GRASS VALLEY WATER SYSTEM

GRASS VALLEY, OR · ~184 people served

Check your exact address → GRASS VALLEY overview

100

Excellent

PurityRadar safety score

PWSID

OR4100356

State

Oregon

City

GRASS VALLEY

Population served

184

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 Aug 2025. Official EPA record →

Monitoring & reporting · Lead & Copper Rule began Oct 2022 Resolved

Monitoring & reporting · Total coliform began Sep 2011 Resolved

Max contaminant level (MCL) · Total coliform health-based began Jul 2009 Resolved

Monitoring & reporting · Nitrate began Jan 2009 Resolved

Monitoring & reporting · Total coliform began Jul 2007 Resolved

Monitoring & reporting · Nitrate began Jan 2007 Resolved

Monitoring & reporting · Total coliform began May 2005 Resolved

Monitoring & reporting · Nitrate began Jan 2005 Resolved

Monitoring & reporting · Lead & Copper Rule began Jan 2005 Resolved

Max contaminant level (MCL) · Total coliform health-based began Sep 2004 Resolved

Other · EPA contaminant 7000 began Jul 2004 Resolved

Monitoring & reporting · Nitrate began Jan 2004 Resolved

Recent enforcement actions

State action · SOX Aug 2025
State action · SIA Oct 2011
State action · SOX Oct 2011
State action · SOX Nov 2010
EPA/federal action · EOX Jun 2010
State action · SIA Feb 2010
State action · SIA Aug 2009
State action · SOX Aug 2009

This profile is built from EPA public records for system OR4100356 — 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.