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Water system · PWSID CA2010801

VALLEY STATE PRISON

CHOWCHILLA, CA · ~3,173 people served

Check your exact address → CHOWCHILLA overview
100
Excellent
PurityRadar safety score

PWSID

CA2010801

State

California

City

CHOWCHILLA

Population served

3,173

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

27

Violations on record

0

Unaddressed

19

Health-based

24

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Oct 2016. Official EPA record →

Monitoring · Lead & Copper Rule began Jun 2016 Resolved
Monitoring · Lead & Copper Rule began May 2016 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2015 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2014 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2014 Resolved
Max contaminant level (MCL) · Arsenic health-based began Apr 2014 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jan 2014 Resolved
Monitoring & reporting · Total coliform began Jan 2014 Resolved
Max contaminant level (MCL) · Arsenic health-based began Oct 2013 Resolved
Max contaminant level (MCL) · Arsenic health-based began Jul 2013 Resolved
Monitoring & reporting · Total coliform began May 2013 Resolved

Recent enforcement actions

  • State action · SOX Oct 2016
  • State action · SOX Sep 2016
  • State action · SIA Aug 2016
  • State action · SFL Dec 2014
  • State action · SO6 Nov 2014
  • State action · SOX Nov 2014
  • State action · SOX Jul 2014
  • State action · SIA May 2014

This profile is built from EPA public records for system CA2010801 — 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.