PWSID
WA5397750
State
Washington
City
Winthrop
Population served
1,350
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
11
Violations on record
0
Unaddressed
0
Health-based
19
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Sep 2025. Official EPA record →
Recent enforcement actions
- State action · SOX Sep 2025
- State action · SOX Feb 2025
- State action · SOX Jan 2025
- State action · SOX Jan 2025
- State action · SOX Sep 2024
- State action · SOX Jul 2024
- State action · SOX Feb 2018
- State action · SOX Nov 2016
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
1 station · latest Jun 2023
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system WA5397750 — 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.