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Water system · PWSID OR4100232

COLORADO LAKE COOP

CORVALLIS, OR · ~80 people served

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

PWSID

OR4100232

State

Oregon

City

CORVALLIS

Population served

80

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

23

Violations on record

0

Unaddressed

9

Health-based

24

Enforcement actions

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

Other · EPA contaminant 7000 began Jul 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2024 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2022 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2020 Resolved
Monitoring · Lead & Copper Rule began Mar 2018 Resolved
Max contaminant level (MCL) · Total coliform health-based began Jan 2009 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2008 Resolved
Max contaminant level (MCL) · Total coliform health-based began Dec 2007 Resolved
Max contaminant level (MCL) · Total coliform health-based began Nov 2007 Resolved

Recent enforcement actions

  • State action · SOX Jan 2025
  • State action · SOX Nov 2024
  • State action · SOX Sep 2022
  • State action · SOX Nov 2020
  • State action · SOX May 2020
  • State action · SOX Apr 2018
  • State action · SOX Jan 2011
  • State action · SOX Jan 2009

This profile is built from EPA public records for system OR4100232 — 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.