PWSID
MT0004423
State
Montana
City
MISSOULA
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
3
Violations on record
0
Unaddressed
0
Health-based
11
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Dec 2007. Official EPA record →
Recent enforcement actions
- State action · SIA Dec 2007
- State action · SOX Dec 2007
- State action · SIE Dec 2007
- State action · SOX Aug 2007
- State action · SIF Jul 2007
- State action · SFO Jul 2007
- State action · SIA Feb 2007
- State action · SIE Feb 2007
This profile is built from EPA public records for system MT0004423 — 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.