Is Livermore, 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 City of Livermore.
City of Livermore supplies Livermore (38,892 people).
Water system
City of Livermore
38,892 people · Purchased surface water · EPA ID CA0110011
Buys treated water from Zone 7 Water Agency.
| 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 (Dec 2025, 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.
Livermore 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 Livermore city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Pleasanton 7 mi City of Pleasanton | Above limit | 0 ppb |
| Dublin 8 mi East Bay Municipal Utility District | None above limits | 0 ppb |
| San Ramon 11 mi East Bay Municipal Utility District | None above limits | 0 ppb |
| Mountain House 13 mi City of Mountain House | None above limits | 0 ppb |
| Danville 14 mi East Bay Municipal Utility District | None above limits | 0 ppb |
| Union City 15 mi Alameda County Water District | None above limits | 0 ppb |
Livermore ZIP codes (1)
- 94550
Questions
Is Livermore tap water safe to drink?
City of Livermore 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 Livermore, CA?
City of Livermore, which serves 38,892 people.
Does Livermore tap water have PFAS?
None detected above EPA's reporting limits. City of Livermore 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 Livermore homes have lead pipes?
Census estimates put 52% of Livermore 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. City of Livermore'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.