Mallard City Of STP
Mallard, IA · Palo Alto County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.08 MGD
- NPDES permit
- IA0023370
- Effective
- Permit expires
- December 2020
- Population served
- 257
- CWNS 2022
Mallard City Of STP is a publicly owned wastewater treatment works in Mallard, Palo Alto County, Iowa, serving about 257 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit IA0023370 (effective), which expires in December 2020, with 15 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
- 15
- 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 Mallard City Of STP.
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Nearby wastewater treatment plants in Iowa
Ayrshire · 10 mi away
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Emmetsburg · 11 mi away
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Laurens · 11 mi away
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West Bend · 11 mi away
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Rolfe · 12 mi away
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Cylinder · 12 mi away
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Ruthven · 17 mi away
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Webb · 18 mi away
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Mallard 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 August 18, 2026.