Systems reaching a study comparison level
2.9%6 of 208 active community water systems with complete monitoring
All 208 systems had complete monitoring. 6 reached at least one study comparison level; 202 did not. “Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. It does not determine household exposure, health risk, or current legal compliance.
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Find your water system
ZIP codes are used only to route visitors to public water systems that reported serving them. Confirm the actual provider using a water bill or utility record.
Compound summary
System counts in Indiana
Each count shows how many included water systems reached the named study level.
| Study comparison | Systems reaching level | Water systems included | Percent |
|---|---|---|---|
| PFOA: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 5 | 208 | 2.4% |
| PFOS: study level 4.05 ppt (April 2024 EPA level: 4 ppt) | 2 | 208 | 1.0% |
| PFHxS: study level 15 ppt (April 2024 EPA level: 10 ppt) | 1 | 208 | 0.5% |
| PFNA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 208 | 0.0% |
| HFPO-DA: study level 15 ppt (April 2024 EPA level: 10 ppt) | 0 | 208 | 0.0% |
| Hazard Index: study level 1.5 with at least two detected components (April 2024 EPA level: 1) | 1 | 208 | 0.5% |
System directory
Community water systems with complete monitoring
Each PWSID appears once, preventing double counting across ZIP associations.
| Public water system | PWSID | Population served | Primary source | Sampling locations | Study comparison |
|---|---|---|---|---|---|
| ABERDEEN PATE WATER COMPANY, INC. | IN5258001 | 4,787 | Ground water | 1 | Below the study levels |
| ALEXANDRIA WATER DEPARTMENT | IN5248001 | 5,149 | Ground water | 1 | Below the study levels |
| ANDERSON WATER DEPARTMENT | IN5248002 | 55,212 | Groundwater under influence of surface water | 2 | Below the study levels |
| ANGOLA WATER DEPARTMENT | IN5276001 | 9,340 | Ground water | 2 | Below the study levels |
| APPLE VALLEY UTILITIES, INC. | IN5245001 | 712 | Ground water | 2 | Below the study levels |
| AUBURN WATER DEPARTMENT | IN5217001 | 12,800 | Ground water | 2 | Below the study levels |
| B&B WATER PROJECT, INC. | IN5253001 | 4,695 | Surface water purchased | 1 | Below the study levels |
| BARGERSVILLE WATER DEPARTMENT | IN5241001 | 34,418 | Ground water | 2 | Below the study levels |
| BATESVILLE WATER UTILITY | IN5269001 | 7,323 | Surface water | 2 | Below the study levels |
| BBP WATER COMPANY | IN5260001 | 9,903 | Ground water | 2 | Below the study levels |
| BEDFORD CITY UTILITIES | IN5247001 | 14,000 | Surface water | 1 | Below the study levels |
| BERNE WATER DEPARTMENT | IN5201001 | 4,388 | Ground water | 1 | Below the study levels |
| BICKNELL MUNICIPAL UTILITIES | IN5242001 | 4,064 | Ground water | 1 | Below the study levels |
| BLUFFTON UTILITIES WATER DEPT | IN5290001 | 10,298 | Ground water | 1 | Below the study levels |
| BORDEN TRI-COUNTY REGION | IN5210002 | 11,000 | Surface water | 2 | Below the study levels |
| BRAZIL CITY WATER WORKS | IN5211001 | 12,000 | Ground water | 1 | Below the study levels |
| BREMEN WATER DEPARTMENT | IN5250003 | 4,516 | Ground water | 2 | Below the study levels |
