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Water system · PWSID OR4100229

RIDGEWOOD DIST IMPROV CO

CORVALLIS, OR · ~90 people served

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

PWSID

OR4100229

State

Oregon

City

CORVALLIS

Population served

90

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

24

Violations on record

0

Unaddressed

11

Health-based

21

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →

Max contaminant level (MCL) · Lead & Copper Rule health-based began Mar 2025 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2007 Resolved
Monitoring & reporting · Total coliform began Jan 2007 Resolved
Monitoring & reporting · Total coliform began Jan 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2006 Resolved
Monitoring & reporting · Total coliform began Nov 2006 Resolved
Max contaminant level (MCL) · Total coliform health-based began Oct 2006 Resolved
Monitoring & reporting · Nitrate began Jan 2004 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 1999 Resolved
Monitoring & reporting · Total coliform began Nov 1999 Resolved
Monitoring & reporting · Total coliform began Nov 1999 Resolved

Recent enforcement actions

  • State action · SOX Jun 2025
  • State action · SIF Mar 2025
  • State action · SIE Mar 2025
  • State action · SOX Aug 2007
  • State action · SOX Jun 2005
  • State action · SOX Mar 2005
  • State action · SOX May 2002
  • State action · SOX Jul 2001

This profile is built from EPA public records for system OR4100229 — 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.