Water Quality in Ohio

1,094 water systems • 0 cities • EPA SDWIS Data

1,094
Water Systems
61,604
Total Violations
0
Health-Based Violations
10,443,946
Population Served

Overview

Ohio ranks 8th among all U.S. states for total drinking water violations, out of 51 states tracked. The state has 61,604 EPA Safe Drinking Water Act violations on record across 1,094 water systems serving 0 cities. None of the recorded violations are classified as health-based, indicating no contaminant was measured above safe EPA thresholds. Ohio's total violation count is 73% above the national average. Water systems in Ohio serve approximately 10,443,946 people. The most frequently cited contaminants in Ohio violations include Coliform (TCR), TTHM, Total Haloacetic Acids (HAA5), Chlorine, Nitrate.

Largest Cities in Ohio

# City Population Violations Water Systems

All Cities in Ohio

City Population Violations Health Violations Contaminants

Water Quality in Other States

Data Sources

Drinking water data from the EPA Safe Drinking Water Information System (SDWIS). Only active community water systems (CWS) serving 100+ people are included.

Verify at epa.gov