PWSID
MT0004869
State
Montana
City
CHINOOK
Population served
100
Primary source
SWP
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
4
Violations on record
0
Unaddressed
0
Health-based
9
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jul 2023. Official EPA record →
Recent enforcement actions
- State action · SOX Jul 2023
- State action · SIA Jul 2023
- State action · SOX Jul 2022
- State action · SIA Jul 2022
- State action · SOX Jul 2020
- State action · SIA Jul 2020
- State action · SIA Dec 2015
- State action · SIE Dec 2015
This profile is built from EPA public records for system MT0004869 — 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.