapeer | 55 | Kosciusko County |
| Portland Forge | IN2380060 | NTNCWS | Portland | 137 | Jay County |
| Poseyville Municipal Water Department | IN5265008 | CWS | Poseyville | 1,400 | Posey County |
| Prairie Heights High School | IN2440909 | NTNCWS | Angola | 1,583 | LaGrange County |
| Prairie View Elementary School | IN2460881 | NTNCWS | New Carlisle | 370 | LaPorte County |
| Precision Grinding & Sharpening | IN2430261 | NTNCWS | Warsaw | 34 | Kosciusko County |
| Precision Wire Services | IN2430021 | NTNCWS | North Webster | 30 | Kosciusko County |
| Premier Ethanol Dba Poet Biorefining | IN2380018 | NTNCWS | Portland | 130 | Jay County |
| Prestress Services Ind. -Batch Plant | IN2010041 | NTNCWS | Decatur | 25 | Adams County |
| Prestress Services Industries - Office | IN2010040 | NTNCWS | Decatur | 60 | Adams County |
| Pretty Lake Golf Club | IN2500871 | NTNCWS | Plymouth | 280 | Marshall County |
| Pretty View Condominium Owners Assoc | IN5250014 | CWS | Plymouth | 85 | Marshall County |
| Primary Products Ingredients Americas | IN2790947 | NTNCWS | Lafayette | 336 | Tippecanoe County |
| Proportion Air | IN2300844 | NTNCWS | Mccordsville | 131 | Hancock County |
| Prossers Country Estates | IN5285012 | CWS | Monticello | 85 | Wabash County |
| Pulaski County Egg Farm | IN2660883 | NTNCWS | Seymour | 156 | Pulaski County |
| Purina Animal Nutrition, Llc | IN2430101 | NTNCWS | Milford | 30 | Kosciusko County |
| Putnamville Correctional Facility | IN5267005 | CWS | Greencastle | 2,505 | Putnam County |
| Pwi | IN2430239 | NTNCWS | Nappanee | 161 | Kosciusko County |
| Qsi Automation, Inc. | IN2570021 | NTNCWS | Churubusco | 65 | Noble County |
| Queen Road Mobile Home Park | IN5250015 | CWS | Bremen | 32 | Marshall County |
| R & R Engineering Co. Inc | IN2480028 | NTNCWS | Summitville | 44 | Madison County |
| Ramco Supply | IN2250020 | NTNCWS | Rochester | 70 | Fulton County |
| Redkey Water Plant | IN5238008 | CWS | Redkey | 1,323 | Jay County |
| Reelsville Water Company | IN5267006 | CWS | Reelsville | 2,800 | Putnam County |
| Regency Mhp - Regency Estates, Llc | IN5248021 | CWS | New York | 128 | Madison County |
| Regency Pointe Estates Mobile Home Park | IN5243011 | CWS | Pierceton | 345 | Kosciusko County |
| Remington Water Works | IN5237004 | CWS | Remington | 1,182 | Jasper County |
| Renaissance Academy | IN2460005 | NTNCWS | Laporte | 285 | LaPorte County |
| Renegade Rv Plant 1 | IN2200070 | NTNCWS | Bristol | 32 | Elkhart County |
| Renegade Rv Plant 2 | IN2200140 | NTNCWS | Bristol | 35 | Elkhart County |
| Republic Services Of Indiana, Lp | IN2020015 | NTNCWS | Fort Wayne | 135 | Allen County |
| Revol Building Solutions Llc | IN2460858 | NTNCWS | Wanatah | 75 | LaPorte County |
| Reynolds Farm Equipment | IN2290046 | NTNCWS | Russiaville | 80 | Hamilton County |
| Reynolds Water Works | IN5291013 | CWS | Reynolds | 533 | White County |
| Rhinehart Finishing, Llc. | IN2170024 | NTNCWS | Spencerville | 43 | DeKalb County |
| Rhoades Mhp, Llc | IN5285011 | CWS | Englewood | 60 | Wabash County |
| Rhs Water Corporation | IN5253015 | CWS | Bloomington | 870 | Monroe County |
| Richmond Mobile Home Park | IN5289004 | CWS | Indianapolis | 150 | Wayne County |
| Ridgeville Water Department | IN5268008 | CWS | Ridgeville | 825 | Randolph County |
| Rieth-Riley Construction Co, Inc. | IN2710157 | NTNCWS | South Bend | 50 | St. Joseph County |
| Riley Resort Land Trust | IN5243063 | CWS | Pierceton | 39 | Kosciusko County |
| Rise N Roll | IN2440078 | NTNCWS | Middlebury | 660 | LaGrange County |
| Rising Sun Utilities | IN5258002 | CWS | Rising Sun | 2,400 | Ohio County |
| Ritz Charles | IN2290041 | NTNCWS | Carmel | 390 | Hamilton County |
