Home/ Directory/ CA/ SAN JOAQUIN, CITY OF

Water system · PWSID CA1010034

SAN JOAQUIN, CITY OF

SAN JOAQUIN, CA · ~4,060 people served

Check your exact address → SAN JOAQUIN overview
100
Excellent
PurityRadar safety score

PWSID

CA1010034

State

California

City

SAN JOAQUIN

Population served

4,060

Primary source

Groundwater

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 Sep 2023). Levels in parts per trillion (ppt).

Lithium

18,800 ppt

limit —

No federal limit

Violations & enforcement

19

Violations on record

0

Unaddressed

13

Health-based

34

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2010. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began Sep 2010 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2005 Resolved
Monitoring & reporting · Nitrate began Jan 2005 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jul 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Mar 2004 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jan 2004 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Apr 2003 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2003 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jun 2001 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 2000 Resolved
Monitoring & reporting · Nitrate began Jan 2000 Resolved

Recent enforcement actions

  • State action · SFL Dec 2010
  • State action · SOX Oct 2010
  • State action · SFL Oct 2010
  • State action · SOX Apr 2009
  • State action · SIA Apr 2006
  • State action · SFL Sep 2005
  • State action · SOX Jul 2005
  • State action · SOX Jan 2005

This profile is built from EPA public records for system CA1010034 — 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.