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County Water Quality Report

DuPage County, Illinois

2 public water systems serving 210,376 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
C
74/100
Utilities rated 2
Population served 210,376

Top water quality concerns in DuPage County

  • Haloacetic acids (HAA9) significantly above health guidelinein 2 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 2 of 2 utilities
  • Bromodichloromethane significantly above health guidelinein 1 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 2 utilities

All utilities in DuPage County

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

B
75/100

WHEATON

WHEATON · 53,970 residents

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

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C
72/100

NAPERVILLE

NAPERVILLE · 156,406 residents

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

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