| River Bend Manor Mobile Home Park | IN5256011 | CWS | Roselawn | 44 | Newton County |
| Riverbend Estates | IN5201006 | CWS | Durham | 50 | Adams County |
| Riverside Community | IN5268012 | CWS | Winchester | 50 | Randolph County |
| Roachdale Water Works | IN5267007 | CWS | Roachdale | 980 | Putnam County |
| Roads End Mobile Home Park | IN5252024 | CWS | Peru | 60 | Miami County |
| Roadworks Mfg., Inc. | IN2790017 | NTNCWS | Lafayette | 60 | Tippecanoe County |
| Roanoke Water Works | IN5235009 | CWS | Roanoke | 1,722 | Huntington County |
| Rockland Wood Products | IN2910025 | NTNCWS | Monon | 150 | White County |
| Rockport Water | IN5274007 | CWS | Rockport | 2,520 | Spencer County |
| Rockwell Shores Apartments | IN5245002 | CWS | Cedar Lake | 45 | Lake County |
| Rocky Acres Mobile Home Park | IN5284027 | CWS | Terre Haute | 50 | Vigo County |
| Rolling Prairie Elementary | IN2460036 | NTNCWS | New Carlisle | 570 | LaPorte County |
| Rome City Elementary School | IN2570010 | NTNCWS | Kendallville | 360 | Noble County |
| Rome City Housing Auth. - Warrener Court | IN5257024 | CWS | Rome City | 94 | Noble County |
| Rosedale Water Works | IN5261007 | CWS | Rosedale | 810 | Parke County |
| Rossville Water Works | IN5212007 | CWS | Rossville | 1,653 | Clinton County |
| Rotational Molding Technologies | IN2200928 | NTNCWS | New Paris | 120 | Elkhart County |
| Rotational Molding Technologies- Well #4 | IN2200230 | NTNCWS | New Paris | 120 | Elkhart County |
| Royal Oaks Estates Llc | IN5279016 | CWS | Lafayette | 95 | Tippecanoe County |
| Royal Oaks Homeowners Assn., Inc. | IN5291019 | CWS | Monticello | 390 | White County |
| Rush Shelby Energy County Headquarters | IN2700012 | NTNCWS | Manilla | 46 | Rush County |
| Russellville Water Works | IN5267008 | CWS | Russellville | 405 | Putnam County |
| Rv Dynasty | IN2520033 | NTNCWS | Bunker Hill | 33 | Miami County |
| Rykers Ridge Water Company | IN5239007 | CWS | Madison | 2,050 | Jefferson County |
| Sacred Heart Apostolic School | IN5246006 | CWS | Rolling Prairie | 46 | LaPorte County |
| Safe Way Door, Inc. (Main Plant) | IN2430028 | NTNCWS | Warsaw | 55 | Kosciusko County |
| Salamonie Country Estates | IN5285014 | CWS | Hamilton | 30 | Wabash County |
| Salt Creek Services, Inc. | IN5253006 | CWS | Bloomington | 90 | Monroe County |
| Sandborn Water Department | IN5242011 | CWS | Sandborn | 449 | Knox County |
| Scenic View Mobile Home Community | IN5291020 | CWS | Monticello | 25 | White County |
| Schenkels All-Star Dairy, Llc | IN2350004 | NTNCWS | Huntington | 188 | Huntington County |
| Schneider Water Department | IN5245042 | CWS | Schneider | 267 | Lake County |
| Sdi North Warehouse | IN2170030 | NTNCWS | Butler | 66 | DeKalb County |
| Seeger Jr/Sr High School And Warren Elem | IN2860823 | NTNCWS | Williamsport | 1,005 | Warren County |
| Seymour Midwest Rake | IN2431104 | NTNCWS | Leesburg | 45 | Kosciusko County |
| Seymour Water Plant, Lp | IN5236009 | CWS | Fort Mitchell | 1,560 | Jackson County |
| Shadeland Mobile Home Park | IN5279017 | CWS | Lafayette | 200 | Tippecanoe County |
| Shady Grove Mobile Home Park | IN5246024 | CWS | Valparaiso | 100 | LaPorte County |
| Shady Side Water Corporation | IN5253014 | CWS | Solsberry | 95 | Monroe County |
| Share Foundation | IN5246011 | CWS | Rolling Prairie | 86 | LaPorte County |
| Sharpsville Water Utility | IN5280003 | CWS | Sharpsville | 553 | Tipton County |
| Shawnee Learning Center | IN2230003 | NTNCWS | Rockville | 52 | Fountain County |
| Shelburn Water Utilities | IN5277008 | CWS | Shelburn | 2,500 | Sullivan County |
| Shelbys Landing | IN5273008 | CWS | Shelbyville | 27 | Rush County, Shelby County |
