Long Prairie WWTP
Long Prairie, MN · Todd County · Publicly Owned Treatment Works
- Average flow
- 1.51 MGD
- Design flow
- 8.6 MGD
- NPDES permit
- MN0066079
- Administratively continued
- Permit expires
- April 2023
- Population served
- —
- CWNS 2022
Long Prairie WWTP is a publicly owned wastewater treatment works in Long Prairie, Todd County, Minnesota treating an average of 1.51 million gallons per day against a permitted design capacity of 8.6 MGD. Treatment on site includes aerated lagoons, covered lagoons, uncovered lagoons, biogas balloons. It discharges under NPDES permit MN0066079 (administratively continued), which expires in April 2023, with 2 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Covered lagoons
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Uncovered lagoons
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Long Prairie WWTP.
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Nearby wastewater treatment plants in Minnesota
Browerville · 6 mi away
—
Swanville · 12 mi away
0.02 MGD
Grey Eagle · 13 mi away
—
Osakis · 17 mi away
—
Flensburg · 18 mi away
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Sauk Centre · 19 mi away
0.56 MGD
Miltona · 19 mi away
—
Randall · 20 mi away
0.06 MGD
Long Prairie 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 October 30, 2025.