PWSID
OR4100189
State
Oregon
City
LAKE OSWEGO
Population served
110
Primary source
Groundwater
Score history
No change since tracking began Jun 18, 2026.
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
157
Violations on record
0
Unaddressed
7
Health-based
58
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jun 2025. Official EPA record →
Recent enforcement actions
- State action · SIF Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
- State action · SOX Jun 2025
This profile is built from EPA public records for system OR4100189 — 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.