Is Rancho Palos Verdes, CA tap water safe?
Data: U.S. EPA · How we read the data · How we check it
Summary
No federal limits exceeded in EPA data for California Water Service – Palos Verdes.
California Water Service – Palos Verdes supplies Rancho Palos Verdes (70,830 people).
Water system
California Water Service – Palos Verdes
70,830 people · Purchased surface water · EPA ID CA1910104
Buys treated water from Metropolitan Water District of SO. Cal..
| PFAS | Highest average | Limit |
|---|---|---|
| PFOA Not detected | – | 4 ppt |
| PFOS Not detected | – | 4 ppt |
| PFHxS Not detected | – | 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.
Lead: 0 ppb at the 90th percentile (Nov 2026, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0
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 Palos Verdes homes and lead pipes
Lead service lines and lead solder were allowed until 1986, so homes from before then are the ones to check. How to check your own line.
Housing: Census American Community Survey 2020–2024 5-year estimates for Rancho Palos Verdes city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Torrance 6 mi California Water Service – Dominguez | None above limits | 1.8 ppb |
| Redondo Beach 8 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Carson 10 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Lawndale 10 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Gardena 11 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Manhattan Beach 12 mi California Water Service – Hermosa/Redondo | None above limits | 1.4 ppb |
Rancho Palos Verdes ZIP codes (1)
- 90275
Questions
Is Rancho Palos Verdes tap water safe to drink?
California Water Service – Palos Verdes has had no health-based violations since 2016. 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 Palos Verdes, CA?
California Water Service – Palos Verdes, which serves 70,830 people.
Does Rancho Palos Verdes tap water have PFAS?
None detected above EPA's reporting limits. California Water Service – Palos Verdes had no PFAS detected in EPA's 2023–2025 testing. "Not detected" means below the reporting limit (about 2 to 20 ppt), not proven zero.
Do Rancho Palos Verdes homes have lead pipes?
Census estimates put 84% of Rancho Palos Verdes 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 Water Service – Palos Verdes'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.