Indiana tap water quality

767 active community water systems.

Largest water systems

Grade	System	People	Health violations (5y)
A	Citizens Energy Group Water (Indianapolis)	880,345	0
B	Fort Wayne - 3 Rivers Filtration Plant	269,994	1
A	Indiana American Water - Northwest	210,510	0
A	Evansville Water Utility	182,444	0
C	South Bend Water Works	115,000	0
A	Indiana American Water - S. Indiana	104,445	0
C	Carmel Water Department	99,927	2
A	Indiana American Water - Johnson County	86,813	0
B	City of Bloomington Utilities	83,000	1
B	Hammond Water Works Department	78,384	0
A	Indiana American Water - Muncie	74,030	0
A	Lafayette Water Works	70,835	0
A	Indiana American Water - Terre Haute	67,765	0
A	Citizens Water of Westfield, LLC	61,493	0
A	Indiana American Water - Kokomo	59,313	0
C	Anderson Water Department	55,212	2
A	Columbus Municipal Utility	51,122	0
A	Purdue Univ. Water Works	50,000	0
A	Mishawaka Utilities	49,675	0
D	City of Lawrence Utilities	49,000	4
A	Elkhart Public Works and Utilities	46,455	0
A	Indiana American Water - Noblesville	45,575	0
A	Indiana American Water - Richmond	41,485	0
A	Valparaiso Department of Water Works	36,000	0
A	Indiana American Water - West Lafayette	35,533	0
A	Plainfield Water Works	34,477	0
B	Bargersville Water Department	34,418	0
A	Michigan City Department of Water Works	33,996	0
A	Goshen Water Utility	32,267	0
A	Brownsburg Water Works	31,250	0
A	Crown Point Water Works	30,000	0
A	Schererville Water Department	30,000	0
A	Marion City Water Works	28,363	0
A	Greenfield Water Utility	26,671	0
B	East Chicago Water Works	26,370	0
A	St. John Municipal Water Utility	25,700	0
A	Highland Water Works	23,984	0
A	Munster Water Company	23,894	0
A	Indiana American Water - Newburgh	22,215	0
C	Laporte Water Works	22,197	2
A	Indiana American Water - Seymour	20,725	0
A	Chandler Water Works Department	20,120	0
B	New Castle Utilities	19,880	0
A	Indiana American Water - Shelbyville	19,093	0
A	Eastern Heights Utilities	19,028	0
B	Vincennes Water Department	18,701	1
A	Logansport Municipal Utility-Well Field	18,369	0
B	Stucker Fork Water Utility	17,718	0
A	Jasper Municipal Water Utility	17,440	0
C	Huntington Water Department	17,300	2

Most issues (systems serving 10,000+)

City of Lawrence Utilities

Serves 49,000 people · Groundwater · Full report →

4 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).

Borden Tri-County Region

Serves 11,000 people · Surface water · Full report →

4 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).

Brown County Water Utility

Serves 15,368 people · Groundwater · Full report →

No health-based violations in the last 5 years; 2 monitoring/reporting violations; PFOA/PFOS average above the 4 ppt federal limit: PFOS, PFOA; Lead 90th percentile below the action level (2025).

South Bend Water Works

Serves 115,000 people · Groundwater · Full report →

No health-based violations in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Other PFAS above 2024 limits (rule proposed for repeal): PFHxS, Hazard Index; Lead 90th percentile below the action level (2025).

Ramsey Water Company, Inc.

Serves 16,475 people · Groundwater · Full report →

1 health-based violation in the last 5 years; 1 monitoring/reporting violation; PFOA/PFOS average above the 4 ppt federal limit: PFOA; Lead 90th percentile below the action level (2023).

Carmel Water Department

Serves 99,927 people · Surface water · Full report →

2 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).

Anderson Water Department

Serves 55,212 people · Surface water · Full report →

2 health-based violations in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).

Laporte Water Works

Serves 22,197 people · Groundwater · Full report →

2 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2023).

Greensburg Municipal Water Works

Serves 12,650 people · Surface water · Full report →

2 health-based violations in the last 5 years; 1 monitoring/reporting violation; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2024).

