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Tap water quality report

West Water Company (Puc)

EPA monitoring tested this supplier for 72 contaminants and detected 10. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

72
contaminants tested
10
detected
40
people served
6
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
Sonoma

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.

6
health-based violations
28
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-03-01 → 2010-03-31
MCL Health-based Resolved 2010-03-01 → 2010-03-31
MCL Health-based Resolved 1999-11-01 → 1999-11-30
MCL Health-based Resolved 1999-11-01 → 1999-11-30
MCL Health-based Resolved 1996-07-01 → 1996-07-31
MCL Health-based Resolved 1996-07-01 → 1996-07-31
Other Monitoring Archived 2019-01-01 → 2019-03-31
MR Monitoring Resolved 2009-06-01
MR Monitoring Resolved 2009-06-01
MR Monitoring Resolved 2009-05-01 → 2009-05-31

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2025
Nitrate
2100 µg/L 21%
of the EPA limit 10000 µg/L
 10/14 SYR4 2013–2019
Bromodichloromethane
4.23 µg/L
No EPA limit set
 8/8 SYR4 2013–2019
Chloroform
10.47 µg/L
No EPA limit set
 8/8 SYR4 2013–2019
Dichloroacetic Acid
3.8 µg/L
No EPA limit set
 8/8 SYR4 2013–2019
TTHM
16 µg/L 20%
of the EPA limit 80 µg/L
 8/8 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
8.3 µg/L 14%
of the EPA limit 60 µg/L
 8/8 SYR4 2013–2019
Trichloroacetic Acid
4.5 µg/L
No EPA limit set
 8/8 SYR4 2013–2019
Dibromochloromethane
2.47 µg/L
No EPA limit set
 4/8 SYR4 2013–2019
Barium
100 µg/L 5%
of the EPA limit 2000 µg/L
 1/1 SYR4 2012
62 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBeryllium, TotalBromoformChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDibromoacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MORELLI, GLENN
Phone
707-565-7947
Email
glenn.morelli@sonomacounty.gov

Frequently asked questions about West Water Company (Puc)

Is West Water Company (Puc) tap water safe to drink?

EPA monitoring detected 10 contaminants in West Water Company (Puc)'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 West Water Company (Puc)'s water?

EPA monitoring detected Lead, Nitrate, Bromodichloromethane, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does West Water Company (Puc) serve?

West Water Company (Puc) reports serving 40 people in California, per its EPA record.

Has West Water Company (Puc) had any water quality violations?

The EPA has 28 violations on file for West Water Company (Puc), of which 6 are health-based (a contaminant limit or required treatment was breached) and 0 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.