DEL ORO WATER COMPANY - BUZZTAIL DIST.

CHICO, CA · ~106 people served

Check your exact address → CHICO overview

100

Excellent

PurityRadar safety score

PWSID

CA0400091

State

California

City

CHICO

Population served

106

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 Jan 2019. Official EPA record →

Monitoring & reporting · Total coliform began Jun 2010 Resolved

Max contaminant level (MCL) · Total coliform health-based began May 2010 Resolved

Monitoring & reporting · Total coliform began May 2010 Resolved

Monitoring & reporting · Uranium began Jan 2007 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2007 Resolved

Monitoring & reporting · EPA contaminant 2990 began Jan 2007 Resolved

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

Recent enforcement actions

State action · SOX Jan 2019
State action · SOX Feb 2018
State action · SOX Jun 2010
State action · SOX Jun 2010
State action · SFH May 2010
State action · SIA May 2010
State action · SIA Sep 2008
State action · SIA Sep 2008

This profile is built from EPA public records for system CA0400091 — 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.