| BROWN COUNTY WATER UTILITY | IN5207001 | 15,368 | Ground water | 4 | Reached a study level |
| BROWNSBURG WATER WORKS | IN5232002 | 31,250 | Surface water purchased | 3 | Below the study levels |
| CAMP ATTERBURY | IN5241015 | 5,300 | Ground water purchased | 1 | Below the study levels |
| CARMEL WATER DEPARTMENT | IN5229004 | 99,927 | Groundwater under influence of surface water | 4 | Below the study levels |
| CEDAR LAKE WATER WORKS | IN5245047 | 4,600 | Ground water | 2 | Below the study levels |
| CHANDLER WATER WORKS DEPARTMENT | IN5287002 | 20,120 | Ground water | 1 | Below the study levels |
| CICERO WATER DEPARTMENT | IN5229005 | 5,607 | Ground water | 1 | Below the study levels |
| CITIZENS WATER - INDIANAPOLIS | IN5249004 | 880,345 | Surface water | 9 | Below the study levels |
| CITIZENS WATER - MORGAN | IN5255019 | 5,705 | Ground water purchased | 1 | Below the study levels |
| CITIZENS WATER OF WESTFIELD, LLC | IN5229009 | 61,493 | Ground water | 3 | Below the study levels |
| CITY OF BLOOMINGTON UTILITIES | IN5253002 | 83,000 | Surface water | 1 | Below the study levels |
| CITY OF GREENDALE UTILITIES | IN5215003 | 5,092 | Ground water | 1 | Below the study levels |
| CITY OF LAWRENCE UTILITIES | IN5249005 | 49,000 | Ground water | 3 | Below the study levels |
| CLINTON WATER UTILITY | IN5283004 | 4,773 | Ground water | 1 | Below the study levels |
| COLUMBIA CITY WATER DEPARTMENT | IN5292004 | 9,892 | Ground water | 1 | Below the study levels |
| COLUMBUS MUNICIPAL UTILITY | IN5203002 | 51,122 | Ground water | 2 | Below the study levels |
| CONNERSVILLE UTILITIES | IN5221001 | 13,282 | Ground water | 2 | Below the study levels |
| CORDRY SWEETWATER CONSERVANCY DISTRICT | IN5207004 | 3,425 | Ground water purchased | 1 | Below the study levels |
| CORYDON WATER WORKS | IN5231001 | 5,716 | Ground water | 1 | Below the study levels |
| CROWN POINT WATER WORKS | IN5245008 | 30,000 | Surface water purchased | 1 | Below the study levels |
| DANVILLE WATER WORKS | IN5232004 | 10,500 | Surface water purchased | 3 | Below the study levels |
| DAVIESS COUNTY RURAL WATER | IN5214002 | 7,969 | Ground water purchased | 3 | Below the study levels |
| DECATUR WATER DEPARTMENT | IN5201002 | 9,900 | Ground water | 2 | Below the study levels |
| DUBOIS WATER UTILITIES | IN5219002 | 9,078 | Surface water purchased | 2 | Below the study levels |
| DYER WATER DEPARTMENT | IN5245011 | 16,800 | Surface water purchased | 1 | Below the study levels |
| EAST CHICAGO WATER WORKS | IN5245012 | 26,370 | Surface water | 1 | Below the study levels |
| EAST FORK WATER | IN5251004 | 3,485 | Ground water | 2 | Below the study levels |
| EAST WASHINGTON RURAL WATER | IN5288002 | 8,613 | Surface water purchased | 1 | Below the study levels |
| EASTERN BARTHOLOMEW WATER | IN5203004 | 13,547 | Ground water | 1 | Below the study levels |
| EASTERN HEIGHTS UTILITIES | IN5228003 | 19,028 | Ground water | 3 | Below the study levels |
| EDINBURGH WATER UTILITY | IN5241002 | 4,480 | Ground water | 1 | Below the study levels |
| EDWARDSVILLE WATER CORPORATION | IN5222001 | 10,442 | Ground water | 1 | Below the study levels |
