County Water Quality Report

Denver County, Colorado

2 public water systems serving 2,003,000 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 2
Population served 2,003,000
Most recent test 2024

Top water quality concerns in Denver County

  • Haloacetic acids (HAA9) significantly above health guidelinein 1 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 2 utilities
  • Lead detected in source waterin 1 of 2 utilities
  • Haloacetic Acids (HAA5) significantly above health guidelinein 1 of 2 utilities

All utilities in Denver County

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

C
67/100

DENVER WATER BOARD

DENVER · 1,287,000 residents

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

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C
66/100

Denver Municipal Water System

Denver · 716,000 residents

Top concern: Lead detected in source water

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