CALLAHAN WATER DISTRICT

CALLAHAN, CA · ~70 people served

Check your exact address → CALLAHAN overview

100

Excellent

PurityRadar safety score

PWSID

CA4700503

State

California

City

CALLAHAN

Population served

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Mar 2020. Official EPA record →

Other · EPA contaminant 7000 began Jul 2018 Resolved

Treatment technique · EPA contaminant 0800 health-based began Oct 2016 Resolved

Monitoring & reporting · Total coliform began Feb 2013 Resolved

Monitoring & reporting · Total coliform began Sep 1997 Resolved

Monitoring & reporting · Total coliform began Aug 1997 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jun 1993 Resolved

Recent enforcement actions

State action · SOX Mar 2020
State action · SFJ Jan 2019
State action · SOX Mar 2018
State action · SOX Mar 2018
State action · SFH Nov 2016
State action · SOX Nov 2016
State action · SFH Nov 2016
State action · SFL Oct 2014

This profile is built from EPA public records for system CA4700503 — 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.