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Volcano Community Service Dist

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
103 people
Connections
73
Water source
Groundwater influenced by surface water
Based in
Volcano, CA
County
Amador
Owner
Local government
Hardness
Varies by source
The ZIP code it serves

95689

The short answer

Nothing in EPA’s and California’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Nitrate, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride, arsenic and uranium: California’s own results, samples taken from Jan. 22, 2020 to June 2, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

1.3ppm

Highest sample; found in 10 of 21

2026, one sample: 0.68 ppm

The highest sample, in 2025, was 1.3 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 0.68 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 3.2 ppm, in 2016.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

12ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 12 ppb, in 2025, below EPA’s legal limit of 100 ppb. Its highest single sample was 24 ppb. In 2026, the latest year on file, it wasn’t found in its one sample.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

4.7ppb

Highest yearly average, 2020 to 2025

Averaged by year, the highest was 4.7 ppb, in 2025, below EPA’s legal limit of 60 ppb. Its highest single sample was 7.6 ppb. That was also the latest year on file.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

4.5ppb

Highest yearly average, 2020 to 2025

2025 average: 2.1 ppb

Averaged by year, the highest was 4.5 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 9.1 ppb. In 2025, the latest year on file, its two samples averaged 2.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.1 ppb, in 2015.

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

0.16ppm

Highest yearly average, 2020 to 2026

2026, one sample: 0.13 ppm

Averaged by year, the highest was 0.16 ppm, in 2025, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.18 ppm. In 2026, the latest year on file, its one sample was 0.13 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.12 ppm, in 2019.

What handles it

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Lead
  • Uranium

Hardness

Moderately hard to very hard depending on the source, 69 to 181 mg/L (4 to 10.6 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

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. Nitrate, chromium (total), haloacetic acids (HAA5), total trihalomethanes (TTHM), fluoride, arsenic and uranium results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Volcano Community Service Dist’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. 22, 2020 to June 2, 2026.

Testing your own tap

Volcano Community Service Dist’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 Volcano Community Service Dist serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • 49er Water Laboratory

    Jackson, CA · about 12 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (530) 277-2770

  • Ceres Analytical Laboratory, Inc.

    El Dorado Hills, CA · about 27 miles

    Certified for organic chemicals

    (916) 932-5011

  • Onterris Laboratories, LLC

    El Dorado Hills, CA · about 27 miles

    Certified for organic chemicals, PFAS

    (916) 673-1520

All 145 certified labs for California

Sources

PWSID CA0300016. Rebuilt from EPA data on Oct. 18, 2026.

Nearby

All California utilities

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