PWSID
CA5510028
State
California
City
SONORA
Population served
826
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
No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.
Violations & enforcement
3
Violations on record
0
Unaddressed
0
Health-based
6
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →
Recent enforcement actions
- State action · SOX Sep 2025
- State action · SFJ Aug 2025
- State action · SIA May 2002
- State action · SOX Sep 2001
- State action · SOX Oct 1993
- State action · SFJ Oct 1993
This profile is built from EPA public records for system CA5510028 — 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.