Tap Water Results

Is Fontana, 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 San Gabriel Valley Water Company – Fontana.

4 public water systems serve parts of Fontana. The largest, San Gabriel Valley Water Company – Fontana, serves 228,270 people. Your water bill names your system.

Largest system

San Gabriel Valley Water Company – Fontana

228,270 people · Surface water · EPA ID CA3610041

Buys treated water from Cucamonga Valley 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 San Gabriel Valley Water Company – Fontana 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.

Fontana homes and lead pipes

28%
of homes built before 1980 (California 56%, US 50%)
4%
built before 1950 (California 14%)
33%
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 Fontana city (tables B25034, B25003). Estimates for small places have a margin of error.

Other water systems serving Fontana

How nearby cities compare

CityMain water systemPFASLead (90th pct.)
Rialto 4 mi
West Valley Water District
West Valley Water DistrictNone above limits0 ppb
Rancho Cucamonga 6 mi
Cucamonga Valley Water District
Cucamonga Valley Water DistrictNone above limits0 ppb
Jurupa Valley 7 mi
Jurupa Community Services District
Jurupa Community Services DistrictNone above limits0 ppb
Colton 9 mi
West Valley Water District
West Valley Water DistrictNone above limits0 ppb
Ontario 9 mi
Cucamonga Valley Water District
Cucamonga Valley Water DistrictNone above limits0 ppb
San Bernardino 10 mi
City of San Bernardino
City of San BernardinoNone above limits0 ppb
Fontana ZIP codes (3)
  • 92335
  • 92336
  • 92337

Questions

Is Fontana tap water safe to drink?

San Gabriel Valley Water Company – Fontana 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 Fontana, CA?

4 public water systems serve parts of Fontana. The largest is San Gabriel Valley Water Company – Fontana (228,270 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.

Does Fontana tap water have PFAS?

None detected above EPA's reporting limits. San Gabriel Valley Water Company – Fontana 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 Fontana homes have lead pipes?

Census estimates put 28% of Fontana 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. San Gabriel Valley Water Company – Fontana'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.