TUD - SONORA/JAMESTOWN WATER SYSTEM

SONORA, CA · ~11,054 people served

Check your exact address → SONORA overview

100

Excellent

PurityRadar safety score

PWSID

CA5510001

State

California

City

SONORA

Population served

11,054

Primary source

Surface water

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 100 Jun 18, 2026 · score 100

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 Jun 2024). Levels in parts per trillion (ppt).

Lithium

12,500 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →

Monitoring · Lead & Copper Rule began Apr 2025 Resolved

Monitoring & reporting · Total coliform began Jul 2005 Resolved

Monitoring & reporting · Total coliform began Jun 2005 Resolved

Treatment technique · EPA contaminant 0200 health-based began Mar 1995 Resolved

Treatment technique · EPA contaminant 0200 health-based began Feb 1995 Resolved

Recent enforcement actions

State action · SOX Sep 2025
State action · SFJ Aug 2025
State action · SIA Sep 2005
State action · SOX Aug 2005
State action · SOX Jul 2005
EPA/federal action · EOX Mar 2000
State action · SFJ Apr 1995
State action · SOX Apr 1995

This profile is built from EPA public records for system CA5510001 — 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.