Tap WaterIndex

← Rosemead, CA

Tap water quality report

ZIP 91108 — Rosemead, CA

EPA monitoring across the 2 water suppliers serving ZIP 91108 in Rosemead, CA detected 27 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
73,247
people served
27
contaminants found

What was found in ZIP 91108

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
16600 µg/L 166%
of the EPA limit, in the worst sample — 10000 µg/L
 2/2 SYR4
Nitrate-Nitrite
16000 µg/L 160%
of the EPA limit, in the worst sample — 10000 µg/L
 1/2 SYR4
Fluoride
1080 µg/L 27%
of the EPA limit 4000 µg/L
 2/2 SYR4
Copper
160 µg/L 12%
of the EPA limit 1300 µg/L
 1/2 SYR4
Lithium
91.9 µg/L
No EPA limit set
 1/2 UCMR-5
Chromium
44 µg/L 44%
of the EPA limit 100 µg/L
 2/2 SYR4
TTHM
43 µg/L 54%
of the EPA limit 80 µg/L
 2/2 SYR4
Total Haloacetic Acids (HAA5)
29 µg/L 48%
of the EPA limit 60 µg/L
 2/2 SYR4
Combined Uranium
26.82 µg/L 89%
of the EPA limit 30 µg/L
 2/2 SYR4
Dibromochloromethane
17.2 µg/L
No EPA limit set
 2/2 SYR4
Bromodichloromethane
17.1 µg/L
No EPA limit set
 2/2 SYR4
Tetrachloroethylene
17 µg/L 340%
of the EPA limit, in the worst sample — 5 µg/L
 2/2 SYR4
Chloroform
15.9 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
13 µg/L
No EPA limit set
 2/2 SYR4
Dichloroacetic Acid
12 µg/L
No EPA limit set
 2/2 SYR4
Bromoform
8.2 µg/L
No EPA limit set
 2/2 SYR4
Trichloroethylene
6.1 µg/L 122%
of the EPA limit, in the worst sample — 5 µg/L
 2/2 SYR4
Dibromoacetic Acid
4.8 µg/L
No EPA limit set
 2/2 SYR4
Carbon Tetrachloride
3.5 µg/L 70%
of the EPA limit 5 µg/L
 2/2 SYR4
Arsenic
3.2 µg/L 32%
of the EPA limit 10 µg/L
 2/2 SYR4
Monochloroacetic Acid
3 µg/L
No EPA limit set
 1/2 SYR4
1,2-Dichloropropane
2.9 µg/L 58%
of the EPA limit 5 µg/L
 1/2 SYR4
Mercury
2.1 µg/L 105%
of the EPA limit, in the worst sample — 2 µg/L
 1/2 SYR4
cis-1,2-Dichloroethylene
1.1 µg/L 1.6%
of the EPA limit 70 µg/L
 1/2 SYR4
Lead
1 µg/L 6.7%
of the EPA limit 15 µg/L
 1/2 SYR4
Pfba
0.0053 µg/L
No EPA limit set
 1/2 UCMR-5
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 91108

SupplierStatePopulation served
CAL/AM WATER COMPANY - SAN MARINO CA 47,995
SUNNY SLOPE WATER CO. CA 25,252

Frequently asked questions about ZIP 91108 tap water

Is the tap water in ZIP 91108 safe to drink?

EPA testing detected 27 contaminants across the water suppliers serving ZIP 91108. 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 91108?

2 public water suppliers report EPA drinking-water monitoring for ZIP 91108. Each is listed above with its population served.

What contaminants are in ZIP 91108's water?

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