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