| Shenandoah Elementary | IN2330017 | NTNCWS | New Castle | 550 | Henry County |
| Shenandoah Middle School | IN2330809 | NTNCWS | New Castle | 385 | Henry County |
| Shipshewana Water Works | IN5244006 | CWS | Shipshewana | 703 | LaGrange County |
| Shirley Municipal Water | IN5233013 | CWS | Shirley | 960 | Hancock County, Henry County |
| Shoals Water Company | IN5251007 | CWS | Loogootee | 1,296 | Martin County |
| Shults-Lewis Childrens Home - Well #1 | IN2640872 | NTNCWS | Valparaiso | 40 | Porter County |
| Silver Lake Rv & Mobile Home Estates | IN5276018 | CWS | Pontiac | 272 | Steuben County |
| Silver Lake Water Works | IN5243021 | CWS | Silver Lake | 1,030 | Kosciusko County |
| Sisters Of Providence/St. Mary Of Woods | IN5284020 | CWS | St. Mary Of The Woods | 900 | Vigo County |
| Sisters-St. Francis Perpetual Adoration | IN5271026 | CWS | Mishawaka | 145 | St. Joseph County |
| Sjec Water Works | IN2710189 | NTNCWS | Rolling Prairie | 2,100 | St. Joseph County |
| Skyview Mobile Home Park | IN5220021 | CWS | Priest River | 84 | Elkhart County |
| Slate Automotive | IN2431056 | NTNCWS | Warsaw | 500 | Kosciusko County |
| Smart Cabinetry | IN2200201 | NTNCWS | New Paris | 515 | Elkhart County |
| Smoker Craft Bldg. # 18/26 | IN2200598 | NTNCWS | New Paris | 26 | Elkhart County |
| Smoker Craft Bldg. #11/12 | IN2200591 | NTNCWS | New Paris | 38 | Elkhart County |
| Smoker Craft Bldg. #17 | IN2200597 | NTNCWS | New Paris | 40 | Elkhart County |
| Smoker Craft Bldg. #23 | IN2200596 | NTNCWS | New Paris | 50 | Elkhart County |
| Smoker Craft Bldg. #24 | IN2200593 | NTNCWS | New Paris | 25 | Elkhart County |
| Smoker Craft Bldg. #27 | IN2200594 | NTNCWS | New Paris | 160 | Elkhart County |
| Smoker Craft Bldg. #28/32 | IN2200599 | NTNCWS | New Paris | 100 | Elkhart County |
| Smoker Craft Bldg. #3 | IN2200588 | NTNCWS | New Paris | 30 | Elkhart County |
| Smoker Craft Bldg. #5 | IN2200589 | NTNCWS | New Paris | 80 | Elkhart County |
| South 43 Water Association, Inc. | IN5267009 | CWS | Roachdale | 1,431 | Putnam County |
| South Central Elementary/Jr./Sr. High | IN2460843 | NTNCWS | Union Mills | 1,047 | LaPorte County |
| South Coast Conservancy District | IN5246004 | CWS | North Judson | 2,013 | LaPorte County |
| South Newton Elementary School | IN2560004 | NTNCWS | Kentland | 463 | Newton County |
| South Newton Jr./Sr. High School | IN2560005 | NTNCWS | Kentland | 523 | Newton County |
| South Richland Conservancy District | IN5225004 | CWS | Bremen | 75 | Fulton County, Marshall County |
| South Whitley Municipal Water | IN5292007 | CWS | South Whitley | 1,818 | Whitley County |
| Southeast Fountain County School Corp. | IN2230832 | NTNCWS | Veedersburg | 1,400 | Fountain County |
| Southern Wells Ele And Agri – Well 2B | IN2900821 | NTNCWS | Poneto | 40 | Wells County |
| Southern Wells Jr./Sr. High - Well 1 | IN2900010 | NTNCWS | Poneto | 980 | Wells County |
| Southminster Presbyterian/Loving Hearts | IN2490771 | NTNCWS | Indianapolis | 108 | Marion County |
| Southwest Civic Shareholders Association | IN5234010 | CWS | Russiaville | 55 | Howard County |
| Southwestern Elementary | IN2730830 | NTNCWS | Shelbyville | 450 | Shelby County |
| Southwestern High School | IN2730007 | NTNCWS | Shelbyville | 450 | Shelby County |
| Southwestern Middle School | IN2790008 | NTNCWS | Lafayette | 491 | Tippecanoe County |
| Southwood Elementary School | IN2850838 | NTNCWS | Wabash | 500 | Wabash County |
| Southwood Jr./Sr. High School | IN2850837 | NTNCWS | Wabash | 500 | Wabash County |
| Spear Corporation | IN2670020 | NTNCWS | Roachdale | 26 | Putnam County |
| Specialty Food Group, Llc | IN2640051 | NTNCWS | Valparaiso | 70 | Porter County |
