DURHAM IRRIGATION DISTRICT

DURHAM, CA · ~1,581 people served

Check your exact address → DURHAM overview

100

Excellent

PurityRadar safety score

PWSID

CA0410003

State

California

City

DURHAM

Population served

1,581

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

Violations on record

Unaddressed

Health-based

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jul 2025. Official EPA record →

Monitoring & reporting · Nitrate began Jan 2024 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 2001 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 2000 Resolved

Max contaminant level (MCL) · Total coliform health-based began Aug 1994 Resolved

Monitoring & reporting · Lead & Copper Rule began Jul 1993 Resolved

Recent enforcement actions

State action · SOX Jul 2025
State action · SFL Mar 2025
State action · SFJ Mar 2015
EPA/federal action · EOX Sep 2005
State action · SIA Nov 2003
State action · SOX Jul 2001
State action · SIE Jul 2001
State action · SOX Sep 2000

This profile is built from EPA public records for system CA0410003 — 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.