Saint Peter WWTP
Saint Peter, MN · Nicollet County · Publicly Owned Treatment Works
- Average flow
- 1.9 MGD
- Design flow
- 4 MGD
- NPDES permit
- MN0022535
- Effective
- Permit expires
- March 2027
- Population served
- 12,780
- CWNS 2022
Saint Peter WWTP is a publicly owned wastewater treatment works in Saint Peter, Nicollet County, Minnesota treating an average of 1.9 million gallons per day against a permitted design capacity of 4 MGD, serving about 12,780 residents. Treatment on site includes uncovered lagoons. It discharges under NPDES permit MN0022535 (effective), which expires in March 2027, with 15 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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Compliance snapshot (last 3 years)
- Total violations
- 15
- 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 Saint Peter WWTP.
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Nearby wastewater treatment plants in Minnesota
Cleveland · 5 mi away
—
Le Center · 11 mi away
0.38 MGD
Nicollet · 13 mi away
—
Elysian · 17 mi away
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Saint Clair · 18 mi away
0.06 MGD
Gaylord · 19 mi away
—
Arlington · 19 mi away
—
Kilkenny · 19 mi away
—
Saint Peter 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 March 20, 2025.