| ELKHART PUBLIC WORKS AND UTILITIES | IN5220008 | 46,455 | Ground water | 3 | Below the study levels |
| ELLETTSVILLE WATER WORKS | IN5253004 | 14,500 | Surface water purchased | 1 | Below the study levels |
| ELWOOD WATER & SEWAGE | IN5248007 | 8,586 | Ground water | 2 | Below the study levels |
| EVANSVILLE WATER UTILITY | IN5282002 | 182,444 | Surface water | 1 | Below the study levels |
| FAIRVIEW PARK WATER UTILITIES | IN5283006 | 1,386 | Ground water | 1 | Below the study levels |
| FAYETTE TOWNSHIP WATER ASSN. | IN5284002 | 2,000 | Ground water | 1 | Below the study levels |
| FINCH NEWTON WATER, INC. | IN5274003 | 2,672 | Surface water purchased | 2 | Below the study levels |
| FLOYDS KNOBS WATER COMPANY, INC. | IN5222002 | 6,690 | Ground water purchased | 2 | Below the study levels |
| FORT BRANCH WATER DEPARTMENT | IN5226001 | 4,020 | Ground water | 1 | Below the study levels |
| FORT WAYNE - 3 RIVERS FILTRATION PLANT | IN5202020 | 269,994 | Surface water | 1 | Below the study levels |
| FORTVILLE WATER WORKS | IN5230003 | 7,638 | Ground water | 1 | Below the study levels |
| FRANKFORT WATER WORKS | IN5212003 | 16,422 | Ground water | 1 | Below the study levels |
| FRANKLIN COUNTY WATER ASSOCIATION | IN5224002 | 8,200 | Ground water | 2 | Below the study levels |
| GALVESTON WATER WORKS | IN5209003 | 1,258 | Ground water | 1 | Below the study levels |
| GARRETT WATER UTILITY | IN5217004 | 6,390 | Ground water | 1 | Below the study levels |
| GAS CITY WATER DEPARTMENT | IN5227006 | 6,000 | Ground water | 2 | Below the study levels |
| GERMAN TOWNSHIP WATER DISTRICT INC. | IN5282003 | 12,890 | Surface water purchased | 1 | Below the study levels |
| GIBSON WATER, INC. | IN5226009 | 4,835 | Surface water purchased | 1 | Below the study levels |
| GOSHEN WATER UTILITY | IN5220009 | 32,267 | Ground water | 2 | Below the study levels |
| GREENCASTLE DEPARTMENT OF WATER | IN5267004 | 12,699 | Groundwater under influence of surface water | 1 | Below the study levels |
| GREENFIELD WATER UTILITY | IN5230004 | 26,671 | Ground water | 2 | Below the study levels |
| GREENSBURG MUNICIPAL WATER WORKS | IN5216002 | 12,650 | Surface water | 1 | Below the study levels |
| GREENVILLE WATER UTILITY | IN5222004 | 4,920 | Ground water purchased | 3 | Below the study levels |
| GRIFFITH WATER DEPARTMENT | IN5245019 | 16,893 | Surface water purchased | 1 | Below the study levels |
| HAMMOND WATER WORKS DEPARTMENT | IN5245020 | 78,384 | Surface water | 1 | Below the study levels |
| HANOVER WATER DEPARTMENT | IN5239003 | 2,597 | Ground water purchased | 1 | Below the study levels |
| HEBRON WATER DEPARTMENT | IN5264009 | 3,724 | Ground water | 1 | Below the study levels |
| HIGHLAND WATER WORKS | IN5245021 | 23,984 | Surface water purchased | 1 | Below the study levels |
| HILL WATER CORPORATION | IN5255021 | 8,200 | Ground water | 1 | Below the study levels |
| HUNTERTOWN WATER WORKS | IN5202007 | 14,058 | Ground water | 1 | Below the study levels |
| HUNTINGTON WATER DEPARTMENT | IN5235005 | 17,300 | Ground water | 2 | Below the study levels |
| IN American Water - Lowell | IN5245029 | 11,908 | Groundwater under influence of surface water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - CHARLESTOWN | IN5210003 | 8,658 | Ground water | 1 | Reached a study level |
