PWSID
WA5335450
State
Washington
City
MONTESANO
Population served
971
Primary source
GWP
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
1
Violations on record
0
Unaddressed
0
Health-based
5
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jan 2000. Official EPA record →
Recent enforcement actions
- State action · SOX Jan 2000
- State action · SID Jul 1991
- State action · SID Jun 1991
- State action · SID May 1991
- State action · SID Apr 1991
This profile is built from EPA public records for system WA5335450 — 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.