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County Water Quality Report

Denton County, Texas

4 public water systems serving 481,743 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
C
71/100
Utilities rated 4
Population served 481,743
🇪🇺 Would fail EU standards 2 of 4

Top water quality concerns in Denton County

  • Haloacetic acids (HAA9) significantly above health guidelinein 4 of 4 utilities
  • Bromochloroacetic acid significantly above health guidelinein 4 of 4 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 3 of 4 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 4 utilities
  • PFAS contaminationin 1 of 4 utilities

All utilities in Denton County

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

B
79/100

CITY OF DENTON

DENTON · 150,037 residents

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

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C
72/100

CITY OF LEWISVILLE

LEWISVILLE · 140,880 residents

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

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C
69/100

TOWN OF FLOWER MOUND

FLOWER MOUND · 80,000 residents

Top concern: PFAS contamination

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C
65/100

MUSTANG SUD

AUBREY · 110,826 residents

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

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