County Water Quality Report

Barnstable County, Massachusetts

3 public water systems serving 218,801 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
66/100
Utilities rated 3
Population served 218,801

Top water quality concerns in Barnstable County

  • PFAS contaminationin 2 of 3 utilities
  • Perfluorohexane sulfonate (PFHXS) significantly above health guidelinein 2 of 3 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 2 of 3 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 2 of 3 utilities
  • Chromium (hexavalent) significantly above health guidelinein 1 of 3 utilities

All utilities in Barnstable County

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

A
92/100

UPPER CAPE REGIONAL WATER COOPERATIVE

SANDWICH · 56,250 residents

Top concern: Chromium (hexavalent) significantly above health guideline

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D
56/100

DENNIS WATER DISTRICT

DENNIS · 65,000 residents

Top concern: PFAS contamination

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F
50/100

FALMOUTH WATER DEPT

FALMOUTH · 97,551 residents

Top concern: PFAS contamination

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