County Water Quality Report

Boulder County, Colorado

2 public water systems serving 268,946 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 268,946

Top water quality concerns in Boulder County

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

All utilities in Boulder County

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

C
67/100

BOULDER CITY OF

BOULDER · 166,080 residents

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

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C
67/100

LONGMONT CITY OF

LONGMONT · 102,866 residents

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

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