Mallard City Of STP
490th Street, East Of Town, Mallard, IA 50562 · Palo Alto County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.08 MGD
- NPDES permit
- IA0023370
- Administratively continued
- 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. It discharges under NPDES permit IA0023370 (administratively continued), which expires in December 2020, with 15 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Mallard City Of STP.
Available with a free Klarifi account
See the full treatment train at Mallard City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
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
2.38 MGD
Laurens · 11 mi away
0.18 MGD
West Bend · 11 mi away
0.1 MGD
Rolfe · 12 mi away
—
Cylinder · 12 mi away
—
Pocahontas · 14 mi away
0.28 MGD
Marathon · 16 mi away
0.01 MGD
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 October 26, 2026; facility record last updated August 18, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms