Butterfield
610 6th St N, Butterfield, MN 56120 · Watonwan County · Publicly Owned Treatment Works
- Average flow
- 0.2 MGD
- Design flow
- 0.29 MGD
- NPDES permit
- MN0022977
- Administratively continued
- Permit expires
- March 2024
- Population served
- 601
- CWNS 2022
Butterfield is a publicly owned wastewater treatment plant in Butterfield, Watonwan County, Minnesota treating an average of 0.2 million gallons per day against a permitted design capacity of 0.29 MGD, serving about 601 residents. It discharges under NPDES permit MN0022977 (administratively continued), which expires in March 2024, with 95 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Butterfield.
Available with a free Klarifi account
See the full treatment train at Butterfield: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 95
- 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 Butterfield.
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Odin · 8 mi away
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Saint James · 9 mi away
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Comfrey · 11 mi away
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La Salle · 13 mi away
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Windom · 15 mi away
0.0021 MGD
Lewisville · 18 mi away
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Jeffers · 20 mi away
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Butterfield: 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 April 24, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Lift station · Sludge dewatering · all terms