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Tap water quality report

Chino, CA

EPA monitoring detected 29 contaminants across the 2 water suppliers serving Chino. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

2
water suppliers
97,102
people served
29
contaminants found
California rankings Lead in California PFAS in California

What was found in Chino's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
83700 µg/L 837%
of the EPA limit, in the worst sample — 10000 µg/L
 2/2 SYR4
Nitrate-Nitrite
27000 µg/L 270%
of the EPA limit, in the worst sample — 10000 µg/L
 2/2 SYR4
Fluoride
279 µg/L 7%
of the EPA limit 4000 µg/L
 2/2 SYR4
Barium
180 µg/L 9%
of the EPA limit 2000 µg/L
 2/2 SYR4
Copper
110 µg/L 8.5%
of the EPA limit 1300 µg/L
 1/2 SYR4
TTHM
96 µg/L 120%
of the EPA limit, in the worst sample — 80 µg/L
 2/2 SYR4
Dibromochloromethane
35 µg/L
No EPA limit set
 2/2 SYR4
Selenium
33.6 µg/L 67%
of the EPA limit 50 µg/L
 1/2 SYR4
Bromoform
32 µg/L
No EPA limit set
 2/2 SYR4
Total Haloacetic Acids (HAA5)
23.4 µg/L 39%
of the EPA limit 60 µg/L
 2/2 SYR4
Chloroform
23 µg/L
No EPA limit set
 1/2 SYR4
Monochloroacetic Acid
21.9 µg/L
No EPA limit set
 1/2 SYR4
Bromodichloromethane
21 µg/L
No EPA limit set
 1/2 SYR4
Chromium
15 µg/L 15%
of the EPA limit 100 µg/L
 2/2 SYR4
Tetrachloroethylene
15 µg/L 300%
of the EPA limit, in the worst sample — 5 µg/L
 1/2 SYR4
Combined Uranium
9.983 µg/L 33%
of the EPA limit 30 µg/L
 1/2 SYR4
Dichloroacetic Acid
8.3 µg/L
No EPA limit set
 2/2 SYR4
Dibromoacetic Acid
8.2 µg/L
No EPA limit set
 2/2 SYR4
Trichloroacetic Acid
6.1 µg/L
No EPA limit set
 2/2 SYR4
Arsenic
4.4 µg/L 44%
of the EPA limit 10 µg/L
 2/2 SYR4
Trichloroethylene
2.98 µg/L 60%
of the EPA limit 5 µg/L
 2/2 SYR4
Picloram
2.1 µg/L 0.4%
of the EPA limit 500 µg/L
 1/2 SYR4
Cadmium
1.71 µg/L 34%
of the EPA limit 5 µg/L
 1/2 SYR4
Mercury
1.7 µg/L 85%
of the EPA limit 2 µg/L
 1/2 SYR4
Monobromoacetic Acid
1.4 µg/L
No EPA limit set
 2/2 SYR4
Nitrite
0.9700 µg/L 0.1%
of the EPA limit 1000 µg/L
 1/2 SYR4
Asbestos
0.1980 MFL 2.8%
of the EPA limit 7 MFL
 1/2 SYR4
1,2-DIBROMO-3-CHLOROPROPANE
0.0860 µg/L 43%
of the EPA limit 0.2000 µg/L
 1/2 SYR4
Lead
0.0010 mg/L 6.7%
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. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Chino

SupplierPopulation served
CHINO, CITY OF 86,435
CALIFORNIA INSTITUTION FOR MEN 10,667

Frequently asked questions about Chino tap water

Is Chino tap water safe to drink?

EPA testing detected 29 contaminants in the water serving Chino. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Chino?

2 public water suppliers report drinking-water monitoring for Chino, California to the EPA. Each is listed above with its population served.

What contaminants are in Chino's water?

The contaminants EPA monitoring detected in Chino include Nitrate, Nitrate-Nitrite, Fluoride, Barium, Copper. The full list, with the highest level found and the data source, is in the table above.

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.