City Of Polson WWTP
Polson, MT · Lake County · Publicly Owned Treatment Works
- Average flow
- 0.5 MGD
- Design flow
- 0.65 MGD
- NPDES permit
- MT0020559
- Administratively continued
- Permit expires
- August 2024
- Population served
- 5,148
- CWNS 2022
City Of Polson WWTP is a publicly owned wastewater treatment works in Polson, Lake County, Montana treating an average of 0.5 million gallons per day against a permitted design capacity of 0.65 MGD, serving about 5,148 residents. It discharges under NPDES permit MT0020559 (administratively continued), which expires in August 2024, 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
Decision-makers at City Of Polson WWTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Montana
Ronan · 12 mi away
0.2 MGD
Pablo · 13 mi away
—
Polson · 14 mi away
0.01 MGD
Hot Springs · 23 mi away
0.1 MGD
Bigfork · 26 mi away
0.0043 MGD
Bigfork · 26 mi away
0.32 MGD
St. Ignatius · 26 mi away
0.04 MGD
Kalispell · 34 mi away
3.21 MGD
City Of Polson 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 March 23, 2025.