| INDIANA AMERICAN WATER - CRAWFORDSVILLE | IN5254005 | 15,930 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - GEORGETOWN | IN5222003 | 3,605 | Ground water purchased | 1 | Below the study levels |
| INDIANA AMERICAN WATER - JOHNSON COUNTY | IN5241005 | 86,813 | Ground water | 3 | Below the study levels |
| INDIANA AMERICAN WATER - KOKOMO | IN5234007 | 59,313 | Surface water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - MOORESVILLE | IN5255006 | 10,083 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - MUNCIE | IN5218012 | 74,030 | Surface water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - NEWBURGH | IN5287004 | 22,215 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - NOBLESVILLE | IN5229015 | 45,575 | Ground water | 3 | Below the study levels |
| INDIANA AMERICAN WATER - NORTHWEST | IN5245015 | 210,510 | Surface water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - RICHMOND | IN5289012 | 41,485 | Surface water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - S. INDIANA | IN5210005 | 104,445 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - SEYMOUR | IN5236005 | 20,725 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - SHELBYVILLE | IN5273002 | 19,093 | Ground water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - SULLIVAN | IN5277009 | 6,598 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - TERRE HAUTE | IN5284012 | 67,765 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - WABASH | IN5285003 | 12,140 | Ground water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - WARSAW | IN5243030 | 13,835 | Ground water | 1 | Below the study levels |
| INDIANA AMERICAN WATER - WEST LAFAYETTE | IN5279020 | 35,533 | Ground water | 2 | Below the study levels |
| INDIANA AMERICAN WATER - WINCHESTER | IN5268003 | 5,405 | Ground water | 1 | Below the study levels |
| INGALLS WATER COMPANY | IN5248012 | 7,600 | Ground water | 1 | Below the study levels |
| IRELAND UTILITIES, INC. | IN5219008 | 4,395 | Surface water purchased | 2 | Below the study levels |
| JACKSON COUNTY WATER UTILITY | IN5236003 | 13,667 | Ground water | 1 | Below the study levels |
| JASONVILLE WATER DEPARTMENT | IN5228004 | 3,660 | Ground water | 1 | Below the study levels |
| JASPER MUNICIPAL WATER UTILITY | IN5219009 | 17,440 | Surface water | 1 | Below the study levels |
| JENNINGS WATER, INC. | IN5240006 | 8,370 | Ground water | 1 | Below the study levels |
| KENDALLVILLE WATER DEPARTMENT | IN5257008 | 10,300 | Ground water | 3 | Below the study levels |
| KENT WATER COMPANY | IN5239004 | 6,750 | Ground water | 1 | Below the study levels |
| KNOX WATER WORKS | IN5275002 | 3,700 | Ground water | 1 | Below the study levels |
| L-M-S CONSERVANCY DISTRICT | IN5215007 | 5,375 | Ground water | 1 | Below the study levels |
| LAFAYETTE WATER WORKS, IN | IN5279013 | 70,835 | Ground water | 2 | Below the study levels |
| LAPORTE WATER WORKS | IN5246017 | 22,197 | Ground water | 2 | Below the study levels |
| LAWRENCEBURG MUNICIPAL UTILITIES | IN5215006 | 5,000 | Ground water | 1 | Below the study levels |
| LEBANON UTILITIES | IN5206003 | 16,840 | Ground water | 2 | Below the study levels |
