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Alpine Acres Mutual Water Co

EPA monitoring tested this supplier for 44 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

44
contaminants tested
8
detected
195
people served
1
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Tuolumne

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

1
health-based violations
17
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Addressed 2024-10-17
MON Monitoring Resolved 2025-04-01 → 2025-04-30
MON Monitoring Resolved 2025-04-01 → 2025-04-30
RPT Monitoring Addressed 2024-10-17
MR Monitoring Archived 2024-01-01 → 2024-12-31
MR Monitoring Resolved 2019-01-01 → 2019-12-31
MR Monitoring Resolved 2019-01-01 → 2019-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31
MR Monitoring Resolved 2001-01-01 → 2001-12-31

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
2650 µg/L 27%
of the EPA limit 10000 µg/L
 10/16 SYR4 2012–2018
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2024
Fluoride
156.2 µg/L 3.9%
of the EPA limit 4000 µg/L
worst single sample: 158 µg/L
3/3 SYR4 2013–2017
Chromium
17.695 µg/L 18%
of the EPA limit 100 µg/L
worst single sample: 18 µg/L
2/3 SYR4 2013–2017
Barium
50.1 µg/L 2.5%
of the EPA limit 2000 µg/L
 1/3 SYR4 2013–2017
Combined Uranium
3.9187 µg/L 13%
of the EPA limit 30 µg/L
 1/1 SYR4 2013
Dichloromethane
10.5 µg/L 210%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
 1/1 SYR4 2017
Nitrate-Nitrite
890 µg/L 8.9%
of the EPA limit 10000 µg/L
 1/2 SYR4 2013–2016
36 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicAsbestosAtrazineBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbon TetrachlorideEthylene DibromideEthylbenzeneLassoLeadMercuryNitriteSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SERPA, DANA
Phone
209-450-5667
Email
danaserpa@yahoo.com

Frequently asked questions about Alpine Acres Mutual Water Co

Is Alpine Acres Mutual Water Co tap water safe to drink?

EPA monitoring detected 8 contaminants in Alpine Acres Mutual Water Co's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Alpine Acres Mutual Water Co's water?

EPA monitoring detected Nitrate, Lead, Fluoride, Chromium, Barium, and others. The full list with the level and data source for each is above.

How many people does Alpine Acres Mutual Water Co serve?

Alpine Acres Mutual Water Co reports serving 195 people in California, per its EPA record.

Has Alpine Acres Mutual Water Co had any water quality violations?

The EPA has 17 violations on file for Alpine Acres Mutual Water Co, of which 1 is health-based (a contaminant limit or required treatment was breached) and 2 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.