County Water Quality Report

Hamilton County, Ohio

2 public water systems serving 1,059,200 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
61/100
Utilities rated 2
Population served 1,059,200
Most recent test 2024

Top water quality concerns in Hamilton County

  • PFAS contaminationin 1 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 2 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 1 of 2 utilities
  • Bromodichloromethane significantly above health guidelinein 1 of 2 utilities
  • Arsenic detectedin 1 of 2 utilities

All utilities in Hamilton County

Click any utility for full grade card, contaminant data, and treatment plant contact info.

D
61/100

CINCINNATI PUBLIC WATER SYSTEM

CINCINNATI · 750,200 residents

Top concern: PFAS contamination

View report →
D
61/100

City of Cincinnati Water Department

Cincinnati · 309,000 residents

Top concern: Lead detected in source water

View report →