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Water system · PWSID OR4100218

CORNELIUS, CITY OF

CORNELIUS, OR · ~14,490 people served

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

PWSID

OR4100218

State

Oregon

City

CORNELIUS

Population served

14,490

Primary source

SWP

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

39

Violations on record

0

Unaddressed

0

Health-based

34

Enforcement actions

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

Monitoring & reporting · EPA contaminant 3028 began Jan 2024 Resolved
Other · EPA contaminant 7000 began Jul 2023 Resolved
Monitoring & reporting · EPA contaminant 2964 began Jul 2022 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Jul 2022 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Jul 2022 Resolved
Monitoring & reporting · Uranium began Apr 2020 Resolved
Monitoring & reporting · Gross alpha began Apr 2020 Resolved
Monitoring & reporting · Combined radium-226/228 began Apr 2020 Resolved
Monitoring · Lead & Copper Rule began May 2018 Resolved
Monitoring & reporting · Total trihalomethanes (TTHM) began Apr 2014 Resolved
Monitoring & reporting · Haloacetic acids (HAA5) began Apr 2014 Resolved
Monitoring & reporting · Total coliform began May 2013 Resolved

Recent enforcement actions

  • State action · SOX Oct 2025
  • State action · SOX Jul 2023
  • State action · SOX Dec 2022
  • State action · SOX Nov 2022
  • State action · SOX Jun 2021
  • State action · SOX Jun 2021
  • State action · SOX Jul 2018
  • State action · SOX Aug 2014

This profile is built from EPA public records for system OR4100218 — 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.