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King County Water District #117

What EPA’s and Washington’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves
95 people
Connections
40
Water source
Groundwater
Based in
Port Orchard, WA
County
King
Owner
Local government
The ZIP code it serves

98006

The short answer

Nothing in EPA’s and Washington’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Nitrate: Washington’s own results, samples taken from June 1, 2020 to June 20, 2025.

Chromium (total), arsenic and fluoride: EPA’s compliance monitoring file, samples taken from June 10, 2015 to June 10, 2015. Newer results are in the utility’s annual water quality report.

Below EPA’s limits1

Chromium (total)

Comes from the source

Below EPA’s limits

1.7ppb

Highest yearly average, 2015

Averaged by year, the highest was 1.7 ppb, in 2015, below EPA’s legal limit of 100 ppb. That is the only year on file.

What handles it

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Fluoride
  • Lead
  • Nitrate

Violations since 2016

No health-based violations on file with EPA since 2016. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Chromium (total), arsenic and fluoride come from EPA’s file alone, which ends in 2019. King County Water District #117’s own annual report, which it must send you every year, has newer results for those and the contaminants this page does not show.

  • Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.

  • What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.

  • Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Washington’s results run from June 1, 2020 to June 20, 2025; EPA’s compliance samples are from June 10, 2015 to June 10, 2015.

Testing your own tap

King County Water District #117’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Washington certifies.

The 3 labs Washington certifies closest to the area King County Water District #117 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • AmTest Laboratories

    Renton, WA · about 7 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, disinfection byproducts

    (425) 885-1664

  • Friedman & Bruya, Inc.

    Seattle, WA · about 7 miles

    Certified for lead and copper, metals

    (800) 487-8231

  • Analytical Resources, LLC

    Tukwila, WA · about 8 miles

    Certified for nitrate, lead and copper, metals, minerals and other inorganics

    (206) 695-6200

All 84 certified labs for Washington

Sources

PWSID WA5341980. Rebuilt from EPA data on Oct. 18, 2026.

Also in King County

All Washington utilities

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