GSWC - CALIPATRIA

SAN DIMAS, CA · ~7,363 people served

Check your exact address → SAN DIMAS overview

100

Excellent

PurityRadar safety score

PWSID

CA1310003

State

California

City

SAN DIMAS

Population served

7,363

Primary source

SWP

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

Lithium

65,000 ppt

limit —

No federal limit

Violations & enforcement

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2006. Official EPA record →

Treatment technique · EPA contaminant 0300 health-based began Mar 2006 Resolved

Treatment technique · EPA contaminant 0200 health-based began Dec 2004 Resolved

Recent enforcement actions

State action · SIA Jul 2006
State action · SOX Apr 2006
State action · SIA Mar 2006
State action · SOX Mar 2005
State action · SFL Feb 2005
State action · SOX Dec 2004

This profile is built from EPA public records for system CA1310003 — 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.