Is Metropolitan Water Dist. of So. Cal. Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Los Angeles

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
MR	Monitoring	Resolved	1993-07-01 → 2003-12-31

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
Bromodichloromethane	16 µg/L No EPA limit set worst single sample: 32 µg/L	1552/1553	SYR4	2012–2019
Dibromochloromethane	18 µg/L No EPA limit set worst single sample: 32 µg/L	1552/1553	SYR4	2012–2019
TTHM	53 µg/L 66% of the EPA limit 80 µg/L worst single sample: 84 µg/L	1552/1553	SYR4	2012–2019
Bromoform	11 µg/L No EPA limit set worst single sample: 26 µg/L	1539/1553	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	19 µg/L 32% of the EPA limit 60 µg/L worst single sample: 35 µg/L	1538/1553	SYR4	2012–2019
Chloroform	16 µg/L No EPA limit set worst single sample: 28 µg/L	1479/1553	SYR4	2012–2019
Dichloroacetic Acid	9.975 µg/L No EPA limit set worst single sample: 21 µg/L	1406/1553	SYR4	2012–2019
Dibromoacetic Acid	5.2 µg/L No EPA limit set worst single sample: 10 µg/L	1364/1550	SYR4	2012–2019
Trichloroacetic Acid	6.3 µg/L No EPA limit set worst single sample: 16 µg/L	920/1542	SYR4	2012–2019
Fluoride	900 µg/L 23% of the EPA limit 4000 µg/L	198/208	SYR4	2012–2019
Gross Beta Particle Activity	6.06 pCi/L No EPA limit set worst single sample: 14 pCi/L	93/104	SYR4	2014–2017
Monochloroacetic Acid	5.6 µg/L No EPA limit set worst single sample: 9.2 µg/L	81/1523	SYR4	2012–2019
Combined Uranium	5.7067 µg/L 19% of the EPA limit 30 µg/L worst single sample: 9.685 µg/L	75/104	SYR4	2014–2017
Nitrate	1023.92 µg/L 10% of the EPA limit 10000 µg/L worst single sample: 1084.8 µg/L	72/208	SYR4	2012–2019
Arsenic	4.8 µg/L 48% of the EPA limit 10 µg/L worst single sample: 6.4 µg/L	60/106	SYR4	2012–2019
Barium	140.15 µg/L 7% of the EPA limit 2000 µg/L worst single sample: 144 µg/L	38/104	SYR4	2012–2019
Nitrate-Nitrite	905900 µg/L 9059% of the EPA limit, at the 95th percentile of samples — 10000 µg/L worst single sample: 948000 µg/L	38/102	SYR4	2012–2019
Monobromoacetic Acid	2.3 µg/L No EPA limit set worst single sample: 3.5 µg/L	27/1523	SYR4	2012–2019
Bromate	5.4 µg/L 54% of the EPA limit 10 µg/L	1/5	SYR4	2017
Toluene	0.6000 µg/L 0.1% of the EPA limit 1000 µg/L	1/107	SYR4	2012–2019

61 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, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: GALVEZ, VICTOR
Phone: 909-392-2460
Email: [email protected]

Frequently asked questions about Metropolitan Water Dist. of So. Cal.

Is Metropolitan Water Dist. of So. Cal. tap water safe to drink?

EPA monitoring detected 20 contaminants in Metropolitan Water Dist. of So. Cal.'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 Metropolitan Water Dist. of So. Cal.'s water?

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

How many people does Metropolitan Water Dist. of So. Cal. serve?

Metropolitan Water Dist. of So. Cal. reports serving 0 people in California, per its EPA record.

Has Metropolitan Water Dist. of So. Cal. had any water quality violations?

The EPA has 1 violation on file for Metropolitan Water Dist. of So. Cal., 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.