Is Torrance, 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 – Dominguez. 1 PFAS were detected below the limits.
4 public water systems serve parts of Torrance. The largest, California Water Service – Dominguez, serves 149,490 people. Your water bill names your system.
Largest system
California Water Service – Dominguez
149,490 people · Purchased surface water · EPA ID CA1910033
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 Detected, below limit | 3.3 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.
Lead: 1.8 ppb at the 90th percentile (Dec 2023, 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.
Torrance 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 Torrance city (tables B25034, B25003). Estimates for small places have a margin of error.
Other water systems serving Torrance
- City of Torrance Water Dept.106,183 people · Purchased surface water · California · lists this cityLithium above screening level
- California Water Service – Hermosa/Redondo100,072 people · Purchased surface water · California · reported ZIPs hereLithium above screening level
- California Water Service – Palos Verdes70,830 people · Purchased surface water · California · reported ZIPs hereLithium above screening level
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Redondo Beach 2 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Lawndale 4 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Gardena 5 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Hawthorne 6 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
| Manhattan Beach 6 mi California Water Service – Hermosa/Redondo | None above limits | 1.4 ppb |
| Carson 6 mi Golden State Water Company – Southwest | None above limits | 1.7 ppb |
Torrance ZIP codes (4)
- 90501
- 90503
- 90504
- 90505
Questions
Is Torrance tap water safe to drink?
California Water Service – Dominguez 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 Torrance, CA?
4 public water systems serve parts of Torrance. The largest is California Water Service – Dominguez (149,490 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does Torrance tap water have PFAS?
California Water Service – Dominguez had 1 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.
Do Torrance homes have lead pipes?
Census estimates put 82% of Torrance 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 – Dominguez'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.