Is Rancho Colorado Ws Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Tehama

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
RPT	Monitoring	Unaddressed	2025-07-02
MR	Monitoring	Addressed	2023-10-01
MR	Monitoring	Resolved	1993-07-01 → 2003-12-31
Other	Monitoring	Archived	1984-08-01 → 1984-08-31
Other	Monitoring	Archived	1984-07-01 → 1984-07-31
Other	Monitoring	Archived	1984-05-01 → 1984-05-31
Other	Monitoring	Archived	1984-04-01 → 1984-04-30
Other	Monitoring	Archived	1983-07-01 → 1983-07-31
Other	Monitoring	Archived	1983-02-01 → 1983-02-28
Other	Monitoring	Archived	1982-12-01 → 1982-12-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	1100 µg/L 11% of the EPA limit 10000 µg/L	18/18	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	4/4	LCR	2026
Fluoride	200 µg/L 5% of the EPA limit 4000 µg/L	1/1	SYR4	2018
Nitrate-Nitrite	1000 µg/L 10% of the EPA limit 10000 µg/L	1/1	SYR4	2018

41 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4-DAntimony, TotalArsenicBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDibromochloromethaneEthylbenzeneGlyphosateLeadMercuryNitriteSeleniumSimazineStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: PAUL, JOSHUA
Phone: 530-736-6248
Email: [email protected]

Frequently asked questions about Rancho Colorado Ws

Is Rancho Colorado Ws tap water safe to drink?

EPA monitoring detected 4 contaminants in Rancho Colorado Ws'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 Colorado Ws's water?

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

How many people does Rancho Colorado Ws serve?

Rancho Colorado Ws reports serving 36 people in California, per its EPA record.

Has Rancho Colorado Ws had any water quality violations?

The EPA has 12 violations on file for Rancho Colorado Ws, of which 0 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.