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Tap water quality report

Maywood Mutual Water Co. #3

EPA monitoring tested this supplier for 110 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

110
contaminants tested
20
detected
6,059
people served
6
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
Ownership
Private
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.

6
health-based violations
10
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2003-07-01 → 2003-07-31
MCL Health-based Resolved 2003-07-01 → 2003-07-31
MCL Health-based Resolved 2001-08-01 → 2001-08-31
MCL Health-based Resolved 2001-08-01 → 2001-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MCL Health-based Resolved 1993-08-01 → 1993-08-31
MR Monitoring Resolved 2019-10-01
MR Monitoring Resolved 2019-10-01
MR Monitoring Resolved 1993-08-01 → 1993-08-31
MR Monitoring Resolved 1993-08-01 → 1993-08-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOS 0.0264 µg/L 4/6 2025
PFHXS 0.0061 µg/L 3/6 2025
PFOA 0.0073 µg/L 3/6 2025

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Trichloroethylene
4.855 µg/L 97%
of the EPA limit 5 µg/L
worst single sample: 5.5 µg/L
64/94 SYR4 2012–2019
TTHM
87.98 µg/L 110%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
worst single sample: 109.9 µg/L
63/116 SYR4 2012–2019
Dibromochloromethane
35.595 µg/L
No EPA limit set
worst single sample: 42.7 µg/L
62/116 SYR4 2012–2019
Bromodichloromethane
14.865 µg/L
No EPA limit set
worst single sample: 19 µg/L
60/117 SYR4 2012–2019
Bromoform
31.03 µg/L
No EPA limit set
worst single sample: 40.8 µg/L
60/116 SYR4 2012–2019
Nitrate
3616 µg/L 36%
of the EPA limit 10000 µg/L
worst single sample: 3842 µg/L
54/68 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
15.62 µg/L 26%
of the EPA limit 60 µg/L
worst single sample: 19.8 µg/L
53/64 SYR4 2012–2019
Dibromoacetic Acid
10.6 µg/L
No EPA limit set
worst single sample: 15.9 µg/L
51/64 SYR4 2012–2019
Chloroform
7.64 µg/L
No EPA limit set
worst single sample: 9.3 µg/L
47/118 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 39/39 LCR 2025
Dichloroacetic Acid
2.955 µg/L
No EPA limit set
worst single sample: 3.3 µg/L
24/64 SYR4 2012–2019
Trichloroacetic Acid
2.405 µg/L
No EPA limit set
worst single sample: 3 µg/L
18/64 SYR4 2012–2019
Lead
41.55 µg/L 277%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 60 µg/L
10/198 SYR4 2014–2019
Fluoride
344 µg/L 8.6%
of the EPA limit 4000 µg/L
worst single sample: 350 µg/L
5/6 SYR4 2014–2019
Combined Uranium
2.88315 µg/L 9.6%
of the EPA limit 30 µg/L
worst single sample: 3.129 µg/L
4/8 SYR4 2014–2019
Lithium
21.8 µg/L
No EPA limit set
 3/6 UCMR-5 2025
Barium
119 µg/L 5.9%
of the EPA limit 2000 µg/L
worst single sample: 120 µg/L
2/6 SYR4 2014–2019
90 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
HEADLEY, VERONICA
Phone
323-560-3657
Email
[email protected]

Frequently asked questions about Maywood Mutual Water Co. #3

Is Maywood Mutual Water Co. #3 tap water safe to drink?

EPA monitoring detected 20 contaminants in Maywood Mutual Water Co. #3'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 Maywood Mutual Water Co. #3's water?

EPA monitoring detected Trichloroethylene, TTHM, Dibromochloromethane, Bromodichloromethane, Bromoform, and others. The full list with the level and data source for each is above.

How many people does Maywood Mutual Water Co. #3 serve?

Maywood Mutual Water Co. #3 reports serving 6,059 people in California, per its EPA record.

Has Maywood Mutual Water Co. #3 had any water quality violations?

The EPA has 10 violations on file for Maywood Mutual Water Co. #3, of which 6 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.