Is Green Gulch Farm Tap Water Safe? Quality Report

Water source: Ground water under surface influence
Ownership: Private
Counties served: Marin

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
TT	Health-based	Unaddressed	2024-10-17
RPT	Monitoring	Unaddressed	2024-10-17
MR	Monitoring	Resolved	1993-07-01 → 2003-12-31
Other	Monitoring	Archived	1984-09-01 → 1984-09-30
Other	Monitoring	Archived	1984-08-01 → 1984-08-31
MR	Monitoring	Archived	1981-10-01 → 1982-09-30

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	13/13	LCR	2023
Nitrate	1175.2 µg/L 12% of the EPA limit 10000 µg/L	12/32	SYR4	2012–2019
Fluoride	485.5 µg/L 12% of the EPA limit 4000 µg/L worst single sample: 490 µg/L	10/10	SYR4	2012–2019
Bromoform	15.27 µg/L No EPA limit set worst single sample: 18 µg/L	7/10	SYR4	2012–2019
Dibromoacetic Acid	4.946 µg/L No EPA limit set worst single sample: 5.39 µg/L	7/7	SYR4	2012–2019
Dibromochloromethane	4.85 µg/L No EPA limit set worst single sample: 5.6 µg/L	7/10	SYR4	2012–2019
TTHM	21.4 µg/L 27% of the EPA limit 80 µg/L worst single sample: 25 µg/L	7/10	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	5.102 µg/L 8.5% of the EPA limit 60 µg/L worst single sample: 5.39 µg/L	7/7	SYR4	2012–2019
Bromodichloromethane	0.9400 µg/L No EPA limit set worst single sample: 1 µg/L	4/10	SYR4	2012–2019
Barium	200 µg/L 10% of the EPA limit 2000 µg/L	3/9	SYR4	2012–2019
Monochloroacetic Acid	2.79 µg/L No EPA limit set worst single sample: 2.8 µg/L	2/7	SYR4	2012–2019

53 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicBhc-GammaBenzeneBeryllium, TotalChlorobenzeneCopperCadmiumCarbofuranCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: BLANK, STEPHANIE
Phone: 415-942-2542
Email: Stephanie [email protected]

Frequently asked questions about Green Gulch Farm

Is Green Gulch Farm tap water safe to drink?

EPA monitoring detected 11 contaminants in Green Gulch Farm'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 Gulch Farm's water?

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

How many people does Green Gulch Farm serve?

Green Gulch Farm reports serving 75 people in California, per its EPA record.

Has Green Gulch Farm had any water quality violations?

The EPA has 6 violations on file for Green Gulch Farm, 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.