SONORA WATER RESOURCES, INC

CLAREMONT, CA · ~1,154 people served

Check your exact address → CLAREMONT overview

100

Excellent

PurityRadar safety score

PWSID

CA5510024

State

California

City

CLAREMONT

Population served

1,154

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

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2005. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Jan 2006 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 1996 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SOX Dec 2005
State action · SFL Dec 2005
EPA/federal action · EOX Sep 2005
State action · SOX Jun 2002
State action · SIA May 2002

This profile is built from EPA public records for system CA5510024 — 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.