County Water Quality Report

Lake County, Indiana

2 public water systems serving 288,894 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 288,894

Top water quality concerns in Lake County

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

All utilities in Lake County

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

B
77/100

INDIANA AMERICAN WATER - NORTHWEST

MERRILLVILLE · 210,510 residents

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

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C
71/100

HAMMOND WATER WORKS DEPARTMENT

HAMMOND · 78,384 residents

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

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