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Trinity Village Mutual Water

What EPA’s and California’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
330 people
Connections
193
Water source
Surface water
Based in
Salyer, CA
County
Trinity
Owner
Private
The 2 ZIP codes it serves

95527, 95563

The short answer

1 result is above the health goal. The worst: Lead, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2003 to 2023.

Total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate: California’s own results, samples taken from Aug. 14, 2020 to Sept. 25, 2025, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from Sept. 7, 2017 to Sept. 7, 2017. Newer results are in the utility’s annual water quality report.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

2.0ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 2.0 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 limits3

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

38ppb

Highest yearly average, 2020 to 2025

Averaged by year, the highest was 38 ppb, in 2025, below EPA’s legal limit of 80 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 39 ppb, in 2019.

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

Below EPA’s limits

26ppb

Highest yearly average, 2020 to 2025

2025, one sample: 9.5 ppb

Averaged by year, the highest was 26 ppb, in 2024, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its one sample was 9.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 32 ppb, in 2019.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

0.1ppm

Highest sample; found in 1 of 6

2024 average: 0.05 ppm

The highest sample, in 2024, was 0.1 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its two samples averaged 0.05 ppm.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Fluoride

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

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Stage 1 Disinfectants and Disinfection Byproducts RuleTreatment was not run by a certified operator as required.EPA: Treatment Technique No Certif. OperatorFeb. 1, 2020—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), haloacetic acids (HAA5) and nitrate results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Arsenic, chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Trinity Village Mutual Water’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; California’s results run from Aug. 14, 2020 to Sept. 25, 2025; EPA’s compliance samples are from Sept. 7, 2017 to Sept. 7, 2017.

Testing your own tap

Trinity Village Mutual 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 California certifies.

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

  • Microbac Laboratories, Inc. - Arcata

    Arcata, CA · about 33 miles

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

    (707) 822-4649

  • Humboldt County Public Health Laboratory

    Eureka, CA · about 39 miles

    Certified for bacteria

    (707) 268-2179

  • Pace Analytical Services, LLC - Redding

    Redding, CA · about 61 miles

    Certified for bacteria

    (530) 999-4051

All 145 certified labs for California

Sources

PWSID CA5304102. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Trinity County

All California utilities

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