Huntington Water Department

Serves 17,300 people · Groundwater · Full report →

2 health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2025).

Fort Wayne - 3 Rivers Filtration Plant

Serves 269,994 people · Surface water · Full report →

1 health-based violation in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile below the action level (2026).

Washington Water Works

Serves 13,690 people · Groundwater · Full report →

1 health-based violation in the last 5 years; 2 monitoring/reporting violations; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile above the new 10 ppb action level (LCRI, effective Nov 1, 2027); Lead 90th percentile below the action level (2023).

Cities

Advance Akron Albany Albion Alexandria Ambia Amboy Anderson Andrews Angola Arcadia Argos Ashley Ashley (Rr Name Ashley-Hudson)Atlanta Attica Auburn Aurora Austin Avilla Avoca Avon Bainbridge Bargersville Batesville Battle Ground Bedford Beech Grove Bennington Berne Beverly Shores Bicknell Birdseye Bloomfield Bloomingdale Bloomington Bluffton Boggstown Boonville Borden Boswell Bourbon Bowling Green Brazil Bremen Bringhurst Bristol Brook Brooklyn Brookston Brookville Brownsburg Brownstown Bruceville Buckskin Buffalo Bunker Hill Burnettsville Butler Butlerville Cambridge City Camby Camden Campbellsburg Canaan Cannelburg Cannelton Carbon Carlisle Carmel Carthage Cayuga Cedar Lake Celestine Center Point Centerpoint Centerville Central Chalmers Chandler Charlestown Chesterfield Chesterton Chrisney Churubusco Cicero Clarks Hill Clarksville Clay City Claypool Clayton Clifford Clinton Cloverdale Coal City Coalmont Colfax Columbia City Columbus Commiskey Connersville Converse Corunna Corydon Covington Crandall Crane Crawfordsville Cromwell Cross Plains Crothersville Crown Point Culver Cynthiana Dale Daleville Dana Danville Darlington Dayton Decatur Decker Delphi Demotte Depauw Deputy Derby Dillsboro Donaldson Dublin Dubois Dugger Dunkirk Dupont Dyer Eagletown Earl Park East Chicago East Enterprise Eaton Edinburg Edinburgh Edwardsport Elberfeld Elizabeth Elizabethtown Elkhart Ellettsville Elnora Elwood English Etna Green Evanston Evansville Fairland Fairmount Fairview Park Farmersburg Farmland Ferdinand Fillmore Fishers Flat Rock Flora Florence Floyds Knobs Fontanet Fort Branch Fort Wayne Fortville Fountain City Fountaintown Fowler Francesville Francisco Frankfort Franklin Frankton Fredericksburg Freelandville Freetown Fremont French Lick Friendship Galena Galveston Garrett Gary Gas City Gaston Geneva Gentryville Georgetown Glenwood Goodland Goshen Gosport Grabill Grammer Grandview Grandview (Grand View)Granger Grantsburg Greencastle Greenfield Greensburg Greentown Greenville Greenwood Griffith Grovertown Guilford Hagerstown Hamilton Hamlet Hammond Hanover Hardinsburg Harlan Harmony Harrodsburg Hartford City Hartsville Hatfield Haubstadt Hazleton Hebron Heltonville Henryville Highland Highland (Highlands)Hillsboro Hillsdale Hoagland Hobart Holland Holton Hope Howe Hudson Huntertown Huntingburg Huntington Huron Hymera Indianapolis Ingalls Ireland Jamestown Jasonville Jasper Jeffersonville Jonesboro Jonesville Kendallville Kentland Kewanna Kimmell Kingman Kingsbury Kingsford Heights Kirklin Knightstown Knightsville Knox Kokomo Kouts La Crosse LA Fontaine LA Porte Laconia Lacrosse Ladoga Lafayette Lagrange Lagrange (LA Grange)Lagro Lake Station Lake Village Lakeville Lamar Lanesville Laotto (LA Otto)Lapaz Lapel Laporte Laurel Lawrence Lawrenceburg Leavenworth Lebanon Leesburg Leo Leopold Lewis Lewisville Lexington Liberty Liberty Mills Ligonier Lincoln City Linden Linton Lizton