Hobson Sewage Treatment Plant
East End Of 1st St South, Hobson, MT 59452 · Judith Basin County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- MT0021636
- Terminated
- Permit expires
- August 2024
- Population served
- 230
- CWNS 2022
Hobson Sewage Treatment Plant is a publicly owned wastewater treatment works in Hobson, Judith Basin County, Montana, serving about 230 residents. It discharges under NPDES permit MT0021636 (terminated), which expires in August 2024, with 42 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Hobson Sewage Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Hobson Sewage Treatment Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 42
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Hobson Sewage Treatment Plant.
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Highwood · 60 mi away
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Hobson Sewage 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 October 26, 2026; facility record last updated November 8, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms