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Tap water quality report

ZIP 91945 — San Diego, CA

EPA monitoring across the 2 water suppliers serving ZIP 91945 in San Diego, CA detected 26 contaminants. A detection doesn't automatically mean the water is unsafe — see the highest level found below, with the EPA limit for each.

2
water suppliers
1,623,387
people served
26
contaminants found

What was found in ZIP 91945

The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
3435.2 µg/L 34%
of the EPA limit 10000 µg/L
 1/2 SYR4
Fluoride
1020 µg/L 26%
of the EPA limit 4000 µg/L
 1/2 SYR4
Chlorite
1000 µg/L 100%
of the EPA limit 1000 µg/L
 1/2 SYR4
Barium
146 µg/L 7.3%
of the EPA limit 2000 µg/L
 1/2 SYR4
TTHM
126 µg/L 158%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Combined Uranium
73.01 µg/L 243%
of the EPA limit, in the worst sample — 30 µg/L
 1/2 SYR4
Lithium
65 µg/L
No EPA limit set
 2/2 UCMR-5
Chloroform
53 µg/L
No EPA limit set
 2/2 SYR4
Dibromochloromethane
39.9 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
39.4 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
38.5 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
37.7 µg/L 63%
of the EPA limit 60 µg/L
 2/2 SYR4
Gross Beta Particle Activity
30.7 pCi/L
No EPA limit set
 1/2 SYR4
Dichloroacetic Acid
23.6 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
14.8 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
11.6 µg/L
No EPA limit set
 2/2 SYR4
Bromate
10.2 µg/L 102%
of the EPA limit, in the worst sample — 10 µg/L
 1/2 SYR4
Arsenic
7.34 µg/L 73%
of the EPA limit 10 µg/L
 1/2 SYR4
Selenium
6.82 µg/L 14%
of the EPA limit 50 µg/L
 1/2 SYR4
Monobromoacetic Acid
6.41 µg/L
No EPA limit set
 2/2 SYR4
Monochloroacetic Acid
5.4 µg/L
No EPA limit set
 2/2 SYR4
Trichloroethylene
5.05 µg/L 101%
of the EPA limit, in the worst sample — 5 µg/L
 1/2 SYR4
Tetrachloroethylene
4.47 µg/L 89%
of the EPA limit 5 µg/L
 1/2 SYR4
Mercury
1.9 µg/L 95%
of the EPA limit 2 µg/L
 1/2 SYR4
cis-1,2-Dichloroethylene
1.01 µg/L 1.4%
of the EPA limit 70 µg/L
 1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Water suppliers serving ZIP 91945

SupplierStatePopulation served
SAN DIEGO, CITY OF CA 1,385,379
OTAY WATER DISTRICT CA 238,008

Frequently asked questions about ZIP 91945 tap water

Is the tap water in ZIP 91945 safe to drink?

EPA testing detected 26 contaminants across the water suppliers serving ZIP 91945. 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 91945?

2 public water suppliers report EPA drinking-water monitoring for ZIP 91945. Each is listed above with its population served.

What contaminants are in ZIP 91945's water?

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