Great Falls WTP
Great Falls, MT · Cascade County · Publicly Owned Treatment Works
- Average flow
- 0.27 MGD
- Design flow
- —
- NPDES permit
- MT0000442
- Effective
- Permit expires
- May 2029
- Population served
- —
- CWNS 2022
Great Falls WTP is a publicly owned wastewater treatment plant in Great Falls, Cascade County, Montana treating an average of 0.27 million gallons per day. It discharges under NPDES permit MT0000442 (effective), which expires in May 2029, 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 Great Falls WTP.
No verified contacts on file yet
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Nearby wastewater treatment plants in Montana
Great Falls · 2 mi away
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Great Falls · 9 mi away
0.05 MGD
Stockett · 11 mi away
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Vaughn · 12 mi away
0.03 MGD
Belt · 20 mi away
—
Highwood · 24 mi away
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Fairfield · 33 mi away
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Fort Benton · 39 mi away
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Great Falls WTP: 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 July 18, 2023.