City Of Hamilton Wastewater Treatment Plant
Hamilton, MT · Ravalli County · Publicly Owned Treatment Works
- Average flow
- 0.79 MGD
- Design flow
- —
- NPDES permit
- MT0020028
- Effective
- Permit expires
- December 2026
- Population served
- 4,784
- CWNS 2022
City Of Hamilton Wastewater Treatment Plant is a publicly owned wastewater treatment works in Hamilton, Ravalli County, Montana treating an average of 0.79 million gallons per day, serving about 4,784 residents. Treatment on site includes carrousels / oxidation ditches. It discharges under NPDES permit MT0020028 (effective), which expires in December 2026, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Carrousels / oxidation ditches
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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 Hamilton Wastewater Treatment Plant.
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Nearby wastewater treatment plants in Montana
Darby · 16 mi away
—
Stevensville · 18 mi away
0.21 MGD
Philipsburg · 41 mi away
0.07 MGD
Missoula · 44 mi away
7.52 MGD
Alberton · 54 mi away
0.02 MGD
Anaconda · 62 mi away
0.66 MGD
Warm Springs · 66 mi away
0.12 MGD
Deer Lodge · 69 mi away
0.72 MGD
City Of Hamilton Wastewater Treatment Plant: 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 February 16, 2025.