PWSID
CA4910009
State
California
City
SANTA ROSA
Population served
175,396
Primary source
Groundwater
Score history
No change since tracking began Jun 18, 2026.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Nov 2024). Levels in parts per trillion (ppt).
Lithium
95,000 ppt
limit —
Violations & enforcement
No violations are on record for this system in EPA’s SDWIS/ECHO data.
This profile is built from EPA public records for system CA4910009 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.