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McAulays Home Sites

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
58 people
Connections
23
Water source
Groundwater
Based in
Yakima, WA
County
Yakima
Owner
Private
The ZIP code it serves

98901

The short answer

2 results are above the health goal. The worst: Arsenic, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Uranium, nitrate, total trihalomethanes (TTHM) and haloacetic acids (HAA5): Washington’s own results, samples taken from June 2, 2020 to June 2, 2026, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, fluoride and chromium (total): EPA’s compliance monitoring file, samples taken from May 2, 2019 to May 2, 2019. Newer results are in the utility’s annual water quality report.

Above the health goal2

Arsenic

Comes from the source

Above the health goal

3.3ppb

Highest yearly average, 2019

Averaged by year, the highest was 3.3 ppb, in 2019: below EPA’s legal limit of 10 ppb, but above its health goal of zero. 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”

Uranium

Comes from the source

Above the health goal

0.4ppb

Highest yearly average, 2022

Averaged by year, the highest was 0.4 ppb, in 2022: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file.

What handles it

Below EPA’s limits4

Nitrate

Comes from the source

Below EPA’s limits

1.3ppm

Highest sample; found in 6 of 6

2025, one sample: 1.3 ppm

The highest sample, in 2021, was 1.3 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its one sample was 1.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 3.8 ppm, in 2014.

What handles it

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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

3.7ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 3.7 ppb, in 2020, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.9 ppb, in 2016.

What handles it

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

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.12ppm

Highest yearly average, 2019

Averaged by year, the highest was 0.12 ppm, in 2019, below EPA’s legal limit of 4.0 ppm. That is the only year on file.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.0ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 1.0 ppb, in 2020, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, it wasn’t found in its one sample.

What handles it

No certification claim covers this compound yet.

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • 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: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

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

  • NSF/ANSI 58

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

    For: Arsenic, Uranium

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

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

The best reverse osmosis systems, ranked

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. Uranium, nitrate, 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. Arsenic, fluoride and chromium (total) come from EPA’s file alone, which ends in 2019. McAulays Home Sites’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 June 2, 2020 to June 2, 2026; EPA’s compliance samples are from May 2, 2019 to May 2, 2019.

Testing your own tap

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

  • Anatek Labs, Inc. - Yakima

    Yakima, WA · about 17 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (509) 225-9404

  • LabTest

    Yakima, WA · about 17 miles

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

    (509) 469-8378

  • Ag Health Laboratories, Inc.

    Sunnyside, WA · about 40 miles

    Certified for bacteria, nitrate

    (509) 836-2020

All 84 certified labs for Washington

Sources

PWSID WA5352154. Rebuilt from EPA data on Oct. 18, 2026.

Also in Yakima County

All Washington utilities

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