Is Rancho Nipomo Water Company Tap Water Safe? Quality Report

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.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2007-07-01 → 2007-07-31
MR	Monitoring	Resolved	2005-07-01 → 2005-07-31
MR	Monitoring	Resolved	2005-07-01 → 2005-07-31
MR	Monitoring	Resolved	2005-07-01 → 2005-07-31
Other	Monitoring	Resolved	2005-07-01
MR	Monitoring	Resolved	1993-07-01

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Lead	0.0032 mg/L 21% of the EPA limit 0.0150 mg/L	6/6	LCR	2025
Nitrate	400 µg/L 4% of the EPA limit 10000 µg/L	6/32	SYR4	2012–2019
Fluoride	560 µg/L 14% of the EPA limit 4000 µg/L	3/3	SYR4	2012–2017
Bromodichloromethane	2.7 µg/L No EPA limit set	1/2	SYR4	2012–2017
Bromoform	4.4 µg/L No EPA limit set	1/2	SYR4	2012–2017
Dibromoacetic Acid	2.5 µg/L No EPA limit set	1/1	SYR4	2017
Dibromochloromethane	5.5 µg/L No EPA limit set	1/2	SYR4	2012–2017
Lead	7.4 µg/L 49% of the EPA limit 15 µg/L	1/3	SYR4	2012–2017
TTHM	14 µg/L 18% of the EPA limit 80 µg/L	1/2	SYR4	2012–2017
Toluene	0.6200 µg/L 0.1% of the EPA limit 1000 µg/L	1/3	SYR4	2012–2017
Total Haloacetic Acids (HAA5)	2.5 µg/L 4.2% of the EPA limit 60 µg/L	1/1	SYR4	2017

41 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicAtrazineBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDichloroacetic AcidEthylbenzeneLassoMercuryMonobromoacetic AcidMonochloroacetic AcidNitrate-NitriteNitriteSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: JANET, WOOD
Phone: 805-489-0864
Email: bwmgmt1@gmail.com

Frequently asked questions about Rancho Nipomo Water Company

Is Rancho Nipomo Water Company tap water safe to drink?

EPA monitoring detected 11 contaminants in Rancho Nipomo Water Company'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 Rancho Nipomo Water Company's water?

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

How many people does Rancho Nipomo Water Company serve?

Rancho Nipomo Water Company reports serving 44 people in California, per its EPA record.

Has Rancho Nipomo Water Company had any water quality violations?

The EPA has 6 violations on file for Rancho Nipomo Water Company, of which 0 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.