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Hiapark

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
360 people
Connections
38
Water source
Groundwater
Based in
Port Orchard, WA
County
Mason
Owner
Private
The ZIP code it serves

98584

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 Aug. 17, 2020 to June 10, 2026, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from Aug. 26, 2019 to Aug. 26, 2019. Newer results are in the utility’s annual water quality report.

Below EPA’s limits1

Nitrate

Comes from the source

Below EPA’s limits

2.4ppm

Highest sample; found in 6 of 7

2026, one sample: 2.1 ppm

The highest sample, in 2024, was 2.4 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 2.1 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.4 ppm, in 2013.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Fluoride
  • Lead

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. Arsenic, chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Hiapark’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 Aug. 17, 2020 to June 10, 2026; EPA’s compliance samples are from Aug. 26, 2019 to Aug. 26, 2019.

Testing your own tap

Hiapark’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 Hiapark serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Olympic Analytical LLC dba Vanguard Laboratory

    Olympia, WA · about 12 miles

    Certified for bacteria, nitrate

    (360) 967-7010

  • Thurston County Health Department Laboratory

    Olympia, WA · about 16 miles

    Certified for bacteria, nitrate

    (360) 867-2631

  • Grays Harbor County Water Testing Lab

    Montesano, WA · about 22 miles

    Certified for bacteria, nitrate

    (360) 249-4413

All 84 certified labs for Washington

Sources

PWSID WA5303224. Rebuilt from EPA data on Oct. 18, 2026.

Also in Mason County

All Washington utilities

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