Desoto City Of STP
De Soto, IA · Dallas County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.1 MGD
- NPDES permit
- IA0056821
- Effective
- Permit expires
- December 2030
- Population served
- 915
- CWNS 2022
Desoto City Of STP is a publicly owned wastewater treatment works in De Soto, Dallas County, Iowa, serving about 915 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit IA0056821 (effective), which expires in December 2030, with 9 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 9
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Desoto City Of STP.
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Nearby wastewater treatment plants in Iowa
Van Meter · 3 mi away
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Adel · 5 mi away
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Earlham · 6 mi away
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Dallas Center · 10 mi away
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Redfield · 11 mi away
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Dexter · 12 mi away
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Patterson · 14 mi away
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Winterset · 15 mi away
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Desoto City Of STP: 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 28, 2025.