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Water system · PWSID OR4100379

JOINT WATER COMMISSION

HILLSBORO, OR

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

PWSID

OR4100379

State

Oregon

City

HILLSBORO

Population served

—

Primary source

Surface water

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

53

Violations on record

0

Unaddressed

0

Health-based

26

Enforcement actions

From EPA ECHO (SDWIS), most recent enforcement May 2023. Official EPA record →

Monitoring & reporting · EPA contaminant 0200 began Mar 2023 Resolved
Monitoring & reporting · EPA contaminant 0300 began Mar 2023 Resolved
Monitoring & reporting · EPA contaminant 0200 began Mar 2023 Resolved
Monitoring & reporting · Lead & Copper Rule began Jan 2023 Resolved
Monitoring & reporting · EPA contaminant 0300 began Sep 2020 Resolved
Monitoring & reporting · EPA contaminant 0200 began Sep 2020 Resolved
Monitoring & reporting · EPA contaminant 0200 began Sep 2020 Resolved
Monitoring & reporting · Lead & Copper Rule began Jul 2020 Resolved
Monitoring & reporting · EPA contaminant 2380 began Jan 2007 Resolved
Monitoring & reporting · Nitrate began Jan 2007 Resolved
Monitoring & reporting · Arsenic began Jan 2007 Resolved
Monitoring & reporting · EPA contaminant 2976 began Jan 2007 Resolved

Recent enforcement actions

  • State action · SOX May 2023
  • State action · SOX May 2023
  • State action · SOX Nov 2020
  • State action · SOX Nov 2020
  • State action · SOX Aug 2008
  • State action · SOX Jan 2007
  • State action · SOX Jan 2007
  • State action · SOX Jan 2007

This profile is built from EPA public records for system OR4100379 — 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.