| Spectrum Brands (North) | IN2290891 | NTNCWS | Noblesville | 70 | Hamilton County |
| Spectrum Brands (South) | IN2290892 | NTNCWS | Noblesville | 70 | Hamilton County |
| Speedway 8061 | IN2330886 | NTNCWS | Enon | 1,031 | Henry County |
| Spi Industries - Kando Properties Llc | IN2710064 | NTNCWS | South Bend | 90 | St. Joseph County |
| Spiceland Municipal Water Utility | IN5233016 | CWS | Spiceland | 969 | Henry County |
| Springfield Elementary School | IN2460880 | NTNCWS | Rolling Prairie | 445 | LaPorte County |
| Spurgeon Water Works | IN5263004 | CWS | Spurgeon | 430 | Pike County |
| St Jude Village Water Corporation | IN5221007 | CWS | Connersville | 38 | Fayette County |
| St. Aloysius Catholic School | IN2020843 | NTNCWS | Yoder | 100 | Allen County |
| St. Anthony Memorial Woodland Health Ctr | IN2460021 | NTNCWS | Rolling Prairie | 140 | LaPorte County |
| St. Anthony Water Utility | IN5219010 | CWS | St. Anthony | 1,813 | Dubois County |
| St. Bernice Water Corp. | IN5283010 | CWS | St. Bernice | 750 | Vermillion County |
| St. Henry Water Corporation | IN5219011 | CWS | Ferdinand | 3,293 | Dubois County, Spencer County |
| St. Joe Water Department | IN5217006 | CWS | Waterloo | 460 | DeKalb County |
| St. John Lutheran Church & School | IN2020036 | NTNCWS | Hoagland | 107 | Allen County |
| St. Joseph Hessen Cassel Catholic School | IN2020831 | NTNCWS | Fort Wayne | 416 | Allen County |
| St. Louis Catholic Church & School | IN2020017 | NTNCWS | New Haven | 170 | Allen County |
| St. Malachy Catholic Parish - School | IN2320013 | NTNCWS | Brownsburg | 511 | Hendricks County |
| St. Meinrad Utilities, Inc. | IN5274013 | CWS | St. Meinrad | 658 | Spencer County |
| St. Paul Municipal Water | IN5216004 | CWS | Arlington | 1,096 | Decatur County, Shelby County |
| St. Pauls Childcare | IN2350012 | NTNCWS | Andrews | 100 | Huntington County |
| St. Peter Immanuel Lutheran School | IN2010846 | NTNCWS | Monroeville | 79 | Adams County |
| Starz Academy #1, Inc-Little Starz | IN2710931 | NTNCWS | Osceola | 48 | St. Joseph County |
| Starz Academy #1, Inc. | IN2710804 | NTNCWS | Osceola | 125 | St. Joseph County |
| Staunton Municipal Water | IN5211007 | CWS | Centerpoint | 550 | Clay County |
| Steel Dynamics | IN2170852 | NTNCWS | Butler | 1,000 | DeKalb County |
| Sterno Delivery | IN2460094 | NTNCWS | Laporte | 48 | LaPorte County |
| Steve Reiff, Inc | IN2920027 | NTNCWS | South Whitley | 70 | Whitley County |
| Sti-Bel Mobile Home Park | IN5232028 | CWS | Clayton | 40 | Hendricks County |
| Stoney Creek Estates Mhc, Llc | IN5290003 | CWS | Fishers | 45 | Wells County |
| Stoops Trailer | IN2790042 | NTNCWS | Lafayette | 25 | Tippecanoe County |
| Stroh Church Of Christ/Agape Preschool | IN2760929 | NTNCWS | Hamilton | 440 | Steuben County |
| Suburban Acres Mhp | IN5243024 | CWS | Durham | 333 | Kosciusko County |
| Suburban Court Apartments | IN5273009 | CWS | Shelbyville | 53 | Shelby County |
| Suburban Estates, Llc | IN5229020 | CWS | Noblesville | 350 | Hamilton County |
| Sugar Creek Elementary | IN2540922 | NTNCWS | Crawfordsville | 286 | Montgomery County |
| Sugar Creek Generating Station | IN2840035 | NTNCWS | West Terre Haute | 29 | Vigo County |
| Suite Living Llc | IN2270879 | NTNCWS | Marion | 90 | Grant County |
| Sullivan-Vigo Rural Water Corp. | IN5284021 | CWS | Pimento | 2,765 | Vigo County |
| Sunflower Valley Water Co, Inc. | IN5210012 | CWS | Jeffersonville | 75 | Clark County |
| Sunman Water Works | IN5269005 | CWS | Sunman | 1,058 | Ripley County |
| Sunny Slope Apartments | IN2440931 | NTNCWS | Lagrange | 25 | LaGrange County |
| Sunnymede Community Association Water | IN5202018 | CWS | Fort Wayne | 473 | Allen County |
