How much wastewater does Fergus Falls WWTP treat?

Fergus Falls WWTP treats an average of 1.44 MGD and is permitted for a design flow of 2.81 MGD.

What treatment technology does Fergus Falls WWTP use?

Klarifi has identified clarifiers, biogas silos at the Fergus Falls facility.

What is the NPDES permit for Fergus Falls WWTP?

The facility discharges under NPDES permit MN0050628, currently effective, expiring August 2028.

Is Fergus Falls WWTP in compliance?

Discharge monitoring reports show 2 violations at Fergus Falls WWTP in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Fergus Falls WWTP and how do I contact them?

Fergus Falls WWTP is a publicly owned treatment works in Fergus Falls, Minnesota. Klarifi lists 2 verified decision-maker contacts for this facility, available with a free trial.

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Fergus Falls WWTP

Fergus Falls, MN · Otter Tail County · Publicly Owned Treatment Works

Average flow: 1.44 MGD

Design flow: 2.81 MGD

NPDES permit: MN0050628; Effective

Permit expires: August 2028

Population served: 14,119; CWNS 2022

Fergus Falls WWTP is a publicly owned wastewater treatment works in Fergus Falls, Otter Tail County, Minnesota treating an average of 1.44 million gallons per day against a permitted design capacity of 2.81 MGD, serving about 14,119 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit MN0050628 (effective), which expires in August 2028, with 2 recorded violations in the last three years.

Treatment technology

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

Clarifiers

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Biogas silos

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Compliance snapshot (last 3 years)

Total violations: 2

Effluent violations: 2

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

2 verified contacts for Fergus Falls WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Fergus Falls WWTP, plus the full compliance history and discharge data.

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Fergus Falls 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 3, 2025.

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