Tap Water Results

Is Dublin, 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 East Bay Municipal Utility District. 2 PFAS were detected below the limits.

2 public water systems serve parts of Dublin. The largest, East Bay Municipal Utility District, serves 1.5 million people. Your water bill names your system.

Largest system

East Bay Municipal Utility District

1.5 million people · Surface water · EPA ID CA0110005

Buys treated water from Contra Costa Water District.

PFASHighest averageLimitStatus
PFOA
Not detected
–4 pptNot detected
PFOS
Not detected
–4 pptNot detected
PFHxS
Not detected
–10 pptNot detected
PFNA
Not detected
–10 pptNot detected
HFPO-DA (GenX)
Not detected
–10 pptNot 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.

Lead: 0 ppb at the 90th percentile (Dec 2024, and 9 in 10 homes sampled were at or below it) Below action level
Health-based violations since 2016: 0

Full East Bay Municipal Utility District 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.

Dublin homes and lead pipes

19%
of homes built before 1980 (California 56%, US 50%)
1%
built before 1950 (California 14%)
34%
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. East Bay Municipal Utility District's service line inventory lists 0 lead lines and 3,935 galvanized lines that need replacing (as of 2026-04-21). Look up your address. 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 Dublin city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Dublin

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Pleasanton 3 mi
City of Pleasanton
City of PleasantonAbove limit0 ppb
San Ramon 4 mi
East Bay Municipal Utility District
East Bay Municipal Utility DistrictNone above limits0 ppb
Livermore 8 mi
City of Livermore
City of LivermoreNone above limits0 ppb
Danville 8 mi
East Bay Municipal Utility District
East Bay Municipal Utility DistrictNone above limits0 ppb
Union City 10 mi
Alameda County Water District
Alameda County Water DistrictNone above limits0 ppb
Hayward 13 mi
East Bay Municipal Utility District
East Bay Municipal Utility DistrictNone above limits0 ppb
Dublin ZIP codes (1)
  • 94568

Questions

Is Dublin tap water safe to drink?

East Bay Municipal Utility District 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 Dublin, CA?

2 public water systems serve parts of Dublin. The largest is East Bay Municipal Utility District (1.5 million people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Dublin tap water have PFAS?

East Bay Municipal Utility District had 2 PFAS detected at least once in EPA's 2023–2025 testing, all with averages below the federal limits.

Do Dublin homes have lead pipes?

Census estimates put 19% of Dublin 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. East Bay Municipal Utility District's service line inventory lists 0 lead lines. 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.