State Hub
Ohio Water Quality
698
Utilities in database
11.7M
Residents served
2
With open violations
328
PFAS monitored
Quick Answer
Ohio public drinking water is served by 698 EPA-tracked water systems, providing service to approximately 11.7 million residents through public utilities. 2 of those systems currently have open health-based violations on record in the EPA federal database. 328 systems have official PFAS monitoring records from the EPA UCMR 5 program (2023–2025). About 12% of OH residents use private wells, which fall outside federal utility compliance monitoring.
2 Ohio water systems have open health-based violations 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 Ohio
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 Ohio
Ohio draws water from Lake Erie and inland rivers. Lead contamination in older housing stock — particularly in cities like Toledo and Cleveland — is a documented concern. Agricultural runoff contributes nitrate loading near Lake Erie. Several communities near industrial sites have documented PFAS detections. Ohio EPA holds primary enforcement authority.
Highest Risk Utilities
Ohio systems with open health-based violations in EPA records.
Safest Large Utilities
Ohio systems with no open health violations serving 10,000+ residents.
Utilities in Ohio
426–450 of 698Roseville Pws
OH6002112 · 1,852 served
North Lewisburg Village Pws
OH1100812 · 1,850 served
Leetonia Village Pws
OH1501412 · 1,833 served
Northern Perry Co.water #2
OH6402703 · 1,802 served
Lewisburg Village Pws
OH6800812 · 1,800 served
Pomeroy Village Pws
OH5300212 · 1,800 served
West Liberty Village Pws
OH4602412 · 1,800 served
Tanglewood Lake Water Co
OH2802512 · 1,800 served
Mcconnelsville Village
OH5800512 · 1,780 served
Windham Village Pws
OH6704812 · 1,777 served
Roaming Shores Village Pws
OH0400611 · 1,764 served
West Unity Village
OH8601812 · 1,760 served
Antwerp Village Pws
OH6300012 · 1,741 served
Canal Pointe Industrial Park Pws
OH2346603 · 1,721 served
Erie Co Huron East District
OH2200403 · 1,713 served
Candlewood Lake Association Inc
OH5901012 · 1,710 served
Trumbull Co. - Mosquito Creek Pws
OH7806403 · 1,708 served
Northern Perry Co.water #1
OH6400912 · 1,706 served
South Amherst Village Pws
OH4701411 · 1,688 served
New Paris Village Pws
OH6800912 · 1,681 served
Carlisle City Pws
OH8303803 · 1,675 served
Orwell Village Pws
OH0401012 · 1,660 served
South Charleston Village Pws
OH1204212 · 1,660 served
Glouster Public Water System
OH0500703 · 1,659 served
Russells Point Village Pws
OH4602212 · 1,651 served
Key Contaminant Concerns in Ohio
These contaminants appear most frequently in Ohio utility records or pose elevated risk in this region based on EPA data.
PFAS
Per- and polyfluoroalkyl substances (PFAS) are a class of over 12,000 synthetic chemicals characterized by strong carbon-fluorine bonds that resist degradation. The two most studied — PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonic acid) — have been phased out of U.S. manufacturing but persist widely in the environment.
EPA limit: 4 ppt
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 Ohio
Tap water quality pages for Ohio cities — violations, PFAS records, utility profiles, and official source links.
Ohio PFAS Watchlist — all utilities with official recordsIndependent Water Testing
Find a certified lab in Ohio
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. Ohio labs can test for PFAS, lead, nitrates, bacteria, and dozens of other contaminants.
Explore Water Quality in Ohio
Roseville Pws
Violation history, PFAS records, and official source links
North Lewisburg Village Pws
Violation history, PFAS records, and official source links
Leetonia Village Pws
Violation history, PFAS records, and official source links
PFAS monitoring records — Ohio
328 water systems in Ohio with EPA UCMR 5 records
Active drinking water violations
2 open health-based violations on record — view official EPA SDWIS data
Lead in Ohio drinking water
State-specific lead data, violation utilities, and testing guidance
PFAS in Ohio drinking water
State-specific PFAS data, MCL context, and treatment options
Certified water testing labs in Ohio
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 Ohio Drinking Water
Does Ohio drinking water have PFAS?
328 Ohio water systems have EPA UCMR 5 PFAS monitoring records (2023–2025)
Which Ohio water utilities have open violations?
2 systems have open health-based violations in EPA SDWIS — search for your utility
How do I test my water in Ohio?
State-certified labs for PFAS (EPA 533/537.1), lead, nitrate, and bacteria testing
What treatment removes PFAS from OH tap water?
Reverse osmosis removes PFAS, lead, arsenic, and nitrates — cost, maintenance, and NSF certification explained
What do Ohio PFAS records tell me about my water?
EPA limits, health context, and what UCMR 5 detection above MRL means for your water
How is Ohio water quality data sourced here?
EPA SDWIS violations, UCMR 5 PFAS records, and CCR data — sources, accuracy notes, and limitations
Ohio 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: 2025-01-10