Is Colton, 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 West Valley Water District.
2 public water systems serve parts of Colton. The largest, West Valley Water District, serves 96,123 people, and one system here had PFAS above a federal limit. Your water bill names your system.
Largest system
West Valley Water District
96,123 people · Surface water · EPA ID CA3610004
Buys treated water from City of Rialto, San Bernardino Valley Water District.
| 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 2024, 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.
Colton 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 Colton city (tables B25034, B25003). Estimates for small places have a margin of error.
Other water systems serving Colton
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Loma Linda 4 mi City of Loma Linda | None above limits | 0 ppb |
| Rialto 6 mi West Valley Water District | None above limits | 0 ppb |
| San Bernardino 6 mi City of San Bernardino | None above limits | 0 ppb |
| Fontana 9 mi San Gabriel Valley Water Company – Fontana | None above limits | 0 ppb |
| Redlands 9 mi Redlands City Municipal Utility District – Water Division | Above limit | 2.9 ppb |
| Jurupa Valley 9 mi Jurupa Community Services District | None above limits | 0 ppb |
Colton ZIP codes (1)
- 92324
Questions
Is Colton tap water safe to drink?
West Valley Water 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 Colton, CA?
2 public water systems serve parts of Colton. The largest is West Valley Water District (96,123 people). Your water bill names your system. The EPA ID is also on your utility's Consumer Confidence Report.
Does Colton tap water have PFAS?
None detected above EPA's reporting limits. West Valley Water District 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 Colton homes have lead pipes?
Census estimates put 51% of Colton 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. West Valley Water District'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.