| LIGONIER WATER WORKS | IN5257010 | 4,405 | Ground water | 1 | Below the study levels |
| LINTON MUNICIPAL WATER UTILITY | IN5228005 | 7,430 | Ground water | 1 | Below the study levels |
| LOGANSPORT MUNICIPAL UTILITY-WELL FIELD | IN5209012 | 18,369 | Ground water | 1 | Below the study levels |
| LOOGOOTEE WATER WORKS | IN5251005 | 2,800 | Ground water | 1 | Below the study levels |
| MADISON WATER DEPARTMENT, IN | IN5239006 | 15,323 | Ground water | 3 | Below the study levels |
| MARION CITY WATER WORKS | IN5227014 | 28,363 | Ground water | 1 | Below the study levels |
| MARTINSVILLE WATER UTILITY | IN5255009 | 15,000 | Ground water | 1 | Below the study levels |
| MARYSVILLE OTISCO NABB WATER CORP. | IN5210006 | 6,813 | Ground water purchased | 2 | Reached a study level |
| MICHIGAN CITY DEPARTMENT OF WATER WORKS | IN5246020 | 33,996 | Surface water | 1 | Below the study levels |
| MIDDLEBURY WATER DEPARTMENT | IN5220014 | 3,420 | Ground water | 1 | Below the study levels |
| MISHAWAKA UTILITIES | IN5271009 | 49,675 | Ground water | 4 | Below the study levels |
| MITCHELL WATER DEPARTMENT | IN5247003 | 5,000 | Ground water | 1 | Below the study levels |
| MONTICELLO WATER WORKS | IN5291011 | 5,300 | Ground water | 1 | Below the study levels |
| MORGAN COUNTY RURAL WATER COMPANY | IN5255010 | 8,800 | Ground water | 2 | Below the study levels |
| MOUNT VERNON WATER WORKS | IN5265006 | 6,426 | Surface water | 1 | Below the study levels |
| MUNSTER WATER COMPANY | IN5245031 | 23,894 | Surface water purchased | 1 | Below the study levels |
| NAPOLEON COMMUNITY RURAL WATER CORP. | IN5269007 | 5,564 | Surface water purchased | 1 | Below the study levels |
| NAPPANEE WATER UTILITY | IN5220016 | 6,800 | Ground water | 1 | Below the study levels |
| NASHVILLE WATER DEPARTMENT | IN5207002 | 3,315 | Surface water purchased | 2 | Below the study levels |
| NAVAL SUPPORT ACTIVITY, CRANE | IN5251003 | 6,538 | Surface water | 1 | Below the study levels |
| NEW CASTLE UTILITIES | IN5233011 | 19,880 | Ground water | 1 | Below the study levels |
| NEW CHICAGO WATER WORKS | IN5245032 | 5,500 | Surface water purchased | 1 | Below the study levels |
| NEW HAVEN WATER DEPARTMENT | IN5202009 | 15,700 | Surface water purchased | 1 | Below the study levels |
| NEW PEKIN WATER UTILITY | IN5288004 | 2,150 | Surface water purchased | 1 | Below the study levels |
| NORTH DEARBORN WATER CORPORATION | IN5215008 | 5,775 | Ground water | 5 | Below the study levels |
| NORTH LAWRENCE WATER AUTHORITY | IN5247004 | 11,625 | Surface water purchased | 2 | Below the study levels |
| NORTH MANCHESTER WATER DEPARTMENT | IN5285009 | 6,100 | Ground water | 1 | Below the study levels |
| NORTH VERNON WATER DEPARTMENT | IN5240008 | 6,500 | Surface water | 1 | Below the study levels |
| NORTHWEST JASPER REGIONAL WATER DISTRICT | IN5237015 | 4,054 | Ground water | 2 | Below the study levels |
| PALMYRA WATER WORKS | IN5231004 | 4,425 | Ground water purchased | 1 | Below the study levels |
| PAOLI WATER DEPARTMENT | IN5259004 | 3,677 | Surface water purchased | 1 | Below the study levels |
| PATOKA LAKE REGIONAL WATER | IN5219012 | 13,503 | Surface water | 1 | Below the study levels |
