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Tap water quality report

Metropolitan Water Dist. of So. Cal.

EPA monitoring tested this supplier for 81 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

81
contaminants tested
20
detected
0
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
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.

0
health-based violations
1
violations on file
0
still open
ViolationTypeStatusPeriod
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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Bromodichloromethane
32 µg/L
No EPA limit set
 1552/1553 SYR4 2012–2019
Dibromochloromethane
32 µg/L
No EPA limit set
 1552/1553 SYR4 2012–2019
TTHM
84 µg/L 105%
of the EPA limit, in the worst sample — 80 µg/L
 1552/1553 SYR4 2012–2019
Bromoform
26 µg/L
No EPA limit set
 1539/1553 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
35 µg/L 58%
of the EPA limit 60 µg/L
 1538/1553 SYR4 2012–2019
Chloroform
28 µg/L
No EPA limit set
 1479/1553 SYR4 2012–2019
Dichloroacetic Acid
21 µg/L
No EPA limit set
 1406/1553 SYR4 2012–2019
Dibromoacetic Acid
10 µg/L
No EPA limit set
 1364/1550 SYR4 2012–2019
Trichloroacetic Acid
16 µg/L
No EPA limit set
 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
14 pCi/L
No EPA limit set
 93/104 SYR4 2014–2017
Monochloroacetic Acid
9.2 µg/L
No EPA limit set
 81/1523 SYR4 2012–2019
Combined Uranium
9.685 µg/L 32%
of the EPA limit 30 µg/L
 75/104 SYR4 2014–2017
Nitrate
1084.8 µg/L 11%
of the EPA limit 10000 µg/L
 72/208 SYR4 2012–2019
Arsenic
6.4 µg/L 64%
of the EPA limit 10 µg/L
 60/106 SYR4 2012–2019
Barium
144 µg/L 7.2%
of the EPA limit 2000 µg/L
 38/104 SYR4 2012–2019
Nitrate-Nitrite
948000 µg/L 9480%
of the EPA limit, in the worst sample — 10000 µg/L
 38/102 SYR4 2012–2019
Monobromoacetic Acid
3.5 µg/L
No EPA limit set
 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
vgalvez@mwdh2o.com

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.