Logansport Long Beach Loogootee Losantville (Bronson)Lowell Lynn Lynnville Lyons Madison Manilla Marengo Mariah Hill Marion Markle Marshall Martinsville Marysville Mccordsville Mecca Medaryville Medora Memphis Mentone Merom Merrillville Miami Michigan City Michigantown Middlebury Middletown Milan Milford Millersburg Milltown Milroy Milton Mishawaka Mitchell Modoc Monon Monroe Monroe City Monroeville Monrovia Montezuma Montgomery Monticello Montpelier Moores Hill Mooresville Morgantown Morocco Morristown Mount Ayr Mount Summit Mount Vernon Mulberry Muncie Munster Nabb Napoleon Nappanee Nashville New Albany New Carlisle New Castle New Goshen New Harmony New Haven New Market New Middletown New Palestine New Point New Richmond New Salisbury New Washington New Waverly Newberry Newburgh Newport Nineveh Noblesville Norman North Judson North Liberty North Manchester North Salem North Vernon North Webster Notre Dame Oakland City Oakland City Junction Oaktown Odon Ogden Dunes (Wickliffe)Oldenburg Onward Oolitic Orestes Orland Orleans Osceola Osgood Ossian Otisco Otterbein Otwell Owensburg Owensville Oxford Palmyra Paoli Paragon Paris Crossing Parker City Patoka Patricksburg Patriot Paxton Pekin Pendleton Pennville Perrysville Peru Petersburg Pierceton Pittsboro Plainfield Plainville Pleasant Lake Plymouth Poland Portage Portland Poseyville Princeton Ramsey Redkey Redkey (Red Key)Reelsville Remington Rensselaer Reynolds Richland Richland City Richmond Ridgeville Riley Rising Sun Roachdale Roann Roanoke Rochester Rockport Rockville Rolling Prairie Rome Rome City Rosedale Rossville Royal Center Rushville Russellville Russiaville Saint Anthony Saint Croix Saint Joe Saint John Saint Mary Of The Woods Saint Meinrad Saint Paul Salem Sandborn Santa Claus Schererville Schneider Schnellville Scipio Scotland Scottsburg Seelyville Sellersburg Selma Seymour Sharpsville Shelburn Shelbyville Shepardsville Sheridan Shipshewana Shirley Shoals Silver Lake Smithville Solsberry Somerset South Bend South Whitley Speedway Spencer Spiceland Springville Spurgeon St. Anthony St. Bernice St. Joe St. John St. Mary-Of-The-Woods St. Meinrad St. Paul Stanford Staunton Stendal Stinesville Sullivan Sumava Resorts Summitville Sunman Swayzee Switz City Syracuse Taswell Taylorsville Tell City Tennyson Terre Haute Thayer Thorntown Tipton Topeka Trafalgar Troy Underwood Union City Unionville Universal Upland Vallonia Valparaiso Van Buren Veedersburg Velpen Vernon Versailles Vevay Vincennes Wabash Wadesville Wakarusa Waldron Walkerton Walton Wanatah Warren Warsaw Washington Waterloo Waveland Waynetown West Baden Springs West Baden Springs (Corporate West Harrison West Lafayette West Lebanon West Newton West Terre Haute Westfield Westport Westville Wheatfield Wheatland Wheeler Whiteland Whitestown Whiting Williams Williamsport Winamac Winchester Windfall Wingate Winona Lake Winslow Wolcott Wolcottville Woodburn Worthington Yeoman Yoder Yorktown Zanesville Zionsville

Indiana tap water quality

Largest water systems

Most issues (systems serving 10,000+)

City of Lawrence Utilities

Borden Tri-County Region

Brown County Water Utility

South Bend Water Works

Ramsey Water Company, Inc.

Carmel Water Department

Anderson Water Department

Laporte Water Works

Greensburg Municipal Water Works

Huntington Water Department

Fort Wayne - 3 Rivers Filtration Plant

Washington Water Works

Pike-Gibson Water, Inc.

City of Bloomington Utilities

Vincennes Water Department

Lebanon Utilities

Bedford City Utilities

Indiana American Water - Lowell

Speedway Water Works

Princeton Water Department

Cities