GREEN RIVER MUTUAL WATER CO.

PASO ROBLES, CA · ~350 people served

Check your exact address → PASO ROBLES overview

Excellent

PurityRadar safety score

PWSID

CA4000554

State

California

City

PASO ROBLES

Population served

350

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 Jan 2019. Official EPA record →

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

Reporting · EPA contaminant 5200 began Oct 2024 Unaddressed

Monitoring & reporting · Lead & Copper Rule began Oct 2017 Resolved

Monitoring & reporting · Nitrate began Jan 2017 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2005 Resolved

Monitoring & reporting · Total coliform began Jun 2004 Resolved

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

Recent enforcement actions

State action · SOX Jan 2019
State action · SOX Dec 2018
State action · SFL Nov 2018
State action · SFL Mar 2018
State action · SOX Aug 2005
State action · SIE Aug 2005
State action · SIE Aug 2005
State action · SOX Jul 2004

This profile is built from EPA public records for system CA4000554 — 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.