| Sunnyside Farms | IN2850016 | NTNCWS | Kent | 25 | Wabash County |
| Sunset Harbor Condominiums | IN5245028 | CWS | Cedar Lake | 40 | Lake County |
| Sunset Village & Rv Park | IN5271016 | CWS | South Bend | 25 | St. Joseph County |
| Superior Finish Drinking Water | IN2200920 | NTNCWS | New Paris | 90 | Elkhart County |
| Superior Wood Products | IN2430038 | NTNCWS | Warsaw | 37 | Kosciusko County |
| Swan Lake Golf Resort- Motel/Conference | IN2500861 | NTNCWS | Plymouth | 745 | Marshall County |
| Swanson Center | IN2464101 | NTNCWS | Michigan City | 95 | LaPorte County, St. Joseph County |
| Swayzee Water Utility | IN5227020 | CWS | Swayzee | 975 | Grant County |
| Sweetser Elementary | IN2270804 | NTNCWS | Converse | 350 | Grant County |
| Swift Prepared Foods | IN2200013 | NTNCWS | Elkhart | 350 | Elkhart County |
| Switz City Water Works | IN5228009 | CWS | Bloomington | 888 | Greene County |
| Syracuse Water Company | IN5243025 | CWS | Syracuse | 2,810 | Elkhart County, Kosciusko County |
| Taghleef Industries, Inc. | IN2840017 | NTNCWS | Rosedale | 399 | Vigo County |
| Talbert Mfg., Inc. | IN2370834 | NTNCWS | Rensselaer | 150 | Jasper County |
| Tall Oaks Mobile Home Park | IN5220035 | CWS | Winamac | 60 | Elkhart County |
| Tall Timbers Mobile Home Park | IN5229012 | CWS | Lincoln | 90 | Hamilton County |
| Tara Treatment Center, Inc. | IN2410951 | NTNCWS | Franklin | 55 | Johnson County |
| Taylor Community School Corporation | IN2340011 | NTNCWS | Kokomo | 833 | Howard County |
| Tdc Trailer | IN2370103 | NTNCWS | Rensselaer | 74 | Jasper County |
| Tecomet: Twd | IN2430303 | NTNCWS | Warsaw | 72 | Kosciusko County |
| Tecomet: Twi-1 | IN2431068 | NTNCWS | Warsaw | 149 | Kosciusko County |
| Ten Oaks Mhp | IN5256008 | CWS | Lake Village | 270 | Newton County |
| Tender Loving Care Center | IN2500054 | NTNCWS | Bremen | 25 | Marshall County |
| Terra Drive Systems, Inc. | IN2910902 | NTNCWS | Brookston | 90 | White County |
| Terrace Hills Mhc | IN5212010 | CWS | Frankfort | 26 | Clinton County |
| Tewell Corp./Angola 76 Travelers Mall | IN2760843 | NTNCWS | Hubbard | 850 | Steuben County |
| Texmo Precision Castings | IN2430013 | NTNCWS | Warsaw | 40 | Kosciusko County |
| The Andersons Renewables, Llc | IN2090007 | NTNCWS | Logansport | 75 | Cass County |
| The Andersons, Inc. - Walton Facility | IN2090024 | NTNCWS | Galveston | 40 | Cass County |
| The Crossing High School – Frankfort | IN2120006 | NTNCWS | Frankfort | 75 | Clinton County |
| The Hills At St. Joe Farm | IN5271002 | CWS | Granger | 25 | St. Joseph County |
| The Landings Homeowners Association | IN5208004 | CWS | Monticello | 159 | Carroll County |
| The Nfluence Network, Inc. | IN2710114 | NTNCWS | Granger | 230 | St. Joseph County |
| The Oaks Of Kokomo | IN5234001 | CWS | Zionsville | 150 | Howard County |
| The Waters Of Dunkirk | IN2380807 | NTNCWS | Dunkirk | 75 | Jay County |
| The Waters Of Lebanon | IN2060813 | NTNCWS | Lebanon | 129 | Boone County |
| Thermo Dyne | IN2200943 | NTNCWS | Elkhart | 47 | Elkhart County |
| Thorntown Utilities | IN5206005 | CWS | Thorntown | 1,600 | Boone County |
| Timberbrook Mobile Home Park | IN5220027 | CWS | Cincinnati | 1,418 | Elkhart County |
| Timbernest Townhouses | IN5234014 | CWS | Russiaville | 175 | Howard County |
| Tippecanoe Valley High School | IN2431093 | NTNCWS | Akron | 611 | Kosciusko County |
| Tippecanoe Valley Middle School | IN2431092 | NTNCWS | Akron | 474 | Kosciusko County |
| Tippy Bend Mobile Home Park | IN5225005 | CWS | Rochester | 40 | Fulton County |
| Tipton West Water Treatment Plant | IN2800010 | NTNCWS | Tipton | 200 | Tipton County |
| Topeka Water Department | IN5244008 | CWS | Topeka | 1,178 | LaGrange County |
