Chatfield WWTP
90 Library Lane SW, Chatfield, MN 55923 · Fillmore County · Publicly Owned Treatment Works
- Average flow
- 0.19 MGD
- Design flow
- 0.49 MGD
- NPDES permit
- MN0021857
- Effective
- Permit expires
- January 2030
- Population served
- 2,997
- CWNS 2022
Chatfield WWTP is a publicly owned wastewater treatment works in Chatfield, Fillmore County, Minnesota treating an average of 0.19 million gallons per day against a permitted design capacity of 0.49 MGD, serving about 2,997 residents. It discharges under NPDES permit MN0021857 (effective), which expires in January 2030, with 0 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Chatfield WWTP.
Available with a free Klarifi account
See the full treatment train at Chatfield WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Chatfield WWTP.
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Nearby wastewater treatment plants in Minnesota
Saint Charles · 12 mi away
2.35 MGD
Preston · 13 mi away
0.37 MGD
Spring Valley · 14 mi away
0.41 MGD
Stewartville · 15 mi away
0.54 MGD
Racine · 15 mi away
0.11 MGD
Utica · 15 mi away
—
Lewiston · 18 mi away
0.08 MGD
Peterson · 18 mi away
0.02 MGD
Chatfield 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 October 26, 2026; facility record last updated April 4, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Anaerobic digester · Lift station · all terms