County Water Quality Report

Polk County, Iowa

4 public water systems serving 610,221 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
62/100
Utilities rated 4
Population served 610,221
Most recent test 2024

Top water quality concerns in Polk County

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

All utilities in Polk County

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

C
65/100

ANKENY, CITY OF

ANKENY · 76,207 residents

Top concern: Total trihalomethanes (TTHMs) significantly above health guideline

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C
65/100

DES MOINES WATER WORKS

DES MOINES · 246,055 residents

Top concern: Total trihalomethanes (TTHMs) significantly above health guideline

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D
63/100

Des Moines Municipal Water System

Des Moines · 214,000 residents

Top concern: Lead detected in source water

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D
55/100

WEST DES MOINES WATER WORKS

WEST DES MOINES · 73,959 residents

Top concern: PFAS contamination

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