| PATRIOT WATER DEPARTMENT | IN5278001 | 11,937 | Ground water | 2 | Below the study levels |
| PENDLETON WATER COMPANY | IN5248019 | 5,758 | Ground water | 2 | Below the study levels |
| PERU WATER DEPARTMENT | IN5252016 | 11,417 | Ground water | 1 | Below the study levels |
| PETERSBURG WATER COMPANY | IN5263002 | 4,018 | Ground water | 1 | Below the study levels |
| PIKE-GIBSON WATER, INC. | IN5263003 | 10,000 | Surface water purchased | 3 | Below the study levels |
| PITTSBORO WATER COMPANY | IN5232019 | 4,113 | Surface water purchased | 2 | Below the study levels |
| PLAINFIELD RE-ENTRY EDUCATIONAL FACILITY | IN5232007 | 4,500 | Ground water | 1 | Below the study levels |
| PLAINFIELD WATER WORKS | IN5232020 | 34,477 | Ground water | 3 | Below the study levels |
| PLYMOUTH WATER DEPARTMENT, IN | IN5250010 | 10,241 | Ground water | 2 | Below the study levels |
| PORTLAND MUNICIPAL WATER PLANT | IN5238007 | 6,209 | Ground water | 1 | Below the study levels |
| POSEY TOWNSHIP WATER CORP. | IN5288006 | 3,500 | Surface water purchased | 2 | Below the study levels |
| PRINCES LAKE WATER DEPARTMENT | IN5241007 | 4,095 | Ground water | 1 | Below the study levels |
| PRINCETON WATER DEPARTMENT | IN5226008 | 10,875 | Ground water | 1 | Below the study levels |
| PURDUE UNIV. WATER WORKS | IN5279015 | 50,000 | Ground water | 6 | Below the study levels |
| RAMSEY WATER COMPANY, INC. | IN5231005 | 16,475 | Ground water | 1 | Reached a study level |
| RENSSELAER WATER DEPARTMENT | IN5237005 | 6,200 | Ground water | 1 | Below the study levels |
| REO WATER CORPORATION | IN5274009 | 3,875 | Ground water | 1 | Below the study levels |
| ROANN WATER WORKS | IN5285013 | 400 | Ground water | 1 | Below the study levels |
| ROCHESTER WATER DEPARTMENT | IN5225006 | 6,218 | Ground water | 1 | Below the study levels |
| ROCKVILLE LIGHT & WATER | IN5261006 | 4,195 | Ground water | 1 | Below the study levels |
| ROYAL CENTER WATER UTILITY | IN5209008 | 861 | Ground water | 1 | Below the study levels |
| RURAL MEMBERSHIP WATER CORP. OF CLARK CO | IN5210009 | 8,630 | Ground water purchased | 2 | Below the study levels |
| RUSHVILLE CITY UTILITY | IN5270005 | 6,800 | Ground water | 1 | Below the study levels |
| SALEM WATER WORKS | IN5288005 | 8,200 | Surface water | 1 | Below the study levels |
| SANTA CLAUS WATER UTILITY | IN5274010 | 3,683 | Surface water purchased | 2 | Below the study levels |
| SCHERERVILLE WATER DEPARTMENT | IN5245041 | 30,000 | Surface water purchased | 1 | Below the study levels |
| SCOTTSBURG WATER DEPARTMENT | IN5272001 | 7,369 | Surface water | 2 | Below the study levels |
| SELLERSBURG WATER DEPARTMENT | IN5210010 | 15,655 | Ground water | 1 | Below the study levels |
| SISTERS OF HOLY CROSS-ST. MARYS COLLEGE | IN5271025 | 2,111 | Ground water | 1 | Below the study levels |
| SOUTH BEND WATER WORKS | IN5271014 | 115,000 | Ground water | 9 | Reached a study level |
| SOUTH HARRISON WATER CORPORATION | IN5231006 | 9,057 | Ground water | 1 | Below the study levels |
| SOUTH LAWRENCE UTILITIES | IN5247007 | 6,395 | Ground water | 1 | Below the study levels |
| SOUTHERN MONROE WATER AUTHORITY | IN5253007 | 8,877 | Surface water purchased | 1 | Below the study levels |
