Is Cypress, CA tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
Golden State Water Company – West Orange County, 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.
2 public water systems serve parts of Cypress. The largest, Golden State Water Company – West Orange County, serves 114,693 people, and 2 systems here had PFAS above a federal limit. Your water bill names your system.
Largest system
Golden State Water Company – West Orange County
114,693 people · Purchased surface water · EPA ID CA3010022
Buys treated water from Golden State Water Company – Artesia, Metropolitan Water District of SO. Cal., City of Garden Grove, City of Buena Park, City of Seal Beach.
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Above limit | 7.5 ppt | 4 ppt |
| PFOS Above limit | 15.2 ppt | 4 ppt |
| PFHxS Detected, below limit | 9.25 ppt | 10 ppt |
| PFNA Not detected | – | 10 ppt |
| HFPO-DA (GenX) Not detected | – | 10 ppt |
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 93% of the California systems EPA tested and the PFOS average is higher than at 93% of the California systems EPA tested.
Lead: 2.2 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 Golden State Water Company – West Orange County 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.
Cypress homes and lead pipes
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 Cypress city (tables B25034, B25003). Estimates for small places have a margin of error.
Other water systems serving Cypress
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Stanton 3 mi Golden State Water Company – West Orange County | Above limit | 2.2 ppb |
| Buena Park 3 mi City of Buena Park | Above limit | 0 ppb |
| Cerritos 4 mi Golden State Water Company – Artesia | Above limit | 0 ppb |
| Lakewood 5 mi City of Lakewood Water Dept. | Above limit | 0 ppb |
| Westminster 5 mi City of Westminster | Above limit | 4.7 ppb |
| Garden Grove 5 mi City of Garden Grove | Above limit | 0 ppb |
Cypress ZIP codes (1)
- 90630
Questions
Is Cypress tap water safe to drink?
Golden State Water Company – West Orange County 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 Cypress, CA?
2 public water systems serve parts of Cypress. The largest is Golden State Water Company – West Orange County (114,693 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does Cypress tap water have PFAS?
Yes. EPA's 2023–2025 testing found entry-point averages above the 2024 federal limits for PFOA and PFOS at Golden State Water Company – West Orange County. Systems have until 2029 to meet them.
Do Cypress homes have lead pipes?
Census estimates put 76% of Cypress 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. Golden State Water Company – West Orange County'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.