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Water system · PWSID CA1910041

THREE VALLEYS MWD

100
Excellent
PurityRadar safety score

PWSID

CA1910041

State

California

City

CLAREMONT

Population served

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

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

1

Violations on record

0

Unaddressed

0

Health-based

1

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Nov 2003. Official EPA record →

Other began Nov 2003 Resolved

Recent enforcement actions

  • State action · SOX Nov 2003

This profile is built from EPA public records for system CA1910041 — 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.