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Tap water quality report

Green River Mutual Water Co.

EPA monitoring tested this supplier for 47 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

47
contaminants tested
8
detected
350
people served
5
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground water
Ownership
Private
Counties served
San Luis Obispo

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.

5
health-based violations
17
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-17
MCL Health-based Archived 2021-10-01 → 2021-12-31
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Resolved 2005-07-01 → 2005-07-31
MCL Health-based Archived 1982-03-02 → 1983-03-01
RPT Monitoring Unaddressed 2024-10-17
MR Monitoring Resolved 2017-10-01
MR Monitoring Resolved 2017-10-01
MR Monitoring Resolved 2017-01-01 → 2017-12-31
MR Monitoring Resolved 2017-01-01 → 2017-12-31

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 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
Nitrate
4972 µg/L 50%
of the EPA limit 10000 µg/L
 36/44 SYR4 2012–2019
Selenium
84 µg/L 168%
of the EPA limit, in the worst sample — 50 µg/L
 7/7 SYR4 2014–2019
Fluoride
400 µg/L 10%
of the EPA limit 4000 µg/L
 6/6 SYR4 2014–2019
Arsenic
3 µg/L 30%
of the EPA limit 10 µg/L
 3/6 SYR4 2014–2019
Combined Uranium
18.178 µg/L 61%
of the EPA limit 30 µg/L
 3/3 SYR4 2019
Lead
0.00050 mg/L 3.3%
of the EPA limit 0.0150 mg/L
 3/3 LCR 2024
Nitrate-Nitrite
1200 µg/L 12%
of the EPA limit 10000 µg/L
 2/3 SYR4 2019
Copper
60 µg/L 4.6%
of the EPA limit 1300 µg/L
 1/6 SYR4 2014–2019
39 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalAtrazineBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDibromochloromethaneEthylbenzeneLassoLeadMercuryNitriteSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
SCOGGINS, ALLEN
Phone
805-430-5675
Email
scogginsfamily3@gmail.com

Frequently asked questions about Green River Mutual Water Co.

Is Green River Mutual Water Co. tap water safe to drink?

EPA monitoring detected 8 contaminants in Green River 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 Green River Mutual Water Co.'s water?

EPA monitoring detected Nitrate, Selenium, Fluoride, Arsenic, Combined Uranium, and others. The full list with the level and data source for each is above.

How many people does Green River Mutual Water Co. serve?

Green River Mutual Water Co. reports serving 350 people in California, per its EPA record.

Has Green River Mutual Water Co. had any water quality violations?

The EPA has 17 violations on file for Green River Mutual Water Co., of which 5 are 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.