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Tap water quality report

Monterey Park-City, Water Dept.

EPA monitoring tested this supplier for 112 contaminants and detected 26. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

112
contaminants tested
26
detected
62,183
people served
1
health-based violations
California rankingsLead in CaliforniaPFAS in California
Water source
Ground 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.

1
health-based violations
4
violations on file
2
still open
ViolationTypeStatusPeriod
TT Health-based Unaddressed 2024-10-17
RPT Monitoring Unaddressed 2024-10-17
MR Monitoring Resolved 2005-04-01 → 2005-04-30
MR Monitoring Resolved 2005-04-01 → 2005-04-30

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
Pfba 0.0074 µg/L 2/2 2025
Pfpea 0.0050 µg/L 1/2 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 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
Nitrate
7300 µg/L 73%
of the EPA limit 10000 µg/L
 7028/7334 SYR4 2012–2019
Tetrachloroethylene
190 µg/L 3800%
of the EPA limit, in the worst sample — 5 µg/L
 2456/15087 SYR4 2012–2019
cis-1,2-Dichloroethylene
2.5 µg/L 3.6%
of the EPA limit 70 µg/L
 1678/15060 SYR4 2012–2019
Trichloroethylene
3.7 µg/L 74%
of the EPA limit 5 µg/L
 1452/15087 SYR4 2012–2019
Arsenic
18 µg/L 180%
of the EPA limit, in the worst sample — 10 µg/L
 950/2298 SYR4 2012–2019
TTHM
18 µg/L 23%
of the EPA limit 80 µg/L
 118/13564 SYR4 2012–2019
Bromoform
12 µg/L
No EPA limit set
 105/13765 SYR4 2012–2019
Dibromochloromethane
4.4 µg/L
No EPA limit set
 88/13766 SYR4 2012–2019
Dichloromethane
4.4 µg/L 88%
of the EPA limit 5 µg/L
 77/14908 SYR4 2012–2019
Fluoride
970 µg/L 24%
of the EPA limit 4000 µg/L
 45/45 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
3.1 µg/L 5.2%
of the EPA limit 60 µg/L
 42/124 SYR4 2012–2019
Dibromoacetic Acid
2.4 µg/L
No EPA limit set
 39/124 SYR4 2012–2019
1,1-Dichloroethylene
0.5500 µg/L 7.9%
of the EPA limit 7 µg/L
 31/15000 SYR4 2012–2019
Chloroform
0.2400 µg/L
No EPA limit set
 29/13766 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 29/29 LCR 2024
Combined Uranium
19.37 µg/L 65%
of the EPA limit 30 µg/L
 11/13 SYR4 2012–2019
Toluene
0.1000 µg/L 0%
of the EPA limit 1000 µg/L
 7/14933 SYR4 2012–2019
Nitrate-Nitrite
6500 µg/L 65%
of the EPA limit 10000 µg/L
 6/8 SYR4 2018–2019
Monochloroacetic Acid
3.1 µg/L
No EPA limit set
 4/124 SYR4 2012–2019
Bromodichloromethane
1.5 µg/L
No EPA limit set
 3/13766 SYR4 2012–2019
Copper
150 µg/L 12%
of the EPA limit 1300 µg/L
 2/24 SYR4 2012–2019
trans-1,2-Dichloroethylene
0.2700 µg/L 0.3%
of the EPA limit 100 µg/L
 2/14933 SYR4 2012–2019
1,2,4-Trichlorobenzene
0.6100 µg/L 0.9%
of the EPA limit 70 µg/L
 1/14935 SYR4 2012–2019
Xylenes, Total
1.2 µg/L 0%
of the EPA limit 10000 µg/L
 1/14726 SYR4 2012–2019
86 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,3,7,8-TCDD2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylene DibromideEndothallEndrinEthylbenzeneGlyphosateGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneThallium, TotalTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidVinyl ChlorideLithiumO-DichlorobenzeneP-Dichlorobenzene

Utility contact

Contact
VELAZQUEZ, ERIC
Phone
626-280-5552
Email
evelazquez@montereypark.ca.gov

Frequently asked questions about Monterey Park-City, Water Dept.

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

EPA monitoring detected 26 contaminants in Monterey Park-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 Monterey Park-City, Water Dept.'s water?

EPA monitoring detected Nitrate, Tetrachloroethylene, cis-1,2-Dichloroethylene, Trichloroethylene, Arsenic, and others. The full list with the level and data source for each is above.

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

Monterey Park-City, Water Dept. reports serving 62,183 people in California, per its EPA record.

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

The EPA has 4 violations on file for Monterey Park-City, Water Dept., of which 1 is 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.