PWSID
MT0000450
State
Montana
City
MISSOULA
Population served
78
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
29
Violations on record
1
Unaddressed
2
Health-based
37
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Feb 2026. Official EPA record →
Recent enforcement actions
- State action · SOX Feb 2026
- State action · SIA Jan 2026
- State action · SIE Jan 2026
- State action · SIA Oct 2025
- State action · SIE Oct 2025
- State action · SIA Jan 2014
- State action · SIA Jan 2014
- State action · SIE Jan 2014
This profile is built from EPA public records for system MT0000450 — 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.