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Jackson Park Naval Hospital

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
2,277 people
Connections
320
Water source
Surface water bought from another system
Based in
Silverdale, WA
County
Kitsap
Owner
Federal government
The ZIP code it serves

98312

The short answer

1 result is above EPA’s legal limit. The worst: Total trihalomethanes (TTHM), above the legal limit. 2 health-based violations since 2016.

What handles it

What was found

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Washington’s own results, samples taken from March 9, 2020 to Sept. 22, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

67ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 67 ppb, in 2026, below EPA’s legal limit of 80 ppb. Its highest single sample was 87.5 ppb. That was also the latest year on file. EPA judges this limit at each sampling point, and recorded a violation for total trihalomethanes (TTHM) at this utility in 2026. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 62.3 ppb, in 2019.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Below EPA’s limits1

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

28.4ppb

Highest yearly average, 2020 to 2026

2026 average: 26.4 ppb

Averaged by year, the highest was 28.4 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 52 ppb. In 2026, the latest year on file, its two samples averaged 26.4 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 34.2 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Lead

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2026 to June 30, 202682.1 UG/LArchived
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)July 1, 2021—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Jackson Park Naval Hospital’s own annual report, which it must send you every year, has 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 March 9, 2020 to Sept. 22, 2026.

Testing your own tap

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

  • Spectra Laboratories - Kitsap, LLC

    Poulsbo, WA · about 15 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (360) 779-5141

  • Eurofins EPK Built Environment Testing, LLC

    Seattle, WA · about 20 miles

    Certified for bacteria, asbestos

    (206) 781-0155

  • MCL Food Testing

    Seattle, WA · about 21 miles

    Certified for bacteria

    (206) 633-3637

All 84 certified labs for Washington

Sources

PWSID WA5305345. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Kitsap County

All Washington utilities

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