Columbia Falls WWTP
Columbia Falls, MT · Flathead County · Publicly Owned Treatment Works
- Average flow
- 0.43 MGD
- Design flow
- —
- NPDES permit
- MT0020036
- Effective
- Permit expires
- May 2030
- Population served
- 3,643
- CWNS 2022
Columbia Falls WWTP is a publicly owned wastewater treatment works in Columbia Falls, Flathead County, Montana treating an average of 0.43 million gallons per day, serving about 3,643 residents. It discharges under NPDES permit MT0020036 (effective), which expires in May 2030, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Columbia Falls WWTP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Columbia Falls WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Montana
Kalispell · 13 mi away
3.21 MGD
Bigfork · 21 mi away
0.32 MGD
Bigfork · 25 mi away
0.0043 MGD
Polson · 34 mi away
0.01 MGD
Polson · 46 mi away
0.5 MGD
Eureka · 54 mi away
0.09 MGD
Hot Springs · 55 mi away
0.1 MGD
Ronan · 58 mi away
0.2 MGD
Columbia Falls 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 August 18, 2026.