Winfield WWTP
S Oak St & 130th St, Winfield, IA 52659 · Henry County · Publicly Owned Treatment Works
- Average flow
- 0.24 MGD
- Design flow
- 1.25 MGD
- NPDES permit
- IA0033367
- Effective
- Permit expires
- August 2028
- Population served
- 1,182
- CWNS 2022
Winfield WWTP is a publicly owned wastewater treatment works in Winfield, Henry County, Iowa treating an average of 0.24 million gallons per day against a permitted design capacity of 1.25 MGD, serving about 1,182 residents. It discharges under NPDES permit IA0033367 (effective), which expires in August 2028, with 65 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Winfield WWTP.
Available with a free Klarifi account
See the full treatment train at Winfield WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 65
- Effluent violations
- 65
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Winfield WWTP.
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Nearby wastewater treatment plants in Iowa
Mount Union · 5 mi away
0.0038 MGD
Olds · 6 mi away
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Crawfordsville · 8 mi away
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Morning Sun · 9 mi away
0.12 MGD
Columbus Junction · 12 mi away
0.24 MGD
Wayland · 12 mi away
0.1 MGD
Ainsworth · 13 mi away
—
Wapello · 14 mi away
0.25 MGD
Winfield 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 October 26, 2026; facility record last updated March 19, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms