Is Corral Hollow Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: San Joaquin

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
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
MCL	Health-based	Resolved	2013-10-01 → 2013-12-31
Other	Monitoring	Resolved	2008-07-01
Other	Monitoring	Resolved	2002-07-01
Other	Monitoring	Archived	1983-07-01 → 1983-07-31
Other	Monitoring	Archived	1982-10-01 → 1982-10-31
MR	Monitoring	Archived	1981-10-01 → 1982-09-30
MR	Monitoring	Archived	1980-10-30 → 1981-10-29

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
Nitrate	11774.6 µg/L 118% of the EPA limit, in the worst sample — 10000 µg/L	72/72	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	6/6	LCR	2024
Arsenic	3 µg/L 30% of the EPA limit 10 µg/L	3/4	SYR4	2014–2017
Barium	54 µg/L 2.7% of the EPA limit 2000 µg/L	2/4	SYR4	2014–2017
Chromium	4 µg/L 4% of the EPA limit 100 µg/L	2/4	SYR4	2014–2017
Selenium	3 µg/L 6% of the EPA limit 50 µg/L	2/4	SYR4	2014–2017
Combined Uranium	5.4832 µg/L 18% of the EPA limit 30 µg/L	1/1	SYR4	2017
Fluoride	100 µg/L 2.5% of the EPA limit 4000 µg/L	1/4	SYR4	2014–2017
Mercury	0.0700 µg/L 3.5% of the EPA limit 2 µg/L	1/4	SYR4	2014–2017
Nitrate-Nitrite	5100 µg/L 51% of the EPA limit 10000 µg/L	1/1	SYR4	2017

35 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCadmiumCarbon TetrachlorideChloroformDichloromethaneDibromochloromethaneEthylene DibromideEthylbenzeneLeadNitriteStyreneTTHMTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: MAINTENANCE DIST, SJC UTILITIES
Phone: 209-468-3090
Email: cirons@sjgov.org

Frequently asked questions about Corral Hollow

Is Corral Hollow tap water safe to drink?

EPA monitoring detected 10 contaminants in Corral Hollow'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 Corral Hollow's water?

EPA monitoring detected Nitrate, Lead, Arsenic, Barium, Chromium, and others. The full list with the level and data source for each is above.

How many people does Corral Hollow serve?

Corral Hollow reports serving 145 people in California, per its EPA record.

Has Corral Hollow had any water quality violations?

The EPA has 8 violations on file for Corral Hollow, of which 2 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.