Gwinner, City Of
Gwinner, ND · Sargent County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.001 MGD
- NPDES permit
- ND0020010
- Effective
- Permit expires
- September 2029
- Population served
- 675
- CWNS 2022
Gwinner, City Of is a publicly owned wastewater treatment plant in Gwinner, Sargent County, North Dakota, serving about 675 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit ND0020010 (effective), which expires in September 2029, with 40 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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Compliance snapshot (last 3 years)
- Total violations
- 40
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Gwinner, City Of, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Gwinner, City Of, plus the full compliance history and discharge data.
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Rutland · 15 mi away
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Wyndmere · 26 mi away
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Sheldon · 26 mi away
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Gwinner, City Of: 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 20, 2025.