State Hub
Indiana Water Quality
513
Utilities in database
5.2M
Residents served
1
With open violations
219
PFAS monitored
Quick Answer
Indiana public drinking water is served by 513 EPA-tracked water systems, providing service to approximately 5.2 million residents through public utilities. 1 of those systems currently have open health-based violations on record in the EPA federal database. 219 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 30% of IN residents use private wells, which fall outside federal utility compliance monitoring.
1 Indiana water system has an open health-based violation recorded in EPA SDWIS. An open violation means a contaminant exceeded a federal limit and the violation has not been formally resolved in the federal database. Check individual utility pages for current status.
Open Health-Based Violations in Indiana
Records sourced from EPA SDWIS. A record may be under review or resolved at the utility level but not yet updated in federal records. Water Utility Report does not determine whether water is safe to drink.
Drinking Water in Indiana
Indiana has 513 community water systems serving approximately 5.2 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, lead, nitrates. 30% of Indiana residents rely on private wells. IDEM holds primary enforcement authority under the Safe Drinking Water Act.
Highest Risk Utilities
Indiana systems with open health-based violations in EPA records.
Safest Large Utilities
Indiana systems with no open health violations serving 10,000+ residents.
Utilities in Indiana
326–350 of 513Thorntown Utilities
IN5206005 · 1,600 served
Brooklyn Water Works
IN5255002 · 1,600 served
Haubstadt Water Department
IN5226003 · 1,600 served
Eaton Water Works
IN5218006 · 1,595 served
Daleville (town Of)
IN5218027 · 1,560 served
Painted Hills Utility Company
IN5255012 · 1,560 served
Natural Public Supply, Inc.
IN5236009 · 1,560 served
Milford Water Department
IN5243017 · 1,556 served
Knightsville Water Works
IN5211006 · 1,523 served
Arcadia Water Department
IN5229001 · 1,515 served
Montpelier Water Works
IN5205004 · 1,515 served
Lake Santee Rwwd
IN5216003 · 1,500 served
Trafalgar Water Department
IN5241014 · 1,490 served
South 43 Water Association, Inc.
IN5267009 · 1,431 served
Dayton Water Utility
IN5279021 · 1,420 served
Timberbrook Mobile Home Park
IN5220027 · 1,418 served
Poseyville Municipal Water Department
IN5265008 · 1,400 served
Parker City Water Department
IN5268007 · 1,400 served
Monroeville Water Works
IN5202008 · 1,400 served
Culver Water Department
IN5250005 · 1,391 served
Fci & Fpc - Terre Haute
IN5284018 · 1,390 served
Fairview Park Water Utilities
IN5283006 · 1,386 served
Madison State Hospital
IN5239005 · 1,375 served
Geneva Water Department
IN5201003 · 1,359 served
Aqua Indiana Water Company
IN5245017 · 1,350 served
Key Contaminant Concerns in Indiana
These contaminants appear most frequently in Indiana utility records or pose elevated risk in this region based on EPA data.
Lead
Lead is a naturally occurring heavy metal that was widely used in plumbing infrastructure until it was banned for new installations in 1986. An estimated 9.2 million lead service lines still connect homes to public water mains across the United States, along with millions of homes with lead solder in their internal plumbing. Critically, a utility's water quality report can show zero detected lead at the treatment plant while your specific tap still delivers elevated lead — because the contamination happens inside the distribution system and your home's plumbing, not at the source.
EPA limit: 15 ppb (action level)
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always caused by human activity — nitrate is converted in the digestive system to nitrite, which then reacts with hemoglobin to form methemoglobin, a form of hemoglobin that cannot carry oxygen. In the body, nitrite also reacts with amines in food to form N-nitroso compounds (nitrosamines) — known carcinogens classified by the IARC as Group 2A (probable human carcinogens). The United States applies over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination in U.S. groundwater.
EPA limit: 10 mg/L
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
EPA limit: 80 µg/L (TTHMs) / 60 µg/L (HAA5)
City Water Reports in Indiana
Tap water quality pages for Indiana cities — violations, PFAS records, utility profiles, and official source links.
Independent Water Testing
Find a certified lab in Indiana
Utility compliance records show what water systems report to the EPA. An independent test from a certified laboratory confirms what's actually in your tap water. Indiana labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Indiana
Thorntown Utilities
Violation history, PFAS records, and official source links
Brooklyn Water Works
Violation history, PFAS records, and official source links
Haubstadt Water Department
Violation history, PFAS records, and official source links
PFAS monitoring records — Indiana
219 water systems in Indiana with EPA UCMR 5 records
Active drinking water violations
1 open health-based violation on record — view official EPA SDWIS data
Lead in Indiana drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Indiana drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Indiana
Labs certified for PFAS (EPA 533/537.1), lead, and bacteria testing
Water treatment options
Reverse osmosis, activated carbon, and filtration guides with cost ranges
Data sources and methodology
How WaterUtilityReport.com sources and validates official EPA data
Common Questions About Indiana Drinking Water
Does Indiana drinking water have PFAS?
219 Indiana water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Indiana water utilities have open violations?
1 systems have open health-based violations in EPA SDWIS — search for your utility
How do I test my water in Indiana?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from IN tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Indiana PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Indiana water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Indiana Water FAQs
Data sources: Utility compliance and violation data from EPA SDWIS (Safe Drinking Water Information System). PFAS monitoring records from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule 5, 2023–2025). Contaminant data from EPA and ATSDR public references. This page summarizes public records — it is not a compliance determination. Methodology →
Last updated: 2026-04-19