County Water Quality Report

Thurston County, Washington

2 public water systems serving 232,144 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 2
Population served 232,144

Top water quality concerns in Thurston County

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

All utilities in Thurston County

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

C
68/100

LACEY WATER DEPARTMENT

Lacey · 105,178 residents

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

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D
56/100

OLYMPIA CITY OF

OLYMPIA · 126,966 residents

Top concern: PFAS contamination

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