Is Rocklin, 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 Placer CWA – Foothill.
Placer CWA – Foothill supplies Rocklin (93,417 people).
Water system
Placer CWA – Foothill
93,417 people · Surface water · EPA ID CA3110025
| 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.
Rocklin 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 Rocklin city (tables B25034, B25003). Estimates for small places have a margin of error.
How nearby cities compare
| City | PFAS | Lead (90th pct.) |
|---|---|---|
| Roseville 5 mi City of Roseville | None above limits | 0 ppb |
| Lincoln 5 mi City of Lincoln | None above limits | 0 ppb |
| Citrus Heights 8 mi Sacramento Suburban Water District | None above limits | 0 ppb |
| Folsom 11 mi City of Folsom – Main | None above limits | 0 ppb |
| Rancho Cordova 16 mi California American Water – Suburban Rosemont | Above limit | 0 ppb |
| Sacramento 20 mi City of Sacramento Main | Above limit | 0 ppb |
Rocklin ZIP codes (2)
- 95677
- 95765
Questions
Is Rocklin tap water safe to drink?
Placer CWA – Foothill 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 Rocklin, CA?
Placer CWA – Foothill, which serves 93,417 people.
Does Rocklin tap water have PFAS?
None detected above EPA's reporting limits. Placer CWA – Foothill 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 Rocklin homes have lead pipes?
Census estimates put 15% of Rocklin 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. Placer CWA – Foothill'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.