SIERRA MOON MUTUAL WATER COMPANY

CHICO, CA · ~120 people served

Check your exact address → CHICO overview

Excellent

PurityRadar safety score

PWSID

CA0409183

State

California

City

CHICO

Population served

120

Primary source

Groundwater

Score history

No change since tracking began Jun 18, 2026.

Jun 18, 2026 · score 85 Jun 18, 2026 · score 85

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 Nov 2023. Official EPA record →

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed

Treatment technique · EPA contaminant 5200 health-based began Oct 2024 Unaddressed

Monitoring · Lead & Copper Rule began Sep 2023 Resolved

Monitoring & reporting · Nitrate began Jan 2022 Resolved

Monitoring & reporting · Arsenic began Jan 2020 Resolved

Monitoring · Lead & Copper Rule began Apr 2018 Resolved

Monitoring · Lead & Copper Rule began May 2017 Resolved

Monitoring & reporting · Total coliform began Mar 2014 Resolved

Monitoring & reporting · Total coliform began Feb 2014 Resolved

Monitoring & reporting · Total coliform began Dec 2012 Resolved

Monitoring & reporting · Uranium began Jan 2009 Resolved

Recent enforcement actions

State action · SFJ Nov 2023
State action · SOX Oct 2023
State action · SFL Feb 2023
State action · SOX Feb 2023
State action · SOX May 2018
State action · SFJ May 2018
State action · SFJ Jul 2017
State action · SOX Jul 2017

This profile is built from EPA public records for system CA0409183 — 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.