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Water system · PWSID CA2700728

SAN ARDO WD

SAN ARDO, CA · ~575 people served

Check your exact address → SAN ARDO overview
85
Excellent
PurityRadar safety score

PWSID

CA2700728

State

California

City

SAN ARDO

Population served

575

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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

12

Violations on record

2

Unaddressed

4

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Feb 2015. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Monitoring & reporting · Nitrate began Jan 2013 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2011 Resolved
Monitoring & reporting · Total coliform began Dec 2011 Resolved
Max contaminant level (MCL) · Total coliform health-based began Sep 2001 Resolved
Max contaminant level (MCL) · Total coliform health-based began Aug 2001 Resolved
Monitoring & reporting · Total coliform began Jul 2001 Resolved
Monitoring & reporting · Total coliform began Jun 2001 Resolved
Monitoring & reporting · Total coliform began Jul 1999 Resolved
Monitoring & reporting · Total coliform began Jun 1997 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

  • State action · SIE Feb 2015
  • State action · SIA Feb 2015
  • State action · SIA Feb 2015
  • State action · SFJ Feb 2015
  • State action · SIA Feb 2015
  • State action · SIA Feb 2015
  • State action · SOX Jan 2015
  • State action · SIA Feb 2014

This profile is built from EPA public records for system CA2700728 — 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.