Home/ Directory/ CA/ CHESTER PUBLIC U.D.

Water system · PWSID CA3210009

CHESTER PUBLIC U.D.

CHESTER, CA · ~2,187 people served

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

PWSID

CA3210009

State

California

City

CHESTER

Population served

2,187

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

6

Violations on record

0

Unaddressed

6

Health-based

12

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2021. Official EPA record →

Max contaminant level (MCL) · Lead & Copper Rule health-based began Oct 2021 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2002 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2002 Resolved

Recent enforcement actions

  • State action · SFL Dec 2021
  • State action · SOX Nov 2021
  • State action · SFH Nov 2021
  • State action · SFL Dec 2013
  • State action · SOX Nov 2013
  • State action · SOX Oct 2013
  • State action · SOX Dec 2006
  • State action · SIA Dec 2006

Area water-quality monitoring

Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.

ContaminantMedian · max · samples

Nitrate

1 station · latest Oct 2020

0.799 · max 0.799 mg/l as N · 2

Arsenic

1 station · latest Oct 2020

0.42 · max 0.42 ug/l · 1

Atrazine

1 station · latest Oct 2020

0.058 · max 0.058 ug/l · 1

Copper

1 station · latest Oct 2020

0.86 · max 0.86 ug/l · 1

Fluoride

1 station · latest Oct 2020

0.01 · max 0.01 mg/l · 1

Lead

1 station · latest Oct 2020

0.281 · max 0.281 ug/l · 1

Manganese

1 station · latest Oct 2020

0.54 · max 0.54 ug/l · 1

Uranium

1 station · latest Oct 2020

0.327 · max 0.327 ug/l · 1

Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.

This profile is built from EPA public records for system CA3210009 — 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.