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Silver Lake Water

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
425 people
Connections
244
Water source
Groundwater
Based in
Freeland, WA
County
Island
Owner
Private
Hardness
Hard
The ZIP code it serves

98277

The short answer

2 results are 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), haloacetic acids (HAA5), fluoride, chromium (total), arsenic and nitrate: Washington’s own results, samples taken from Jan. 13, 2020 to July 6, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

87.2ppb

Highest yearly average, 2020 to 2026

2026 average: 81.2 ppb

Averaged by year, the highest was 87.2 ppb, in 2023, above EPA’s legal limit of 80 ppb. Its highest single sample was 133 ppb. In 2026, the latest year on file, its three samples averaged 81.2 ppb, above the limit. EPA 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 85.8 ppb, in 2017.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the legal limit

57.9ppb

Highest yearly average, 2020 to 2026

2026 average: 52.1 ppb

Averaged by year, the highest was 57.9 ppb, in 2025, below EPA’s legal limit of 60 ppb. Its highest single sample was 103 ppb. In 2026, the latest year on file, its three samples averaged 52.1 ppb. EPA judges this limit at each sampling point, and recorded a violation for haloacetic acids (HAA5) at this utility in 2026. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 44.5 ppb, in 2013.

What handles it

No certification claim covers this compound yet.

Below EPA’s limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.15ppm

Highest yearly average, 2021

Averaged by year, the highest was 0.15 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. That is the only year on file.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

1.9ppb

Highest yearly average, 2021

Averaged by year, the highest was 1.9 ppb, in 2021, below EPA’s legal limit of 100 ppb. That is the only year on file.

What handles it

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

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

Hardness

Hard, 157 mg/L (9.2 grains per gallon), at its one sampling point, in 2021.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 9.2 grains per gallon, salt includedSoftener or salt-free conditioner?Washington water hardness, utility by utility

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, 202687.5 UG/LArchived
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2026 to June 30, 202660.5 UG/LArchived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 6 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total), arsenic and nitrate results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Silver Lake Water’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 Jan. 13, 2020 to July 6, 2026.

Testing your own tap

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

  • Eurofins DW and WW West, Washington Laboratory

    Burlington, WA · about 18 miles

    Certified for bacteria, nitrate, minerals and other inorganics, disinfection byproducts

    (360) 757-1400

  • Precision Analytical Laboratories, LLC

    Everett, WA · about 29 miles

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

    (425) 740-4597

  • Everett Environmental Laboratory

    Everett, WA · about 31 miles

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

    (425) 257-8230

All 84 certified labs for Washington

Sources

PWSID WA5379245. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Island County

All Washington utilities

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