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Water system · PWSID CA5510851

CDCR - SIERRA CONSERVATION CENTER

JAMESTOWN, CA · ~3,571 people served

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

PWSID

CA5510851

State

California

City

JAMESTOWN

Population served

3,571

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

14

Violations on record

0

Unaddressed

13

Health-based

13

Enforcement actions

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

Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jan 2019 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Oct 2018 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Jul 2018 Resolved
Max contaminant level (MCL) · Haloacetic acids (HAA5) health-based began Apr 2018 Resolved
Monitoring & reporting · Nitrate began Jan 2013 Resolved
Treatment technique · Bromate health-based began Apr 2009 Resolved
Treatment technique · Bromate health-based began Jan 2009 Resolved
Treatment technique · Bromate health-based began Oct 2008 Resolved
Treatment technique · Bromate health-based began Jul 2008 Resolved
Treatment technique · Bromate health-based began Apr 2008 Resolved
Treatment technique · Bromate health-based began Jan 2008 Resolved
Treatment technique · Bromate health-based began Jan 2004 Resolved

Recent enforcement actions

  • State action · SOX Jun 2021
  • State action · SFL Aug 2018
  • State action · SOX Sep 2014
  • State action · SIA Jul 2014
  • State action · SOX Apr 2008
  • State action · SFL Apr 2008
  • State action · SFJ Aug 2005
  • EPA/federal action · EOX Mar 2000

This profile is built from EPA public records for system CA5510851 — 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.