Festina-Winneshiek County-STP
201 West Main Street, Decorah, IA 52101 · Winneshiek County · Publicly Owned Treatment Works
- Average flow
- 0.0067 MGD
- Design flow
- 0.02 MGD
- NPDES permit
- IA0075442
- Effective
- Permit expires
- January 2027
- Population served
- 1,261
- CWNS 2022
Festina-Winneshiek County-STP is a publicly owned wastewater treatment works in Decorah, Winneshiek County, Iowa treating an average of 0.0067 million gallons per day against a permitted design capacity of 0.02 MGD, serving about 1,261 residents. It discharges under NPDES permit IA0075442 (effective), which expires in January 2027, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Festina-Winneshiek County-STP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Festina-Winneshiek County-STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Festina-Winneshiek County-STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Decorah · 2 mi away
0.92 MGD
Calmar · 9 mi away
0.14 MGD
Ridgeway · 10 mi away
0.02 MGD
Spillville · 11 mi away
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Ossian · 11 mi away
0.18 MGD
Fort Atkinson · 13 mi away
—
Castalia · 14 mi away
—
Protivin · 16 mi away
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Festina-Winneshiek County-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 February 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms