Stewartville WWTP
Stewartville, MN · Olmsted County · Publicly Owned Treatment Works
- Average flow
- 0.6 MGD
- Design flow
- 1.11 MGD
- NPDES permit
- MN0020681
- Effective
- Permit expires
- November 2029
- Population served
- 6,466
- CWNS 2022
Stewartville WWTP is a publicly owned wastewater treatment works in Stewartville, Olmsted County, Minnesota treating an average of 0.6 million gallons per day against a permitted design capacity of 1.11 MGD, serving about 6,466 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches, biogas balloons. It discharges under NPDES permit MN0020681 (effective), which expires in November 2029, with 4 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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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
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Stewartville WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Stewartville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Minnesota
Racine · 7 mi away
—
Grand Meadow · 12 mi away
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Rochester · 13 mi away
11.33 MGD
Spring Valley · 13 mi away
0.48 MGD
Byron · 14 mi away
0.5 MGD
Chatfield · 15 mi away
0.18 MGD
Dexter · 15 mi away
—
Sargeant Township · 17 mi away
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Stewartville 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.