Is Rancho Cordova, CA tap water safe?

Data: U.S. EPA · How we read the data · How we check it

California American Water – Suburban Rosemont, the largest system here, had PFAS above the 2024 federal limits (PFOA, PFOS) in EPA's 2023–2025 testing.

Is it an emergency? No: PFAS limits are about years of exposure, not a glass of water, and nothing in EPA's data calls for you to stop drinking the water today. If your utility issues a boil-water or do-not-drink notice, follow it.

3 public water systems serve parts of Rancho Cordova. The largest, California American Water – Suburban Rosemont, serves 54,893 people, and one system here had PFAS above a federal limit. Your water bill names your system.

Largest system

California American Water – Suburban Rosemont

54,893 people · Purchased surface water · EPA ID CA3410010

Buys treated water from City of Sacramento Main, SCWA Mather-Sunrise.

PFAS	Highest average	Limit	Status
PFOA Above limit	4.1 ppt	4 ppt	Above limit
PFOS Above limit	11.8 ppt	4 ppt	Above limit
PFHxS Detected, below limit	9.95 ppt	10 ppt	Detected, below limit
PFNA Not detected	–	10 ppt	Not detected
HFPO-DA (GenX) Not detected	–	10 ppt	Not detected

ppt = parts per trillion. "Highest average" is the highest average at any of the system's entry points, the way EPA compares results with the limits.

For context: the PFOA average is higher than at 87% of the California systems EPA tested and the PFOS average is higher than at 90% of the California systems EPA tested.

Lead: 0 ppb at the 90th percentile (Dec 2025, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Full California American Water – Suburban Rosemont results

Across California, 129 of 691 water systems EPA tested had PFAS above a 2024 federal limit, and 26 systems were above the lead action level in results from the last five years. California results.

Rancho Cordova homes and lead pipes

51%

of homes built before 1980 (California 56%, US 50%)

built before 1950 (California 14%)

42%

of households rent (California 44%)

Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. Renting? Ask your landlord what the service line is made of, because it's their pipe to replace. How to check your own line.

Housing: Census American Community Survey 2020–2024 5-year estimates for Rancho Cordova city (tables B25034, B25003). Estimates for small places have a margin of error.

Which system serves your ZIP code

Based on the ZIP codes each system reported serving. Boundaries don't follow ZIP lines exactly, so your water bill is the final word.

System	ZIP codes in Rancho Cordova
California American Water – Suburban Rosemont 54,893 people	95670, 95827
SCWA Mather-Sunrise 32,812 people	95742

Other water systems serving Rancho Cordova

Golden State Water Company – Cordova
47,366 people · Surface water · California · reported ZIPs here
No PFAS above limits
SCWA Mather-Sunrise
32,812 people · Purchased surface water · California · reported ZIPs here
No PFAS above limitsAlso: 1 health-based violation since 2016

How nearby cities compare

City	Main water system	PFAS
Folsom 8 mi City of Folsom – Main	City of Folsom – Main	None above limits
Citrus Heights 9 mi Sacramento Suburban Water District	Sacramento Suburban Water District	None above limits
Sacramento 13 mi City of Sacramento Main	City of Sacramento Main	Above limit
Elk Grove 14 mi SCWA – Laguna/Vineyard	SCWA – Laguna/Vineyard	Above limit
Roseville 14 mi City of Roseville	City of Roseville	None above limits
Rocklin 16 mi Placer CWA – Foothill	Placer CWA – Foothill	None above limits

Questions

Is Rancho Cordova tap water safe to drink?

California American Water – Suburban Rosemont has had no health-based violations since 2016, and EPA testing found PFAS above the 2024 federal limits, which it must meet by 2029. Utility data can't show lead from your own pipes: if your home was built before 1986, test your tap. Your utility's annual Consumer Confidence Report is the official summary.

Who supplies water in Rancho Cordova, CA?

3 public water systems serve parts of Rancho Cordova. The largest is California American Water – Suburban Rosemont (54,893 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Rancho Cordova tap water have PFAS?

Yes. EPA's 2023–2025 testing found entry-point averages above the 2024 federal limits for PFOA and PFOS at California American Water – Suburban Rosemont. Systems have until 2029 to meet them.

Do Rancho Cordova homes have lead pipes?

Census estimates put 51% of Rancho Cordova homes as built before 1980 (California: 56%). Lead service lines and lead solder were allowed until 1986, so older homes are more likely to have them. California American Water – Suburban Rosemont's service line inventory says what your line is made of. The only way to know for your home is to check the line where it enters the house and test your tap.

Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.