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Trailer Haven Mobile Home Park

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
459 people
Connections
191
Water source
Surface water bought from another system
Based in
Sacramento, CA
County
Alameda
Owner
Private
Hardness
Very hard
The ZIP code it serves

94577

The short answer

3 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

Lead and copper: EPA SDWIS monitoring periods ending 2004 to 2024.

Uranium, nitrate, haloacetic acids (HAA5) and total trihalomethanes (TTHM): California’s own results, samples taken from June 15, 2020 to Dec. 17, 2025, with EPA’s 2012 to 2019 file for earlier years.

Arsenic, fluoride and chromium (total): EPA’s compliance monitoring file, samples taken from July 14, 2015 to Feb. 26, 2019. Newer results are in the utility’s annual water quality report.

Above the health goal3

Arsenic

Comes from the source

Above the health goal

2.3ppb

Highest yearly average, 2015 to 2019

2019: not found

Averaged by year, the highest was 2.3 ppb, in 2015: below EPA’s legal limit of 10 ppb, but above its health goal of zero. In 2019, the latest year on file, it wasn’t found in its one sample.

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

2.7ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 2.7 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

Uranium

Comes from the source

Above the health goal

1.0ppb

Highest yearly average, 2022

Averaged by year, the highest was 1.0 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

4.6ppm

Highest sample; found in 7 of 7

2025 average: 3.1 ppm

The highest sample, in 2021, was 4.6 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its two samples averaged 3.1 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 4.3 ppm, in 2012.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

5.4ppb

Highest yearly average, 2020 to 2025

2025: not found

Averaged by year, the highest was 5.4 ppb, in 2020, below EPA’s legal limit of 60 ppb. In 2025, 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 6.8 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

5.9ppb

Highest yearly average, 2020 to 2025

2025, one sample: 1.7 ppb

Averaged by year, the highest was 5.9 ppb, in 2020, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 1.7 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 20 ppb, in 2018.

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

0.2ppm

Highest yearly average, 2015 to 2019

Averaged by year, the highest was 0.2 ppm, in 2019, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file.

What handles it

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • 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.”

  • 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, Uranium

    For: Arsenic, Lead, Uranium

    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

Hardness

Very hard, 290 mg/L (17 grains per gallon), at its one sampling point, in 2019.

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 17 grains per gallon, salt includedSoftener or salt-free conditioner?California 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, haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are California’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. Trailer Haven Mobile Home Park’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 June 15, 2020 to Dec. 17, 2025; EPA’s compliance samples are from July 14, 2015 to Feb. 26, 2019.

Testing your own tap

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

  • EMSL Analytical Inc.

    San Leandro, CA · about 2 miles

    Certified for asbestos

    (510) 895-3675

  • SGS North America

    Hayward, CA · about 6 miles

    Certified for bacteria

    (510) 266-8183

  • Eurofins Built Environment Testing West, LLC

    Emeryville, CA · about 11 miles

    Certified for lead and copper

    (510) 653-0824

All 145 certified labs for California

Sources

PWSID CA0103041. Rebuilt from EPA data on Oct. 18, 2026.

Also in Alameda County

All California utilities

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