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Water system · PWSID CA4810003

CITY OF FAIRFIELD

FAIRFIELD, CA · ~120,377 people served

Check your exact address → FAIRFIELD overview
85
Excellent
PurityRadar safety score

PWSID

CA4810003

State

California

City

FAIRFIELD

Population served

120,377

Primary source

Surface water

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

4

Violations on record

2

Unaddressed

2

Health-based

6

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Dec 2007. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed
Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed
Monitoring & reporting · EPA contaminant 0200 began Dec 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began May 1999 Resolved

Recent enforcement actions

  • State action · SOX Dec 2007
  • EPA/federal action · EOX Mar 2000
  • State action · SOX Jun 1999
  • State action · SFJ May 1999
  • EPA/federal action · EOX Dec 1993
  • EPA/federal action · EFL Dec 1992

This profile is built from EPA public records for system CA4810003 — 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.