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Tap water quality report

Maywood Mutual Water Co. #1

EPA monitoring tested this supplier for 111 contaminants and detected 17. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

111
contaminants tested
17
detected
5,500
people served
4
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.

4
health-based violations
8
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 1994-02-01 → 1994-02-28
MCL Health-based Resolved 1994-02-01 → 1994-02-28
MCL Health-based Resolved 1993-03-01 → 1993-03-31
MCL Health-based Resolved 1993-03-01 → 1993-03-31
MR Monitoring Resolved 2017-04-01 → 2017-06-30
MR Monitoring Resolved 2017-04-01 → 2017-06-30
MR Monitoring Resolved 2017-04-01 → 2017-06-30
MR Monitoring Resolved 2017-04-01 → 2017-06-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOS 0.0113 µg/L 4/4 2024

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
TTHM
46.6 µg/L 58%
of the EPA limit 80 µg/L
worst single sample: 58.5 µg/L
61/64 SYR4 2012–2019
Bromoform
13.055 µg/L
No EPA limit set
worst single sample: 21.1 µg/L
58/64 SYR4 2012–2019
Dibromochloromethane
15.545 µg/L
No EPA limit set
worst single sample: 18.2 µg/L
58/64 SYR4 2012–2019
Bromodichloromethane
14.25 µg/L
No EPA limit set
worst single sample: 17.4 µg/L
51/64 SYR4 2012–2019
Chloroform
18.555 µg/L
No EPA limit set
worst single sample: 21.1 µg/L
50/64 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
21.72 µg/L 36%
of the EPA limit 60 µg/L
worst single sample: 26.8 µg/L
50/64 SYR4 2012–2019
Dibromoacetic Acid
4.36 µg/L
No EPA limit set
worst single sample: 5.9 µg/L
49/64 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 41/41 LCR 2024
Dichloroacetic Acid
12.1 µg/L
No EPA limit set
worst single sample: 16.6 µg/L
39/64 SYR4 2012–2019
Trichloroacetic Acid
6.15 µg/L
No EPA limit set
worst single sample: 6.4 µg/L
31/64 SYR4 2012–2019
Nitrate
1100 µg/L 11%
of the EPA limit 10000 µg/L
 16/34 SYR4 2012–2019
Fluoride
540 µg/L 14%
of the EPA limit 4000 µg/L
worst single sample: 600 µg/L
9/9 SYR4 2012–2018
Barium
186.5 µg/L 9.3%
of the EPA limit 2000 µg/L
worst single sample: 190 µg/L
8/9 SYR4 2012–2018
Combined Uranium
3.24075 µg/L 11%
of the EPA limit 30 µg/L
worst single sample: 3.278 µg/L
2/5 SYR4 2012–2018
Nitrate-Nitrite
994500 µg/L 9945%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
worst single sample: 1000000 µg/L
2/4 SYR4 2012–2017
Lithium
12.6 µg/L
No EPA limit set
 2/4 UCMR-5 2024
94 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 EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
PALOS, SERGIO
Phone
323-560-2439
Email
[email protected]

Frequently asked questions about Maywood Mutual Water Co. #1

Is Maywood Mutual Water Co. #1 tap water safe to drink?

EPA monitoring detected 17 contaminants in Maywood Mutual Water Co. #1'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. #1's water?

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

How many people does Maywood Mutual Water Co. #1 serve?

Maywood Mutual Water Co. #1 reports serving 5,500 people in California, per its EPA record.

Has Maywood Mutual Water Co. #1 had any water quality violations?

The EPA has 8 violations on file for Maywood Mutual Water Co. #1, of which 4 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.