Choose a country: United States
Ohio Water Quality
Ohio ranks #32 out of 49 states for tap water quality with a score of 83.3 out of 100.
Based on 580 scored cities covering 95.3% of the state's served population.
Summary
Best Cities in Ohio
Cities Needing Improvement
Cities listed carry the most serious water quality verdicts in Ohio, worst first, then the lowest scores. A city rated Safe is never listed.
Get Ohio Water Updates
We analyze new EPA data as it drops. Get the breakdown for Ohio in your inbox.
Free forever. Unsubscribe anytime. We never share your email.
Frequently Asked Questions About Ohio Water Quality
Ohio ranks #32 out of 49 states and territories for water quality with a score of 83.3 out of 100 and a grade of A. A total of 580 cities were tested across the state.
Curious how your own water compares to Ohio's ranking?
Upload your water test (PDF or a photo) and we'll email you a plain-English reading of each result — free. Educational only, no medical claims.
Your upload also helps us keep local water data accurate — we only ever share anonymized, area-level summaries.
Upload my testCheck Your City's Water Quality
See detailed water quality data and get personalized filter recommendations for your specific location.
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
One email a week. Unsubscribe anytime.