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Devore WC

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
1,574 people
Connections
480
Water source
Groundwater
Based in
Devore, CA
County
San Bernardino
Owner
Private
Hardness
Very hard
The ZIP code it serves

92407

The short answer

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

What handles it

What was found

Nitrate, uranium, fluoride, haloacetic acids (HAA5), total trihalomethanes (TTHM), arsenic and chromium (total): California’s own results, samples taken from Jan. 2, 2020 to July 14, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal2

Nitrate

Comes from the source

Above the health goal

17ppm

Highest sample; found in 907 of 921

2026 average: 7.2 ppm

From 2023 to 2026, at least 25 samples were above EPA’s legal limit of 10 ppm, the highest 17 ppm in 2025. The next sample at the same point, within 30 days, kept the average above the limit every time. 10 ppm is also EPA’s health goal. In 2026, the latest year on file, its 39 samples averaged 7.2 ppm. EPA recorded no violation for nitrate at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 16 ppm, in 2017, and EPA recorded a violation in 2017.

What handles it

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

Uranium

Comes from the source

Above the health goal

2.8ppb

Highest yearly average, 2024 to 2025

2025, one sample: 2.7 ppb

Averaged by year, the highest was 2.8 ppb, in 2024: below EPA’s legal limit of 30 ppb, but above its health goal of zero. Its highest single sample was 4.6 ppb. In 2025, the latest year on file, its one sample was 2.7 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.8 ppb, in 2013.

What handles it

Below EPA’s limits3

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.77ppm

Highest yearly average, 2021 to 2025

2025 average: 0.59 ppm

Averaged by year, the highest was 0.77 ppm, in 2022, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 1.7 ppm. In 2025, the latest year on file, its three samples averaged 0.59 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.57 ppm, in 2015.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

10.7ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 10.7 ppb, in 2020, below EPA’s legal limit of 60 ppb. Its highest single sample was 21.4 ppb. In 2026, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2019.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

6.4ppb

Highest yearly average, 2020 to 2026

2026 average: 1.3 ppb

Averaged by year, the highest was 6.4 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 27.4 ppb. In 2026, the latest year on file, its two samples averaged 1.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 4.5 ppb, in 2019.

What handles it

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

    For: Nitrate

  • NSF/ANSI 58

    Claims: Nitrate/Nitrite Reduction, Uranium

    For: Nitrate, Uranium

    Other certifiers’ wording: Nitrate

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

Very hard, typically 260 mg/L (15.2 grains per gallon), across 7 sampling points, 2021 to 2025.

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 15.2 grains per gallon, salt includedSoftener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
NitrateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJuly 1, 2017 to Sept. 30, 201716 MG/LArchived
NitrateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleApril 1, 2017 to June 30, 201716 MG/LArchived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 6 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, uranium, fluoride, haloacetic acids (HAA5), total trihalomethanes (TTHM), arsenic and chromium (total) results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Devore WC’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 Jan. 2, 2020 to July 14, 2026.

Testing your own tap

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

  • BSK Associates - San Bernardino Analytical Laboratory

    San Bernardino, CA · about 12 miles

    Certified for bacteria

    (559) 497-2888

  • Clinical Laboratory of San Bernardino, Inc.

    Grand Terrace, CA · about 13 miles

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

    (909) 825-7693

  • Geo-Monitor, Inc

    Hesperia, CA · about 17 miles

    Certified for bacteria

    (760) 244-3481

All 145 certified labs for California

Sources

PWSID CA3610117. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in San Bernardino County

All California utilities

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