County Water Quality Report

Hays County, Texas

1 public water system serving 72,970 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 72,970

Top water quality concerns in Hays County

  • Perfluorohexane sulfonate (PFHXS) significantly above health guidelinein 1 of 1 utilities
  • Haloacetic acids (HAA9) significantly above health guidelinein 1 of 1 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 1 utilities

All utilities in Hays County

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

C
67/100

CITY OF SAN MARCOS

SAN MARCOS · 72,970 residents

Top concern: Perfluorohexane sulfonate (PFHXS) significantly above health guideline

View report →