County Water Quality Report

Delaware County, Pennsylvania

1 public water system serving 140,437 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
F
59/100
Utilities rated 1
Population served 140,437

Top water quality concerns in Delaware County

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

All utilities in Delaware County

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

D
59/100

CHESTER WATER AUTHORITY

CHESTER · 140,437 residents

Top concern: PFAS contamination

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