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Lake Elizabeth Mutual Water Co.

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
1,790 people
Connections
734
Water source
Surface water bought from another system
Based in
Elizabeth Lake, CA
County
Los Angeles
Owner
Private
Hardness
Varies by source
The ZIP code it serves

93532

The short answer

2 results are above the health goal. The worst: Arsenic, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Arsenic, uranium, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride and chromium (total): California’s own results, samples taken from Feb. 5, 2020 to June 1, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal2

Arsenic

Comes from the source

Above the health goal

5.0ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 5.0 ppb, in 2021: below EPA’s legal limit of 10 ppb, but above its health goal of zero. 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 3.5 ppb, in 2014.

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

5.0ppb

Highest yearly average, 2020 to 2026

2026, one sample: 3.2 ppb

Averaged by year, the highest was 5.0 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2026, the latest year on file, its one sample was 3.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 8.3 ppb, in 2012.

What handles it

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

8.0ppm

Highest sample; found in 25 of 40

2026 average: 3.7 ppm

The highest sample, in 2024, was 8.0 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its three samples averaged 3.7 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 5.0 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

39.8ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 39.8 ppb, in 2026, below EPA’s legal limit of 60 ppb. Its highest single sample was 72 ppb. That was also the latest year on file. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 34.1 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

41.2ppb

Highest yearly average, 2020 to 2026

2026 average: 30.3 ppb

Averaged by year, the highest was 41.2 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 86 ppb. In 2026, the latest year on file, its six samples averaged 30.3 ppb. EPA recorded no violation for total trihalomethanes (TTHM) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 63.1 ppb, in 2015, and EPA recorded a violation 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

0.5ppm

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 0.5 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.7 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.55 ppm, in 2015.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

6.5ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 6.5 ppb, in 2024, below EPA’s legal limit of 100 ppb. Its highest single sample was 13 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 3.0 ppb, in 2015.

What handles it

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

Hardness

Moderately hard to very hard depending on the source, 79 to 233 mg/L (4.6 to 13.6 grains per gallon), across 3 sampling points, 2019 to 2026.

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, salt includedSoftener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2018 to June 30, 20180.082 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 1 monitoring or reporting violation not shown.

What this report can’t tell you

  • Everything else. Arsenic, uranium, nitrate, haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride and chromium (total) results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Lake Elizabeth Mutual Water Co.’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; California’s results run from Feb. 5, 2020 to June 1, 2026.

Testing your own tap

Lake Elizabeth Mutual Water Co.’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 Lake Elizabeth Mutual Water Co. serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pat-Chem Laboratories

    San Fernando, CA · about 28 miles

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

    (800) 400-5227

  • Fruit Growers Laboratory, Inc.

    Santa Paula, CA · about 40 miles

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

    (805) 392-2000

  • EMSL Analytical, Inc. (LA Testing)

    South Pasadena, CA · about 45 miles

    Certified for bacteria, asbestos

    (323) 254-9960

All 145 certified labs for California

Sources

PWSID CA1910056. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Los Angeles County

All California utilities

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