| Toppan Packaging Usa | IN2410919 | NTNCWS | Edinburgh | 165 | Johnson County |
| Town Of Fillmore Utilities | IN5267012 | CWS | Fillmore | 510 | Putnam County |
| Town Of Lizton Water Utility | IN5232026 | CWS | Lizton | 488 | Hendricks County |
| Trafalgar Water Department | IN5241014 | CWS | Nashville | 1,490 | Johnson County |
| Trailer Transit, Inc. | IN2640111 | NTNCWS | Porter | 34 | Porter County |
| Trails Edge Apts | IN5284022 | CWS | Terre Haute | 260 | Vigo County |
| Tranter Graphics, Inc. | IN2430032 | NTNCWS | Syracuse | 75 | Kosciusko County |
| Tri Eagle Provisions Llc | IN2250014 | NTNCWS | Tippecanoe | 44 | Fulton County |
| Tri Star Glove | IN2140011 | NTNCWS | Plainville | 45 | Daviess County |
| Tri-Central Elementary School | IN2800815 | NTNCWS | Sharpsville | 435 | Tipton County |
| Tri-Central High School | IN2800814 | NTNCWS | Sharpsville | 435 | Tipton County |
| Tri-County Conservancy District | IN5255022 | CWS | Camby | 3,078 | Hendricks County, Morgan County |
| Tri-County High School | IN2910808 | NTNCWS | Wolcott | 440 | White County |
| Tri-Wall/International Paper | IN2170807 | NTNCWS | Butler | 135 | DeKalb County |
| Trinity Lutheran School | IN2201110 | NTNCWS | Elkhart | 1,160 | Elkhart County |
| Troy Township Water Association | IN5262006 | CWS | Tell City | 700 | Perry County |
| Troy Water Utility | IN5262005 | CWS | Troy | 1,223 | Perry County |
| Troyers Market | IN2010070 | NTNCWS | Berne | 90 | Adams County |
| Truck Accessories Group, Llc. | IN2200948 | NTNCWS | Elkhart | 100 | Elkhart County |
| Truck Accessories Group, Llc. Mp #1 | IN2200945 | NTNCWS | Elkhart | 180 | Elkhart County |
| Truck Accessories Group, Llc. Mp #2 | IN2200946 | NTNCWS | Elkhart | 50 | Elkhart County |
| Truck Country - Stoops Freightliner | IN2761001 | NTNCWS | Fremont | 32 | Steuben County |
| Truland Equipment, Llc | IN2900024 | NTNCWS | Bluffton | 148 | Wells County |
| Turkey Creek Regional Sewer District | IN5243032 | CWS | Cromwell | 593 | Kosciusko County |
| Turtle Top (Plant #1) | IN2201080 | NTNCWS | New Paris | 100 | Elkhart County |
| Turtle Top (Plant #2) | IN2201079 | NTNCWS | New Paris | 75 | Elkhart County |
| U.S. Cargo | IN2201097 | NTNCWS | Mishawaka | 119 | Elkhart County |
| Ufp Granger, Llc Treating Plant | IN2710078 | NTNCWS | Grand Rapids | 30 | St. Joseph County |
| Umh In Broadmore, Llc Aka Broadmore Esta | IN5220012 | CWS | Morgantown | 972 | Elkhart County |
| Unifrax Corporation Dba Alkegen | IN2710866 | NTNCWS | New Carlisle | 165 | St. Joseph County |
| Union Center Christian School | IN2200046 | NTNCWS | Nappanee | 50 | Elkhart County |
| Union Center Church - Brethren | IN2200467 | NTNCWS | Nappanee | 135 | Elkhart County |
| United Animal Health | IN2290055 | NTNCWS | Sheridan | 42 | Hamilton County |
| United Trailers, Inc. | IN2200073 | NTNCWS | Bristol | 45 | Elkhart County |
| Universal Forest Products - Mill | IN2710077 | NTNCWS | Grand Rapids | 210 | St. Joseph County |
| Universal Water Works | IN5283011 | CWS | Centerpoint | 473 | Vermillion County |
| University Of Chicago Medicine | IN2450081 | NTNCWS | Chicago | 320 | Lake County |
| Vacuplast Llc Dba Ls Manufacturing | IN2200165 | NTNCWS | Elkhart | 25 | Elkhart County |
| Valley Screen Process Company | IN2710863 | NTNCWS | Mishawaka | 49 | St. Joseph County |
| Valley View Estates | IN5235014 | CWS | Durham | 80 | Huntington County |
| Valley View Mobile Home Park | IN5291005 | CWS | Ojai | 50 | White County |
| Van Bibber Lake Conservancy District | IN5267010 | CWS | Greencastle | 830 | Putnam County |
| Van Buren Municipal Utilities | IN5227023 | CWS | Van Buren | 864 | Grant County |
| Vanair Manufacturing | IN2460081 | NTNCWS | Michigan City | 90 | LaPorte County |
