DEL ORO WATER CO. - HAT CREEK DISTRICT

CHICO, CA · ~185 people served

Check your exact address → CHICO overview

100

Excellent

PurityRadar safety score

PWSID

CA4500022

State

California

City

CHICO

Population served

185

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 Feb 2017. Official EPA record →

Monitoring & reporting · EPA contaminant 0200 began Oct 2016 Resolved

Monitoring & reporting · EPA contaminant 0200 began Sep 2016 Resolved

Treatment technique · EPA contaminant 0300 health-based began May 2016 Resolved

Treatment technique · EPA contaminant 0300 health-based began Mar 2016 Resolved

Monitoring & reporting · EPA contaminant 0200 began Mar 2016 Resolved

Monitoring & reporting · EPA contaminant 0200 began Jan 2016 Resolved

Treatment technique · EPA contaminant 0200 health-based began Nov 2013 Resolved

Treatment technique · EPA contaminant 0200 health-based began Oct 2013 Resolved

Treatment technique · EPA contaminant 0200 health-based began Sep 2013 Resolved

Treatment technique · EPA contaminant 0200 health-based began Aug 2013 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jul 2013 Resolved

Treatment technique · EPA contaminant 0200 health-based began Jun 2013 Resolved

Recent enforcement actions

State action · SFL Feb 2017
State action · SOX Nov 2016
State action · SOX Oct 2016
State action · SOX Jun 2016
State action · SOX Jun 2016
State action · SOX Apr 2016
State action · SOX Feb 2016
State action · SOX Jan 2014

This profile is built from EPA public records for system CA4500022 — 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.