Is Elkhorn Estates Water 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
Other	Monitoring	Resolved	2008-07-01
Other	Monitoring	Resolved	2002-07-01
Other	Monitoring	Resolved	2002-07-01
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	5100 µg/L 51% of the EPA limit 10000 µg/L	38/38	SYR4	2012–2019
Combined Uranium	27.565 µg/L 92% of the EPA limit 30 µg/L	19/19	SYR4	2013–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	7/7	LCR	2024
Arsenic	4 µg/L 40% of the EPA limit 10 µg/L	5/5	SYR4	2012–2018
Barium	328 µg/L 16% of the EPA limit 2000 µg/L	5/5	SYR4	2012–2018
Chromium	7 µg/L 7% of the EPA limit 100 µg/L	3/5	SYR4	2012–2018
Selenium	3 µg/L 6% of the EPA limit 50 µg/L	3/5	SYR4	2012–2018
Nitrate-Nitrite	4600 µg/L 46% of the EPA limit 10000 µg/L	2/2	SYR4	2017–2018
1,2-DIBROMO-3-CHLOROPROPANE	0.0400 µg/L 20% of the EPA limit 0.2000 µg/L	1/7	SYR4	2012–2019
Copper	40 µg/L 3.1% of the EPA limit 1300 µg/L	1/5	SYR4	2012–2018
Lead	5.5 µg/L 37% of the EPA limit 15 µg/L	1/5	SYR4	2012–2018

29 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalBenzeneBeryllium, TotalChlorobenzeneCadmiumCarbon TetrachlorideDichloromethaneEthylene DibromideEthylbenzeneFluorideMercuryNitriteStyreneTetrachloroethyleneThallium, 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 Elkhorn Estates Water

Is Elkhorn Estates Water tap water safe to drink?

EPA monitoring detected 11 contaminants in Elkhorn Estates Water'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 Elkhorn Estates Water's water?

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

How many people does Elkhorn Estates Water serve?

Elkhorn Estates Water reports serving 234 people in California, per its EPA record.

Has Elkhorn Estates Water had any water quality violations?

The EPA has 5 violations on file for Elkhorn Estates Water, 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.