Ohio

Ohio drinking water quality

Every public water system in Ohio we've verified. Each report covers one calendar year and shows the utility's own measured contaminant levels against federal limits.

• Akron (2024)
  25 contaminants measured· 1 at or above the limit
• Cleveland (2024)
  53 contaminants measured
• Columbus (2025)
  53 contaminants measured· 11 at or above the limit
• Dayton (2024)
  18 contaminants measured
• Toledo (2024)
  12 contaminants measured