County Water Quality Report

Washtenaw County, Michigan

2 public water systems serving 177,839 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
C
70/100
Utilities rated 2
Population served 177,839

Top water quality concerns in Washtenaw County

  • Haloacetic acids (HAA9) significantly above health guidelinein 2 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 2 of 2 utilities
  • PFAS contaminationin 1 of 2 utilities
  • Bromate significantly above health guidelinein 1 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 2 utilities

All utilities in Washtenaw County

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

B
78/100

YPSILANTI COMMUNITY UTILITY AUTHORITY

YPSILANTI · 53,988 residents

Top concern: Haloacetic acids (HAA9) significantly above health guideline

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D
61/100

ANN ARBOR

ANN ARBOR · 123,851 residents

Top concern: PFAS contamination

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