| Veada Industries, Inc. (Building #7) | IN2200012 | NTNCWS | New Paris | 144 | Elkhart County |
| Veada Industries, Inc.- Office #1 | IN2200935 | NTNCWS | New Paris | 86 | Elkhart County |
| Veada Industries, Inc/Dips & Dogs | IN2200564 | NTNCWS | New Paris | 79 | Elkhart County |
| Veedersburg Municipal Water Supply | IN5223005 | CWS | Wingate | 2,299 | Fountain County |
| Veldmans Auto Parts, Inc. | IN2710173 | NTNCWS | South Bend | 40 | St. Joseph County |
| Vermillion Rise Mega Park | IN5283014 | CWS | Hillsdale | 135 | Vermillion County |
| Vernon Water Department | IN5240009 | CWS | Vernon | 538 | Jennings County |
| Versailles Water Works | IN5269006 | CWS | Holton | 2,200 | Ripley County |
| Vevay Water Department | IN5278002 | CWS | Vevay | 1,950 | Switzerland County |
| Victory Christian Academy | IN2640052 | NTNCWS | Valparaiso | 200 | Porter County |
| Village Green Mobile Home Park | IN5234009 | CWS | Indianapolis | 102 | Howard County |
| Vulcraft | IN2170831 | NTNCWS | St. Joe | 281 | DeKalb County |
| Wabash Valley Landfill | IN2850022 | NTNCWS | Wabash | 90 | Wabash County |
| Waelz Sustainable Products, Llc | IN2090020 | NTNCWS | Logansport | 95 | Cass County |
| Wainwright Middle School | IN2790010 | NTNCWS | Lafayette | 340 | Tippecanoe County |
| Wakarusa Water Works | IN5220029 | CWS | Wakarusa | 1,998 | Elkhart County |
| Waldron Conservancy District | IN5273006 | CWS | Waldron | 800 | Shelby County |
| Walnut Elementary School | IN2540005 | NTNCWS | Crawfordsville | 200 | Montgomery County |
| Walton Water Works | IN5209010 | CWS | Walton | 1,040 | Cass County |
| Wanatah Water Utility | IN5246033 | CWS | Wanatah | 1,050 | LaPorte County |
| Warsaw Chemical | IN2431045 | NTNCWS | Warsaw | 180 | Kosciusko County |
| Waterloo Water Works | IN5217007 | CWS | Hamilton | 2,242 | DeKalb County |
| Waubee Lake Mobile Home Park | IN5243031 | CWS | Milford | 30 | Kosciusko County |
| Wawasee Middle School | IN2430942 | NTNCWS | Syracuse | 588 | Kosciusko County |
| Wayne Center Elementary School | IN2570057 | NTNCWS | Kendallville | 400 | Noble County |
| Wayne County Highway Dept. | IN2890832 | NTNCWS | Centerville | 34 | Wayne County |
| Wayne Manufacturing Corp. | IN2170019 | NTNCWS | Laotto | 90 | DeKalb County |
| Waynetown Water Works | IN5254013 | CWS | Waynetown | 953 | Montgomery County |
| Waypoint Community Church & Daycare | IN2200211 | NTNCWS | Goshen | 551 | Elkhart County |
| Webster Estates | IN5243015 | CWS | Hamilton | 122 | Kosciusko County |
| Wells Homeowners Association, Inc. | IN5252009 | CWS | Kokomo | 98 | Miami County |
| Wes Del High School | IN2180895 | NTNCWS | Gaston | 327 | Delaware County |
| Wes Del Middle School | IN2180896 | NTNCWS | Gaston | 264 | Delaware County |
| West Central Elementary | IN2660879 | NTNCWS | Francesville | 400 | Pulaski County |
| West Central Middle & High School | IN2660854 | NTNCWS | Francesville | 389 | Pulaski County |
| West Lebanon Water Works | IN5286003 | CWS | West Lebanon | 723 | Warren County |
| Western Boone Schools | IN2060808 | NTNCWS | Thorntown | 876 | Boone County |
| Western Estates Mobile Home Park | IN5234002 | CWS | Indianapolis | 248 | Howard County |
| Western School Corporation | IN2340837 | NTNCWS | Russiaville | 3,010 | Howard County |
| Westhaven Mhp Llc | IN5243028 | CWS | Englewood | 417 | Kosciusko County |
| Westport Water Company | IN5216005 | CWS | Westport | 1,725 | Decatur County |
| Westport Water Company - Cougar Road | IN2160002 | NTNCWS | Westport | 933 | Decatur County |
| Westrock | IN2750045 | NTNCWS | Knox | 35 | Starke County |
| Westside Properties Llc | IN2640330 | NTNCWS | Crown Point | 30 | Porter County |
