Tap Water Results

Is Pittsburg, 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 Pittsburg.

2 public water systems serve parts of Pittsburg. The largest, City of Pittsburg, serves 62,500 people. Your water bill names your system.

Largest system

City of Pittsburg

62,500 people · Purchased surface water · EPA ID CA0710008

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 City of Pittsburg 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.

Pittsburg homes and lead pipes

44%
of homes built before 1980 (California 56%, US 50%)
8%
built before 1950 (California 14%)
38%
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. 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 Pittsburg city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Pittsburg

  • Golden State Water Company – Bay Point
    23,765 people · Purchased surface water · California · reported ZIPs here
    No PFAS above limits

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Antioch 6 mi
City of Antioch
City of AntiochNone above limits0 ppb
Concord 6 mi
Contra Costa Water District
Contra Costa Water DistrictNone above limits0 ppb
Pleasant Hill 11 mi
East Bay Municipal Utility District
East Bay Municipal Utility DistrictNone above limits0 ppb
Walnut Creek 11 mi
East Bay Municipal Utility District
East Bay Municipal Utility DistrictNone above limits0 ppb
Oakley 11 mi
Diablo Water District
Diablo Water DistrictNone above limits1.9 ppb
Brentwood 11 mi
Brentwood Water System
Brentwood Water SystemNone above limits0 ppb
Pittsburg ZIP codes (1)
  • 94565

Questions

Is Pittsburg tap water safe to drink?

City of Pittsburg 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 Pittsburg, CA?

2 public water systems serve parts of Pittsburg. The largest is City of Pittsburg (62,500 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Pittsburg tap water have PFAS?

None detected above EPA's reporting limits. City of Pittsburg 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 Pittsburg homes have lead pipes?

Census estimates put 44% of Pittsburg 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 Pittsburg'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.