County Water Quality Report

Marion County, Indiana

2 public water systems serving 1,756,345 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
60/100
Utilities rated 2
Population served 1,756,345
Most recent test 2024
🇪🇺 Would fail EU standards 1 of 2

Top water quality concerns in Marion County

  • Haloacetic acids (HAA9) significantly above health guidelinein 1 of 2 utilities
  • Haloacetic acids (HAA5) significantly above health guidelinein 1 of 2 utilities
  • Total trihalomethanes (TTHMs) significantly above health guidelinein 1 of 2 utilities
  • Arsenic detectedin 1 of 2 utilities
  • PFAS contaminationin 1 of 2 utilities

All utilities in Marion County

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

C
65/100

CITIZENS WATER - INDIANAPOLIS

INDIANAPOLIS · 880,345 residents

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

View report →
F
54/100

City of Indianapolis Water Department

Indianapolis · 876,000 residents

Top concern: PFAS contamination

View report →