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Tap water quality report

Rancho Cordova, CA

EPA monitoring detected 17 contaminants across the 3 water suppliers serving Rancho Cordova. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

3
water suppliers
53,219
people served
17
contaminants found
California rankings Lead in California PFAS in California

What was found in Rancho Cordova's water

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

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
757000 µg/L 7570%
of the EPA limit, at the 95th percentile of samples — 10000 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2019
2/3 SYR4
Nitrate
4294 µg/L 43%
of the EPA limit 10000 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2019
Highest in the city: 4680.3 µg/L — HOMETOWN COLONIAL ESTATES LLC · 400 people · 2019
3/3 SYR4
Fluoride
195.5 µg/L 4.9%
of the EPA limit 4000 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2019
Highest in the city: 208.5 µg/L — HOMETOWN COLONIAL ESTATES LLC · 400 people · 2019
3/3 SYR4
Barium
157 µg/L 7.9%
of the EPA limit 2000 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2018
3/3 SYR4
Chromium
150 µg/L 150%
of the EPA limit, at the 95th percentile of samples — 100 µg/L
Highest in the city: HOMETOWN COLONIAL ESTATES LLC · 400 people · 2018
1/3 SYR4
Copper
129.5 µg/L 10%
of the EPA limit 1300 µg/L
Highest in the city: HOMETOWN COLONIAL ESTATES LLC · 400 people · 2018
1/3 SYR4
Lead
9.3 µg/L 62%
of the EPA limit 15 µg/L
Highest in the city: HOMETOWN COLONIAL ESTATES LLC · 400 people · 2018
1/3 SYR4
Di(2-ethylhexyl) Phthalate
8.9 µg/L 148%
of the EPA limit, at the 95th percentile of samples — 6 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2018
1/3 SYR4
Chloroform
6.7 µg/L
No EPA limit set
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2013
1/3 SYR4
TTHM
6.7 µg/L 8.4%
of the EPA limit 80 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2013
1/3 SYR4
Arsenic
4.15 µg/L 42%
of the EPA limit 10 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2018
2/3 SYR4
Gross Beta Particle Activity
3.6 pCi/L
No EPA limit set
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2012
1/3 SYR4
Beryllium, Total
3.2 µg/L 80%
of the EPA limit 4 µg/L
Highest in the city: HOMETOWN COLONIAL ESTATES LLC · 400 people · 2018
1/3 SYR4
Tetrachloroethylene
0.9090 µg/L 18%
of the EPA limit 5 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2019
Highest in the city: 1.845 µg/L — GOLDEN STATE WATER CO - ARDEN WATER SERV · 5,658 people · 2019
2/3 SYR4
Combined Uranium
1.7284 µg/L 5.8%
of the EPA limit 30 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2012
1/3 SYR4
Trichloroethylene
1.5 µg/L 30%
of the EPA limit 5 µg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2019
1/3 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: GOLDEN STATE WATER CO. - CORDOVA · 47,161 people · 2024
3/3 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. 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 Rancho Cordova

SupplierPopulation served
GOLDEN STATE WATER CO. - CORDOVA 47,161
GOLDEN STATE WATER CO - ARDEN WATER SERV 5,658
HOMETOWN COLONIAL ESTATES LLC 400

Frequently asked questions about Rancho Cordova tap water

Is Rancho Cordova tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Rancho Cordova. 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 Rancho Cordova?

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

What contaminants are in Rancho Cordova's water?

The contaminants EPA monitoring detected in Rancho Cordova include Nitrate-Nitrite, Nitrate, Fluoride, Barium, Chromium. The full list, with the level at the main supplier 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.