| SOUTHWESTERN BARTHOLOMEW WATER CORP. | IN5203008 | 8,652 | Ground water purchased | 1 | Below the study levels |
| SPEEDWAY WATER WORKS | IN5249008 | 10,578 | Surface water | 2 | Below the study levels |
| SPRINGS VALLEY REGIONAL WATER DISTRICT | IN5259002 | 3,188 | Surface water purchased | 1 | Below the study levels |
| ST. JOHN MUNICIPAL WATER UTILITY | IN5245043 | 25,700 | Ground water | 2 | Below the study levels |
| STUCKER FORK WATER UTILITY | IN5272002 | 17,718 | Surface water | 2 | Below the study levels |
| TELL CITY WATER DEPARTMENT | IN5262004 | 9,315 | Ground water | 1 | Below the study levels |
| TENNYSON WATER UTILITY | IN5287007 | 4,158 | Surface water purchased | 1 | Below the study levels |
| TIPTON UTILITY SERVICE B | IN5280004 | 5,200 | Ground water | 1 | Below the study levels |
| TOWN OF ELIZABETH | IN5231007 | 4,450 | Ground water | 1 | Below the study levels |
| TRI-TOWNSHIP WATER CORPORATION | IN5215009 | 10,435 | Ground water | 2 | Below the study levels |
| TWIN LAKES UTILITIES, INC. | IN5245046 | 8,000 | Ground water | 2 | Below the study levels |
| UNION CITY WATER WORKS | IN5268010 | 3,513 | Ground water | 2 | Below the study levels |
| UNIVERSITY OF NOTRE DAME | IN5271020 | 7,400 | Ground water | 7 | Below the study levels |
| VALLEY RURAL UTILITY COMPANY | IN5215004 | 5,529 | Ground water purchased | 1 | Below the study levels |
| VALPARAISO DEPARTMENT OF WATER WORKS | IN5264029 | 36,000 | Ground water | 2 | Below the study levels |
| VAN BUREN WATER, INC. | IN5253008 | 6,670 | Surface water purchased | 1 | Below the study levels |
| VEOLIA WATER OF BOONVILLE | IN5287001 | 10,260 | Ground water | 1 | Below the study levels |
| VINCENNES WATER DEPARTMENT | IN5242014 | 18,701 | Ground water | 1 | Below the study levels |
| WALKERTON LIGHT & WATER | IN5271017 | 2,262 | Ground water | 1 | Below the study levels |
| WARREN MUNICIPAL WATER WORKS | IN5235012 | 1,237 | Ground water | 1 | Below the study levels |
| WASHINGTON TOWNSHIP WATER | IN5210015 | 4,315 | Ground water | 2 | Below the study levels |
| WASHINGTON TWP WATER AUTHORITY | IN5253009 | 3,825 | Surface water purchased | 1 | Below the study levels |
| WASHINGTON WATER WORKS | IN5214007 | 13,690 | Ground water | 1 | Below the study levels |
| WATSON RURAL WATER COMPANY | IN5210016 | 15,750 | Ground water | 1 | Below the study levels |
| WEST TERRE HAUTE WATER | IN5284015 | 4,075 | Ground water | 1 | Reached a study level |
| WHITELAND WATER WORKS | IN5241009 | 5,955 | Ground water purchased | 1 | Below the study levels |
| WHITING WATER DEPARTMENT | IN5245048 | 4,900 | Surface water purchased | 1 | Below the study levels |
| YORKTOWN WATER DEPARTMENT | IN5218014 | 6,200 | Ground water | 4 | Below the study levels |
How the count works
What is included
Each active community water system with complete monitoring is counted once, even if it is linked with several ZIP codes. Private wells are excluded, and UCMR 5 did not comprehensively monitor every small system. This page does not apply Indiana's state-specific standards or determine compliance. Use the official state or territory drinking-water program for current regulatory information.