County Water Quality Report

Marin County, California

2 public water systems serving 248,586 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
67/100
Utilities rated 2
Population served 248,586

Top water quality concerns in Marin County

  • Haloacetic acids (HAA5) significantly above health guidelinein 2 of 2 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 2 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 2 of 2 utilities
  • Arsenic detectedin 1 of 2 utilities

All utilities in Marin County

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

C
67/100

MARIN MUNICIPAL WATER DISTRICT

CORTE MADERA · 186,895 residents

Top concern: Haloacetic acids (HAA5) significantly above health guideline

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C
67/100

NORTH MARIN WATER DISTRICT

NOVATO · 61,691 residents

Top concern: Haloacetic acids (HAA5) significantly above health guideline

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