DEL ORO WATER CO.-JOHNSON PARK

CHICO, CA · ~904 people served

Check your exact address → CHICO overview

100

Excellent

PurityRadar safety score

PWSID

CA4510015

State

California

City

CHICO

Population served

904

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 Dec 2003. Official EPA record →

Monitoring & reporting · Total coliform began Dec 2002 Resolved

Monitoring & reporting · Total coliform began Nov 2002 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2002 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jun 2002 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2002 Resolved

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

Max contaminant level (MCL) · Total coliform health-based began Jul 1998 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 1996 Resolved

Max contaminant level (MCL) · Total coliform health-based began Feb 1995 Resolved

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

Recent enforcement actions

EPA/federal action · EOX Dec 2003
State action · SOX Feb 2003
State action · SOX Jan 2003
State action · SIA Jan 2003
State action · SIA Jan 2003
State action · SFL Aug 2002
State action · SOX Aug 2002
State action · SFL Aug 2002

This profile is built from EPA public records for system CA4510015 — 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.