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Tap water quality report

Cerritos - City, Water Dept.

EPA monitoring tested this supplier for 104 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
21
detected
47,475
people served
0
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
SWP
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
2
violations on file
2
still open
ViolationTypeStatusPeriod
MR Monitoring Addressed 2025-12-17
MR Monitoring Unaddressed 2025-10-01

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFOS 0.0048 µg/L 1/10 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
TTHM
19.015 µg/L 24%
of the EPA limit 80 µg/L
worst single sample: 42.1 µg/L
160/176 SYR4 2012–2019
Bromoform
7.93 µg/L
No EPA limit set
worst single sample: 20.8 µg/L
159/176 SYR4 2012–2019
Dibromochloromethane
8.5 µg/L
No EPA limit set
worst single sample: 16.9 µg/L
159/176 SYR4 2012–2019
Bromodichloromethane
3.244 µg/L
No EPA limit set
worst single sample: 6.68 µg/L
105/175 SYR4 2012–2019
Dibromoacetic Acid
2.652 µg/L
No EPA limit set
worst single sample: 6.54 µg/L
77/190 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6.546 µg/L 11%
of the EPA limit 60 µg/L
worst single sample: 7.7 µg/L
59/184 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 48/48 LCR 2022
Trichloroethylene
2.7 µg/L 54%
of the EPA limit 5 µg/L
worst single sample: 3 µg/L
28/44 SYR4 2012–2019
1,1-Dichloroethylene
1.695 µg/L 24%
of the EPA limit 7 µg/L
worst single sample: 1.7 µg/L
22/44 SYR4 2012–2019
Nitrate
510 µg/L 5.1%
of the EPA limit 10000 µg/L
 14/48 SYR4 2012–2019
Arsenic
7.56 µg/L 76%
of the EPA limit 10 µg/L
worst single sample: 7.6 µg/L
9/9 SYR4 2012–2018
Fluoride
386 µg/L 9.7%
of the EPA limit 4000 µg/L
worst single sample: 410 µg/L
9/9 SYR4 2012–2018
Barium
180 µg/L 9%
of the EPA limit 2000 µg/L
 7/9 SYR4 2012–2018
Monochloroacetic Acid
5.375 µg/L
No EPA limit set
worst single sample: 5.5 µg/L
6/169 SYR4 2012–2019
Lithium
61 µg/L
No EPA limit set
 4/10 UCMR-5 2025
Chloroform
4.122 µg/L
No EPA limit set
worst single sample: 4.26 µg/L
2/154 SYR4 2012–2019
Combined Uranium
2.2201 µg/L 7.4%
of the EPA limit 30 µg/L
worst single sample: 2.235 µg/L
2/3 SYR4 2017
Tetrachloroethylene
0.5575 µg/L 11%
of the EPA limit 5 µg/L
worst single sample: 0.5600 µg/L
2/44 SYR4 2012–2019
Dichloroacetic Acid
1.4 µg/L
No EPA limit set
 1/168 SYR4 2012–2019
Trichloroacetic Acid
1.6 µg/L
No EPA limit set
 1/168 SYR4 2012–2019
83 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEndothallEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
TAYLOR, SOFIA
Phone
562-916-1220
Email
[email protected]

Frequently asked questions about Cerritos - City, Water Dept.

Is Cerritos - City, Water Dept. tap water safe to drink?

EPA monitoring detected 21 contaminants in Cerritos - City, Water Dept.'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 Cerritos - City, Water Dept.'s water?

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

How many people does Cerritos - City, Water Dept. serve?

Cerritos - City, Water Dept. reports serving 47,475 people in California, per its EPA record.

Has Cerritos - City, Water Dept. had any water quality violations?

The EPA has 2 violations on file for Cerritos - City, Water Dept., of which 0 are health-based (a contaminant limit or required treatment was breached) and 2 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.