Indiana tap water quality
767 community water systems serving 5.2 million people.
Data: U.S. EPA · How we read the data · How we check it
PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 25 more systems have no recent lead results in EPA's database.
Water systems with PFAS above the federal limit
Based on EPA's UCMR 5 results (2023–2025) compared to the April 2024 limits, the way EPA compares them. Systems have until 2029 to comply. Largest first.
- South Bend Water Works115,000 people · Groundwater · IndianaPFOA above limitAlso: PFHxS above limit · PFAS Hazard Index above limit
- Ramsey Water Company, Inc.16,475 people · Groundwater · IndianaPFOA above limitAlso: 1 health-based violation since 2016
- Brown County Water Utility15,368 people · Groundwater · IndianaPFOA above limitAlso: PFOS above limit · Lithium above screening level
- Indiana American Water – Charlestown8,658 people · Groundwater · IndianaPFOA above limitAlso: Coliform bacteria violation
- Marysville Otisco Nabb Water Corp.6,813 people · Purchased groundwater · IndianaPFOA above limit
- West Terre Haute Water4,075 people · Groundwater · IndianaPFOS above limitAlso: PFHxS detected
Indiana PFAS report: chart, rankings and data to download →
Largest water systems in Indiana
- Citizens Water – Indianapolis880,345 people · Surface water · IndianaNo PFAS above limits
- Fort Wayne – 3 Rivers Filtration Plant269,994 people · Surface water · IndianaNo PFAS above limitsAlso: 1 health-based violation since 2016
- Indiana American Water – Northwest210,510 people · Surface water · IndianaNo PFAS above limits
- Evansville Water Utility182,444 people · Surface water · IndianaNo PFAS above limits
- South Bend Water Works115,000 people · Groundwater · IndianaPFOA above limitAlso: PFHxS above limit · PFAS Hazard Index above limit
- Indiana American Water – Southern Indiana104,445 people · Groundwater · IndianaNo PFAS above limits
- Carmel Water Department99,927 people · Groundwater under influence of surface water · IndianaColiform bacteria violation
- Indiana American Water – Johnson County86,813 people · Groundwater · IndianaNo PFAS above limits
- City of Bloomington Utilities83,000 people · Surface water · IndianaNo PFAS above limitsAlso: 3 health-based violations since 2016
- Hammond Water Works Department78,384 people · Surface water · IndianaNo PFAS above limitsAlso: 1 health-based violation since 2016
- Indiana American Water – Muncie74,030 people · Surface water · IndianaNo PFAS above limits
- Lafayette Water Works70,835 people · Groundwater · IndianaNo PFAS above limits
- Indiana American Water – Terre Haute67,765 people · Groundwater · IndianaPFOS detected
- Citizens Water of Westfield, LLC61,493 people · Groundwater · IndianaNo PFAS above limits
- Indiana American Water – Kokomo59,313 people · Surface water · IndianaNo PFAS above limits
Indiana cities and towns
- Anderson
- Bloomington
- Brownsburg
- Carmel
- Columbus
- Crown Point
- East Chicago
- Elkhart
- Evansville
- Fort Wayne
- Franklin
- Gary
- Goshen
- Greenfield
- Greenwood
- Hammond
- Hobart
- Indianapolis
- Jeffersonville
- Kokomo
- Lafayette
- Lawrence
- Marion
- Merrillville
- Michigan City
- Mishawaka
- Muncie
- New Albany
- Noblesville
- Plainfield
- Richmond
- Schererville
- South Bend
- Terre Haute
- Valparaiso
- West Lafayette
- Westfield
- Zionsville
Most health-based violations since 2016
- Salt Creek Services, Inc.90 people · Surface water · IndianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Salem Water Works8,200 people · Surface water · IndianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations · Coliform bacteria violation
- North Vernon Water Department6,500 people · Surface water · IndianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Glenwood Water Works313 people · Groundwater · IndianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Montezuma Municipal Utility1,022 people · Groundwater · IndianaNitrate violations
- Westport Water Company1,725 people · Surface water · IndianaTotal trihalomethanes (TTHM) violations
- Oolitic Water Works1,315 people · Purchased surface water · IndianaTotal trihalomethanes (TTHM) violationsAlso: Haloacetic acids (HAA5) violations
- Willow Springs MHP25 people · Groundwater · IndianaColiform bacteria violations
- Hamilton Grove Water System384 people · Groundwater · IndianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
- Riley Resort Land Trust Water System39 people · Groundwater · IndianaArsenic violations
- Poseyville Municipal Water Department1,400 people · Groundwater · IndianaNitrate violations
- Kingman Water Works560 people · Groundwater · IndianaArsenic violationsAlso: Lead near 2027 level
- Michiana Estates LLC – Water System35 people · Groundwater · IndianaNot in EPA's PFAS sampleAlso: 10 health-based violations since 2016
- Prossers Country Estates Water System85 people · Groundwater · IndianaColiform bacteria violation
- East Washington Rural Water8,613 people · Purchased surface water · IndianaHaloacetic acids (HAA5) violationsAlso: Total trihalomethanes (TTHM) violations
All Indiana utilities on this site
Every Indiana system serving 50,000+ people or with PFAS above a federal limit, A to Z. Download all 767 systems as CSV.
- Anderson Water Department
- Brown County Water Utility
- Carmel Water Department
- Citizens Water – Indianapolis
- Citizens Water of Westfield, LLC
- City of Bloomington Utilities
- Columbus Municipal Utility
- Evansville Water Utility
- Fort Wayne – 3 Rivers Filtration Plant
- Hammond Water Works Department
- Indiana American Water – Charlestown
- Indiana American Water – Johnson County
- Indiana American Water – Kokomo
- Indiana American Water – Muncie
- Indiana American Water – Northwest
- Indiana American Water – Southern Indiana
- Indiana American Water – Terre Haute
- Lafayette Water Works
- Marysville Otisco Nabb Water Corp.
- Purdue University Water Works
- Ramsey Water Company, Inc.
- South Bend Water Works
- West Terre Haute Water
Questions
Does Indiana tap water have PFAS?
EPA tested 219 community water systems in Indiana for 29 PFAS between 2023 and 2025. 23 had at least one regulated PFAS detected, and 6 had an entry-point average above a 2024 federal limit. Those 6 systems serve about 166,389 people (3% of people on community water in Indiana). Systems have until 2029 to meet the limits.
How many Indiana water systems have violations?
224 systems in Indiana had at least one health-based violation since 2016 (692 violations in total). 425 violations are currently listed as unaddressed.
Which Indiana water systems are over the lead action level?
6 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 25 systems have no lead results in EPA's database from the last five years, including 7 whose last result was above the action level. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.