Whitewater River Regional WWTP
Saint Charles, MN · Winona County · Publicly Owned Treatment Works
- Average flow
- 0.58 MGD
- Design flow
- 1.12 MGD
- NPDES permit
- MN0046868
- Effective
- Permit expires
- October 2027
- Population served
- 6,629
- CWNS 2022
Whitewater River Regional WWTP is a publicly owned wastewater treatment works in Saint Charles, Winona County, Minnesota treating an average of 0.58 million gallons per day against a permitted design capacity of 1.12 MGD, serving about 6,629 residents. Treatment on site includes uncovered lagoons, carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit MN0046868 (effective), which expires in October 2027, with 13 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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Carrousels / oxidation ditches
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 13
- Effluent violations
- 13
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Whitewater River Regional WWTP.
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Nearby wastewater treatment plants in Minnesota
Utica · 5 mi away
—
Lewiston · 9 mi away
0.07 MGD
Chatfield · 12 mi away
0.18 MGD
Plainview · 13 mi away
0.62 MGD
Stockton · 14 mi away
—
Rollingstone Township · 15 mi away
—
Minnesota City · 17 mi away
0.01 MGD
Peterson · 17 mi away
0.02 MGD
Whitewater River Regional 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 April 4, 2025.