Skip to content
TapBuff
ZIP

Interlachen Water PUD

What EPA’s and CDC’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
155
Water source
Groundwater
Based in
Fairview, OR
County
Multnomah
Owner
Local government
The ZIP code it serves

97024

The short answer

2 results are above the health goal. The worst: Arsenic, above the health goal. 3 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1998 to 2024.

Nitrate: Oregon’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Arsenic and uranium: EPA’s compliance monitoring file, samples taken from Sept. 30, 2013 to Nov. 15, 2013. Newer results are in the utility’s annual water quality report.

Above the health goal2

Arsenic

Comes from the source

Above the health goal

1.4ppb

Highest yearly average, 2013

Averaged by year, the highest was 1.4 ppb, in 2013: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 2.8 ppb. That is the only year on file.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Lead

Comes from pipes, often your own

Above the health goal

1.6ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 1.6 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits1

Nitrate

Comes from the source

Below EPA’s limits

0.49ppm

Highest yearly average, 2020 to 2023

2023 average: 0.19 ppm

Averaged by year, the highest was 0.49 ppm, in 2020, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it averaged 0.19 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.8 ppm, in 2012.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Uranium

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

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Arsenic, Lead

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Arsenic, Lead

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

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 reverse osmosis systems, ranked

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Di(2-ethylhexyl) phthalateThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2023 to March 31, 20230.03 MG/LResolved
Di(2-ethylhexyl) phthalateThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2022 to Dec. 31, 20220.045 MG/LResolved
Di(2-ethylhexyl) phthalateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJuly 1, 2022 to Sept. 30, 20220.045 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 37 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate results here are Oregon’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Arsenic and uranium come from EPA’s file alone, which ends in 2019. Interlachen Water PUD’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; CDC’s yearly averages for Oregon cover 2020 to 2023; EPA’s compliance samples are from Sept. 30, 2013 to Nov. 15, 2013.

Testing your own tap

Interlachen Water PUD’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 Oregon certifies.

The 3 labs Oregon certifies closest to the area Interlachen Water PUD serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Columbia Laboratories Inc.

    Portland, OR · about 3 miles

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

    (503) 254-1794

  • Rose City Laboratories

    Portland, OR · about 9 miles

    Certified for bacteria, nitrate, lead and copper, metals, PFAS

    (503) 307-0096

  • Clackamas River Water Drinking Water Quality Laboratory

    Clackamas, OR · about 10 miles

    Certified for bacteria

    (503) 722-9241

Oregon State University Extension Well Water Program: Nitrate screening of well water at many of its groundwater education events. The screening is free. Water Testing Guidance for Private Wells, OSU Well Water Program.

All 91 certified labs for Oregon

Sources

PWSID OR4100902. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Multnomah County

All Oregon utilities

What to do next