St Leo WWTP
St. Leo, MN · Yellow Medicine County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.02 MGD
- NPDES permit
- MN0024775
- Expired
- Permit expires
- May 2026
- Population served
- 167
- CWNS 2022
St Leo WWTP is a publicly owned wastewater treatment works in St. Leo, Yellow Medicine County, Minnesota, serving about 167 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit MN0024775 (expired), which expires in May 2026, with 1 recorded violation 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
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for St Leo WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at St Leo WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Minnesota
Porter · 8 mi away
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Taunton · 9 mi away
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Canby · 9 mi away
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Minneota · 11 mi away
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Clarkfield · 12 mi away
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Dawson · 14 mi away
0.23 MGD
Ghent · 16 mi away
—
Ivanhoe · 20 mi away
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St Leo 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 November 5, 2025.