Wyoming Water Quality Ratings

TapWaterSafety has rated 2 public water systems in Wyoming, serving a combined 123,165 residents. The statewide average grade is D.

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
State average grade
D
64/100
Total utilities rated 2
Population served 123,165

Top water quality concerns in Wyoming

  • Haloacetic acids (HAA9) significantly above health guideline
  • Total trihalomethanes (TTHMs) significantly above health guideline
  • Haloacetic acids (HAA5) significantly above health guideline
  • Bromochloroacetic acid* significantly above health guideline
  • Total trihalomethanes (TTHMs)* significantly above health guideline

Cities in Wyoming

Browse tap water quality reports by city. Click any city to see its grade, what's in the water, and recommended filters.

CASPER
D 59,000
CHEYENNE
D 64,165

Grade distribution

A
0 (0%)
B
0 (0%)
C
0 (0%)
D
2 (100%)
F
0 (0%)

All rated utilities in Wyoming

Sorted by score, highest first. Click any utility to see the full grade card.

Rank Utility City Population Score Grade
#1 CHEYENNE BOARD OF PUBLIC UTILITIES CHEYENNE 64,165 64 D
#2 CASPER, CITY OF CASPER 59,000 64 D