Is La Jolla Western Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Native American

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	2001-04-01 → 2001-04-30
MCL	Health-based	Resolved	2000-09-01 → 2000-09-30
MCL	Health-based	Resolved	2000-08-01 → 2000-08-31
MR	Monitoring	Resolved	2023-10-01
MON	Monitoring	Resolved	2022-06-01 → 2022-06-30
MR	Monitoring	Resolved	2022-04-01 → 2022-06-30
MR	Monitoring	Resolved	2011-01-01 → 2011-12-31
MR	Monitoring	Resolved	2009-12-01 → 2009-12-31
MR	Monitoring	Resolved	2006-01-01 → 2006-12-31
MR	Monitoring	Resolved	2006-01-01 → 2006-12-31

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
Lead	0.0050 mg/L 33% of the EPA limit 0.0150 mg/L	6/6	LCR	2025
TTHM	10.9 µg/L 14% of the EPA limit 80 µg/L worst single sample: 11 µg/L	3/3	SYR4	2012–2017
Total Haloacetic Acids (HAA5)	8.294 µg/L 14% of the EPA limit 60 µg/L worst single sample: 8.52 µg/L	3/5	SYR4	2012–2017
Dichloromethane	2.3 µg/L 46% of the EPA limit 5 µg/L	1/4	SYR4	2014–2018

36 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-DichloropropaneAntimony, TotalArsenicBariumBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumCombined Radium (-226 And -228)Combined UraniumEthylbenzeneFluorideGross Alpha, Excl. Radon And UMercuryNitrateNitriteSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Wesley Ruise
Phone: 7607423771
Email: wesley.ruisejr@lajolla-nsn.gov

Frequently asked questions about La Jolla Western

Is La Jolla Western tap water safe to drink?

EPA monitoring detected 4 contaminants in La Jolla Western'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 La Jolla Western's water?

EPA monitoring detected Lead, TTHM, Total Haloacetic Acids (HAA5), Dichloromethane. The full list with the level and data source for each is above.

How many people does La Jolla Western serve?

La Jolla Western reports serving 296 people in California, per its EPA record.

Has La Jolla Western had any water quality violations?

The EPA has 26 violations on file for La Jolla Western, of which 3 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.