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North Twin Lakeview Assn

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
88 people
Connections
104
Water source
Groundwater
Based in
Port Orchard, WA
County
Ferry
Owner
Private
Hardness
Very hard
The ZIP code it serves

99138

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Lead, above the action level. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2002 to 2023.

Uranium, nitrate, fluoride, arsenic and chromium (total): Washington’s own results, samples taken from May 14, 2020 to May 26, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Lead

Comes from pipes, often your own

Above the action level

33.3ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 33.3 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.

What handles it

Above the health goal1

Uranium

Comes from the source

Above the health goal

29.5ppb

Highest yearly average, 2020 to 2022

2022, one sample: 2.6 ppb

Averaged by year, the highest was 29.5 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2022, the latest year on file, its one sample was 2.6 ppb.

What handles it

Below EPA’s limits2

Nitrate

Comes from the source

Below EPA’s limits

1.5ppm

Highest sample; found in 4 of 10

2026, one sample: 0.27 ppm

The highest sample, in 2023, was 1.5 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 0.27 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.36 ppm, in 2017.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.22ppm

Highest yearly average, 2024

Averaged by year, the highest was 0.22 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.2 ppm, in 2013.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)

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.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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

The best water filters for lead, ranked

Hardness

Very hard, 193 mg/L (11.3 grains per gallon), at its one sampling point, in 2024.

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 11.3 grains per gallon, salt includedSoftener or salt-free conditioner?Washington water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

  • Everything else. Uranium, nitrate, fluoride, arsenic and chromium (total) results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. North Twin Lakeview Assn’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 May 14, 2020 to May 26, 2026.

Testing your own tap

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

  • Lincoln County Environmental Health Lab

    Davenport, WA · about 37 miles

    Certified for bacteria

    (509) 215-1034

  • Okanogan County Public Health Laboratory

    Okanogan, WA · about 55 miles

    Certified for bacteria, nitrate

    (509) 422-7140

  • Anatek Labs, Inc - Spokane

    Spokane, WA · about 60 miles

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

    (509) 838-3999

All 84 certified labs for Washington

Sources

PWSID WA5361480. Rebuilt from EPA data on Oct. 18, 2026.

Also in Ferry County

All Washington utilities

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