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Water system · PWSID CA5000015

OID #22 - WILLIAMS TRACT

100
Excellent
PurityRadar safety score

PWSID

CA5000015

State

California

City

OAKDALE

Population served

150

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

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

2

Violations on record

0

Unaddressed

2

Health-based

4

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 1997. Official EPA record →

Max contaminant level (MCL) · Total coliform health-based began May 1997 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 1996 Resolved

Recent enforcement actions

  • State action · SOX Jun 1997
  • State action · SIF May 1997
  • State action · SOX Jun 1996
  • State action · SIE May 1996

This profile is built from EPA public records for system CA5000015 — 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.