Tap WaterIndex

← Monterey Park, CA

Tap water quality report

ZIP 91754 — Monterey Park, CA

EPA monitoring across the 2 water suppliers serving ZIP 91754 in Monterey Park, CA detected 42 contaminants. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier below, with the EPA limit for each.

2
water suppliers
214,657
people served
42
contaminants found

What was found in ZIP 91754

The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
6200 µg/L 62%
of the EPA limit 10000 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Nitrate-Nitrite
6160 µg/L 62%
of the EPA limit 10000 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 6175 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Fluoride
870 µg/L 22%
of the EPA limit 4000 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 908 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Barium
160 µg/L 8%
of the EPA limit 2000 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Copper
68.37104999999988 µg/L 5.3%
of the EPA limit 1300 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 145.14999999999998 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Tetrachloroethylene
4.65 µg/L 93%
of the EPA limit 5 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 78.25 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
TTHM
53.30499999999999 µg/L 67%
of the EPA limit 80 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Lithium
47.1 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
1/2 UCMR-5
Total Haloacetic Acids (HAA5)
26 µg/L 43%
of the EPA limit 60 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Dibromochloromethane
18.15 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Chloroform
17.5215 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Bromodichloromethane
17.077999999999996 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Combined Uranium
6.810491999999994 µg/L 23%
of the EPA limit 30 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 16.7625 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Arsenic
8.24 µg/L 82%
of the EPA limit 10 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 15 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Dichloroacetic Acid
13 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Chromium
11.60625 µg/L 12%
of the EPA limit 100 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Trichloroacetic Acid
7.629999999999998 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Dibromoacetic Acid
6.935 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Trichloroethylene
6.623499999999993 µg/L 132%
of the EPA limit, at the 95th percentile of samples — 5 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Lead
6.615199999999996 µg/L 44%
of the EPA limit 15 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Bromoform
6.520499999999999 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Selenium
4.155599999999999 µg/L 8.3%
of the EPA limit 50 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Monochloroacetic Acid
2.5 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
Highest in the ZIP: 3.04 µg/L — MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
2/2 SYR4
Xylenes, Total
3 µg/L 0%
of the EPA limit 10000 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
2.47 pCi/L 49%
of the EPA limit 5 pCi/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2018
1/2 SYR4
Dichloromethane
2.4400000000000004 µg/L 49%
of the EPA limit 5 µg/L
Highest in the ZIP: MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
1/2 SYR4
1,1-Dichloroethylene
2.431999999999998 µg/L 35%
of the EPA limit 7 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
2/2 SYR4
Monobromoacetic Acid
1.6 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
cis-1,2-Dichloroethylene
1.3 µg/L 1.9%
of the EPA limit 70 µg/L
Highest in the ZIP: MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
1/2 SYR4
1,2,4-Trichlorobenzene
0.6100 µg/L 0.9%
of the EPA limit 70 µg/L
Highest in the ZIP: MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
1/2 SYR4
Ethylbenzene
0.5000 µg/L 0.1%
of the EPA limit 700 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
trans-1,2-Dichloroethylene
0.2680 µg/L 0.3%
of the EPA limit 100 µg/L
Highest in the ZIP: MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
1/2 SYR4
Toluene
0.1000 µg/L 0%
of the EPA limit 1000 µg/L
Highest in the ZIP: MONTEREY PARK-CITY, WATER DEPT. · 62,183 people · 2019
1/2 SYR4
Antimony, Total
0.0790 µg/L 1.3%
of the EPA limit 6 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Cadmium
0.0141 µg/L 0.3%
of the EPA limit 5 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Pfpea
0.0129 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
2/2 UCMR-5
PFOS
0.0086 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
1/2 UCMR-5
Pfba
0.0080 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
2/2 UCMR-5
Pfhxa
0.0076 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
1/2 UCMR-5
PFBS
0.0049 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2025
1/2 UCMR-5
Beryllium, Total
0.0048 µg/L 0.1%
of the EPA limit 4 µg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: CALIFORNIA WATER SERVICE CO. - ELA · 152,474 people · 2023
2/2 LCR
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 the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Water suppliers serving ZIP 91754

SupplierStatePopulation served
CALIFORNIA WATER SERVICE CO. - ELA CA 152,474
MONTEREY PARK-CITY, WATER DEPT. CA 62,183

Frequently asked questions about ZIP 91754 tap water

Is the tap water in ZIP 91754 safe to drink?

EPA testing detected 42 contaminants across the water suppliers serving ZIP 91754. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.

Which water suppliers serve ZIP 91754?

2 public water suppliers report EPA drinking-water monitoring for ZIP 91754. Each is listed above with its population served.

What contaminants are in ZIP 91754's water?

EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper, and others across this ZIP's suppliers. The full list with levels and sources is above.