County Water Quality Report

Yellowstone County, Montana

1 public water system serving 114,000 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
F
58/100
Utilities rated 1
Population served 114,000

Top water quality concerns in Yellowstone County

  • Arsenic significantly above health guidelinein 1 of 1 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 1 of 1 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 1 utilities

All utilities in Yellowstone County

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

D
58/100

BILLINGS CITY OF

BILLINGS · 114,000 residents

Top concern: Arsenic significantly above health guideline

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