County Water Quality Report

Harris County, Texas

6 public water systems serving 5,682,322 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 6
Population served 5,682,322
Most recent test 2024
🇪🇺 Would fail EU standards 3 of 6

Top water quality concerns in Harris County

  • Haloacetic acids (HAA9) significantly above health guidelinein 5 of 6 utilities
  • PFAS contaminationin 4 of 6 utilities
  • Perfluorohexane sulfonate (PFHXS) significantly above health guidelinein 3 of 6 utilities
  • Bromochloroacetic acid significantly above health guidelinein 3 of 6 utilities
  • Arsenic significantly above health guidelinein 2 of 6 utilities

All utilities in Harris County

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

D
64/100

CITY OF HOUSTON UD 5 - KINGWOOD

HOUSTON · 80,073 residents

Top concern: Arsenic significantly above health guideline

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D
61/100

CITY OF BAYTOWN

BAYTOWN · 86,004 residents

Top concern: PFAS contamination

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D
59/100

CITY OF HOUSTON

HOUSTON · 2,970,543 residents

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

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D
55/100

Houston Water Utilities

Houston · 2,304,000 residents

Top concern: PFAS contamination

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F
53/100

CLEAR LAKE CITY WATER AUTHORITY

HOUSTON · 89,702 residents

Top concern: PFAS contamination

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F
53/100

CITY OF PASADENA

PASADENA · 152,000 residents

Top concern: PFAS contamination

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