County Water Quality Report

Johnson County, Kansas

2 public water systems serving 633,014 residents

Data sources: EPA SDWIS EPA ECHO EWG Tap Water Database Utility CCRs ⓘ How did we get these ratings?
County average grade
D
66/100
Utilities rated 2
Population served 633,014
🇪🇺 Would fail EU standards 1 of 2

Top water quality concerns in Johnson 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 2 of 2 utilities
  • Arsenic detectedin 2 of 2 utilities

All utilities in Johnson County

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

C
67/100

WATER DISTRICT 1 OF JOHNSON CO

KANSAS CITY · 490,000 residents

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

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C
65/100

OLATHE, CITY OF

OLATHE · 143,014 residents

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

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