Is Yuima Municipal Water District Tap Water Safe? Quality Report

Water source: SWP
Ownership: Local government
Counties served: San Diego

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	2018-07-01 → 2018-07-31
MCL	Health-based	Resolved	2018-07-01 → 2018-07-31
MON	Monitoring	Resolved	2022-06-01 → 2022-06-30
MON	Monitoring	Resolved	2022-06-01 → 2022-06-30
MR	Monitoring	Resolved	2003-01-02
MR	Monitoring	Resolved	2003-01-02
MR	Monitoring	Resolved	1998-08-01 → 1998-08-31
MR	Monitoring	Resolved	1998-08-01 → 1998-08-31
MR	Monitoring	Resolved	1993-07-01 → 2000-03-01
Other	Monitoring	Archived	1984-08-01 → 1984-08-31

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	15594 µg/L 156% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 27000 µg/L	630/630	SYR4	2012–2019
Fluoride	294 µg/L 7.4% of the EPA limit 4000 µg/L worst single sample: 310 µg/L	9/9	SYR4	2013–2017
Bromodichloromethane	5.865 µg/L No EPA limit set worst single sample: 5.9 µg/L	8/8	SYR4	2012–2019
Chloroform	7.415 µg/L No EPA limit set worst single sample: 7.8 µg/L	8/8	SYR4	2012–2019
Dibromoacetic Acid	2.765 µg/L No EPA limit set worst single sample: 2.8 µg/L	8/8	SYR4	2012–2019
Dibromochloromethane	6.4 µg/L No EPA limit set worst single sample: 7.1 µg/L	8/8	SYR4	2012–2019
Dichloroacetic Acid	7.36 µg/L No EPA limit set worst single sample: 7.5 µg/L	8/8	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	8/8	LCR	2023
TTHM	20.6 µg/L 26% of the EPA limit 80 µg/L worst single sample: 22 µg/L	8/8	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	19.85 µg/L 33% of the EPA limit 60 µg/L worst single sample: 23 µg/L	8/8	SYR4	2012–2019
Selenium	10.67 µg/L 21% of the EPA limit 50 µg/L worst single sample: 11 µg/L	7/9	SYR4	2013–2017
Trichloroacetic Acid	7.06 µg/L No EPA limit set worst single sample: 7.9 µg/L	7/8	SYR4	2012–2019
Bromoform	3.05 µg/L No EPA limit set worst single sample: 3.1 µg/L	6/8	SYR4	2012–2019
Nitrate-Nitrite	13875 µg/L 139% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 15000 µg/L	4/4	SYR4	2013–2017
Barium	119 µg/L 5.9% of the EPA limit 2000 µg/L worst single sample: 120 µg/L	3/9	SYR4	2013–2017
Combined Uranium	8.6271 µg/L 29% of the EPA limit 30 µg/L worst single sample: 8.642 µg/L	3/3	SYR4	2014–2015
Monochloroacetic Acid	5.27 µg/L No EPA limit set worst single sample: 5.6 µg/L	3/8	SYR4	2012–2019
Gross Beta Particle Activity	4.2325 pCi/L No EPA limit set worst single sample: 4.3 pCi/L	2/2	SYR4	2013–2014
Monobromoacetic Acid	1.285 µg/L No EPA limit set worst single sample: 1.3 µg/L	2/8	SYR4	2012–2019
Arsenic	1.2 µg/L 12% of the EPA limit 10 µg/L	1/9	SYR4	2013–2017
Copper	2.6 µg/L 0.2% of the EPA limit 1300 µg/L	1/9	SYR4	2013–2017
Chromium	2.5 µg/L 2.5% of the EPA limit 100 µg/L	1/9	SYR4	2013–2017
Toluene	8.5 µg/L 0.9% of the EPA limit 1000 µg/L	1/7	SYR4	2013–2017

59 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,3,7,8-TCDD2,4,5-TP2,4-DAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: REEH, AMY
Phone: 760-742-3704
Email: amy@yuimamwd.com

Frequently asked questions about Yuima Municipal Water District

Is Yuima Municipal Water District tap water safe to drink?

EPA monitoring detected 23 contaminants in Yuima Municipal Water District'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 Yuima Municipal Water District's water?

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

How many people does Yuima Municipal Water District serve?

Yuima Municipal Water District reports serving 360 people in California, per its EPA record.

Has Yuima Municipal Water District had any water quality violations?

The EPA has 14 violations on file for Yuima Municipal Water District, 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.