| Westside Properties Llc | IN2640334 | NTNCWS | Crown Point | 33 | Porter County |
| Westview Elementary School | IN2440987 | NTNCWS | Topeka | 398 | LaGrange County |
| Westview Jr./Sr. High School | IN2440815 | NTNCWS | Topeka | 788 | LaGrange County |
| Westville Correctional Facility | IN5246001 | CWS | Westville | 2,850 | LaPorte County |
| Westville Water Department | IN5246029 | CWS | Westville | 1,800 | LaPorte County |
| Westwood Elementary School | IN2330019 | NTNCWS | New Castle | 258 | Henry County |
| Westwood Lumber Sales, Inc. | IN2020074 | NTNCWS | New Haven | 40 | Allen County |
| Wheatfield Elementary School | IN2370006 | NTNCWS | Wheatfield | 457 | Jasper County |
| Wheatland Water Works | IN5242016 | CWS | Wheatland | 474 | Knox County |
| White County Egg Farm | IN2910967 | NTNCWS | Seymour | 55 | White County |
| Whitko Career Academy | IN2920874 | NTNCWS | Larwill | 570 | Whitley County |
| Wible Lumber, Inc. | IN2440040 | NTNCWS | South Milford | 46 | LaGrange County |
| Wildcat Highlands | IN5279026 | CWS | Chalmers | 360 | Tippecanoe County |
| Wilfred Water Corporation | IN5277010 | CWS | Shelburn | 400 | Sullivan County |
| Williamsport Water Utility | IN5286004 | CWS | Williamsport | 1,800 | Warren County |
| Willow Creek Community | IN5234012 | CWS | Minden | 30 | Howard County |
| Willow Creek Crossing | IN5246009 | CWS | Elmhurst | 34 | LaPorte County |
| Willow Springs Mhp | IN5252010 | CWS | Greenfield | 25 | Miami County |
| Winamac Municipal Utilities | IN5266005 | CWS | Winamac | 2,400 | Pulaski County |
| Windfall Water Department | IN5280005 | CWS | Greenwood | 708 | Tipton County |
| Windstar Park Inc. | IN5243047 | CWS | Claypool | 44 | Kosciusko County |
| Winfield Elementary School | IN2450012 | NTNCWS | Crown Point | 546 | Lake County |
| Wingate Water Works | IN5254014 | CWS | Roachdale | 299 | Montgomery County |
| Winslow Water Works | IN5263006 | CWS | Winslow | 1,010 | Pike County |
| Wolcott Water Works | IN5291015 | CWS | Wolcott | 1,001 | White County |
| Wolcottville Water Works | IN5244010 | CWS | Hamilton | 1,035 | LaGrange County, Noble County |
| Wolf Lake Elementary School | IN2570011 | NTNCWS | Albion | 278 | Noble County |
| Woodburn Christian Childrens Home | IN2020853 | NTNCWS | Woodburn | 27 | Allen County |
| Woodburn Water Works | IN5202024 | CWS | Woodburn | 1,609 | Allen County |
| Woodland Hills Mobile Home Park #1 | IN5252008 | CWS | Cincinnati | 100 | Miami County |
| Woodland Hills Mobile Home Park #2 | IN5252017 | CWS | Cincinnati | 168 | Miami County |
| Woodland Village Mobile Home Park | IN5273007 | CWS | Shelbyville | 58 | Shelby County |
| Woodview Mobile Home Park | IN5289014 | CWS | Milton | 100 | Wayne County |
| World Gospel Mission | IN2270332 | NTNCWS | Marion | 80 | Grant County |
| World Missionary Press | IN2200595 | NTNCWS | New Paris | 80 | Elkhart County |
| Wyneken Memorial Lutheran School | IN2010016 | NTNCWS | Decatur | 230 | Adams County |
| X Y Tool & Die, Inc. | IN2170002 | NTNCWS | Laotto | 74 | DeKalb County |
| Xpo Logistics Freight Inc. Xcw | IN2760063 | NTNCWS | Ann Arbor | 235 | Steuben County |
| Yellow Creek Mennonite Church | IN2200430 | NTNCWS | Goshen | 381 | Elkhart County |
| York Elementary School | IN2200190 | NTNCWS | Middlebury | 285 | Elkhart County |
| Zimmer Biomet, Inc. - Building A | IN2430004 | NTNCWS | Warsaw | 912 | Kosciusko County |
| Zimmer Biomet, Inc. - Building E | IN2430087 | NTNCWS | Warsaw | 88 | Kosciusko County |
| Zion Lutheran School | IN2300823 | NTNCWS | New Palestine | 330 | Hancock County |
| Zionsville Mhp Trust | IN5206002 | CWS | Zionsville | 57 | Boone County |
| Zotung Christian Church | IN2410002 | NTNCWS | Franklin | 194 | Johnson County |