Safe
Is tap water safe in
Ohio
United States
0
/ 100
Safe
About 86% of the population served by community water systems in Ohio had no recent health-based violation. The score reflects EPA drinking-water compliance, weighted by how many people each system serves.
1,125
Community water systems
10.5M
Population served
226
Systems w/ recent health violation
How Ohio’s score works
We pull every active community water system in Ohio from the EPA’s Safe Drinking Water Information System, then find those with a health-based violation in the last five years. The score is the share of the state’s water-system population served by systems without such a violation. City-level detail — utility, lead levels, and specific contaminants — is coming next.
Full methodology · Compliance snapshot, not a live reading. A system meeting federal standards can still carry risk (e.g. lead from home service lines). Not medical advice.