Home/ Directory/ CA/ DEL ORO RIVER ISLAND SERV TERR #1

Water system · PWSID CA5400665

DEL ORO RIVER ISLAND SERV TERR #1

CHICO, CA · ~1,280 people served

Check your exact address → CHICO overview
100
Excellent
PurityRadar safety score

PWSID

CA5400665

State

California

City

CHICO

Population served

1,280

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

32

Violations on record

0

Unaddressed

22

Health-based

30

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Apr 2019. Official EPA record →

Max contaminant level (MCL) · Nitrate health-based began Jul 2017 Resolved
Monitoring & reporting · Nitrate began Jul 2016 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2012 Resolved
Max contaminant level (MCL) · Nitrate health-based began Jan 2008 Resolved
Max contaminant level (MCL) · Nitrate health-based began Oct 2007 Resolved
Max contaminant level (MCL) · Nitrate health-based began Jul 2007 Resolved
Monitoring & reporting · Total coliform began Mar 2007 Resolved
Max contaminant level (MCL) · Nitrate health-based began Jul 2006 Resolved
Monitoring & reporting · Lead & Copper Rule began Oct 2005 Resolved
Max contaminant level (MCL) · Nitrate health-based began Jul 2005 Resolved
Monitoring & reporting · Total coliform began Jun 2005 Resolved
Max contaminant level (MCL) · Nitrate health-based began Apr 2005 Resolved

Recent enforcement actions

  • State action · SOX Apr 2019
  • State action · SOX Mar 2018
  • State action · SFL Nov 2017
  • State action · SIA May 2015
  • State action · SFL Nov 2011
  • State action · SFL Oct 2008
  • State action · SIA May 2007
  • State action · SIA Apr 2006

This profile is built from EPA public records for system CA5400665 — 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.