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Tap water quality report

ZIP 94028 — California

EPA monitoring across the 1 water supplier serving ZIP 94028 in California detected 25 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.

1
water supplier
61,431
people served
25
contaminants found

What was found in ZIP 94028

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
Fluoride
377.5 µg/L 9.4%
of the EPA limit 4000 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Barium
107 µg/L 5.4%
of the EPA limit 2000 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Nitrate
91.756 µg/L 0.9%
of the EPA limit 10000 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
TTHM
71.02 µg/L 89%
of the EPA limit 80 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Chloroform
58.279999999999994 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
54 µg/L 90%
of the EPA limit 60 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Bromoform
33.73199999999997 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Dichloroacetic Acid
32 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Copper
27.98395 µg/L 2.2%
of the EPA limit 1300 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Trichloroacetic Acid
23 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Bromodichloromethane
15.930999999999989 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Chromium
7.2164999999999955 µg/L 7.2%
of the EPA limit 100 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Dibromoacetic Acid
6.2 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Dibromochloromethane
4.609999999999999 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Selenium
3.8644 µg/L 7.7%
of the EPA limit 50 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Monochloroacetic Acid
3.2 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Arsenic
1.7318500000000001 µg/L 17%
of the EPA limit 10 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Monobromoacetic Acid
1.3 µg/L
No EPA limit set
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Combined Uranium
1.033315 µg/L 3.4%
of the EPA limit 30 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Lead
0.4694 µg/L 3.1%
of the EPA limit 15 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Antimony, Total
0.2215 µg/L 3.7%
of the EPA limit 6 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Cadmium
0.0280 µg/L 0.6%
of the EPA limit 5 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Mercury
0.0195 µg/L 1%
of the EPA limit 2 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Beryllium, Total
0.0118 µg/L 0.3%
of the EPA limit 4 µg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2019
1/1 SYR4
Lead
0.0040 mg/L 27%
of the EPA limit 0.0150 mg/L
Main supplier: CALIFORNIA WATER SERVICE - BEAR GULCH · 61,431 people · 2024
1/1 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 94028

SupplierStatePopulation served
CALIFORNIA WATER SERVICE - BEAR GULCH CA 61,431

Frequently asked questions about ZIP 94028 tap water

Is the tap water in ZIP 94028 safe to drink?

EPA testing detected 25 contaminants across the water suppliers serving ZIP 94028. 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 94028?

1 public water supplier report EPA drinking-water monitoring for ZIP 94028. Each is listed above with its population served.

What contaminants are in ZIP 94028's water?

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