County Water Quality Report

St. Louis city County, Missouri

1 public water system serving 304,709 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 1
Population served 304,709
🇪🇺 Would fail EU standards 1 of 1

Top water quality concerns in St. Louis city County

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

All utilities in St. Louis city County

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

C
67/100

ST LOUIS CITY PWS

ST. LOUIS · 304,709 residents

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

View report →