COLUSA CO. SERVICE AREA #2-STONYFORD

CITY OF COLUSA, CA · ~250 people served

Check your exact address → CITY OF COLUSA overview

100

Excellent

PurityRadar safety score

PWSID

CA0600005

State

California

City

CITY OF COLUSA

Population served

250

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 Mar 2022. Official EPA record →

Monitoring & reporting · EPA contaminant 0200 began Dec 2021 Resolved

Monitoring · Lead & Copper Rule began Jul 2021 Resolved

Other · EPA contaminant 7000 began Jul 2019 Resolved

Monitoring & reporting · Haloacetic acids (HAA5) began Jan 2015 Resolved

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

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

Recent enforcement actions

State action · SOX Mar 2022
State action · SOX Mar 2022
State action · SOX Mar 2022
State action · SFL Feb 2022
State action · SFJ Aug 2021
State action · SOX Jun 2021
State action · SFL Feb 2020
State action · SFL Jun 2016

This profile is built from EPA public records for system CA0600005 — 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.