Libby WWTP
Libby, MT · Lincoln County · Publicly Owned Treatment Works
- Average flow
- 0.23 MGD
- Design flow
- —
- NPDES permit
- MTR000752
- Effective
- Permit expires
- January 2028
- Population served
- 2,879
- CWNS 2022
Libby WWTP is a publicly owned wastewater treatment works in Libby, Lincoln County, Montana treating an average of 0.23 million gallons per day, serving about 2,879 residents. Treatment on site includes carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit MTR000752 (effective), which expires in January 2028, with 34 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 34
- Effluent violations
- 5
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Libby WWTP.
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Nearby wastewater treatment plants in Montana
Troy · 16 mi away
0.1 MGD
Eureka · 40 mi away
0.09 MGD
Thompson Falls · 56 mi away
0.05 MGD
Kalispell · 60 mi away
3.21 MGD
Columbia Falls · 62 mi away
0.43 MGD
Hot Springs · 69 mi away
0.1 MGD
Plains · 71 mi away
0.1 MGD
Bigfork · 72 mi away
0.32 MGD
Libby WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 13, 2025.