How much wastewater does Hobson Sewage Treatment Plant treat?

Hobson Sewage Treatment Plant is permitted for a design flow of 0.04 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Hobson Sewage Treatment Plant use?

Klarifi has identified uncovered lagoons, lagoon, facultative at the Hobson facility.

What is the NPDES permit for Hobson Sewage Treatment Plant?

The facility discharges under NPDES permit MT0021636, currently administratively continued, expiring August 2024.

Is Hobson Sewage Treatment Plant in compliance?

Discharge monitoring reports show 42 violations at Hobson Sewage Treatment Plant in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Hobson Sewage Treatment Plant and how do I contact them?

Hobson Sewage Treatment Plant is a publicly owned treatment works in Hobson, Montana. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Hobson Sewage Treatment Plant

Hobson, MT · Judith Basin County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.04 MGD

NPDES permit: MT0021636; Administratively continued

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. Treatment on site includes uncovered lagoons, lagoon, facultative. It discharges under NPDES permit MT0021636 (administratively continued), which expires in August 2024, with 42 recorded violations in the last three years.

Treatment technology

Treatment structures identified at this facility. Exact unit counts are available in Klarifi.

Uncovered lagoons

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Lagoon, Facultative

unit process

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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.

No verified contacts on file yet

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Nearby wastewater treatment plants in Montana

Lewistown WWTP

Lewistown · 21 mi away

2.38 MGD

Town Of Denton WWTP

Denton · 22 mi away

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City Of Harlowton WWTF

Harlowton · 40 mi away

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Town Of Geraldine WWTF

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Town Of Belt - WWTP

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White Sulphur Springs WWTF

White Sulphur Springs · 59 mi away

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Highwood WWTP

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Stockett Water And Sewer District Domestic Wastewater Treatment Facility

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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 September 11, 2026; facility record last updated November 8, 2025.

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