Corydon City Of STP
Corydon, IA 50060 · Wayne County · Publicly Owned Treatment Works
- Average flow
- 0.47 MGD
- Design flow
- 1.82 MGD
- NPDES permit
- IA0049573
- Administratively continued
- Permit expires
- June 2026
- Population served
- 1,657
- CWNS 2022
Corydon City Of STP is a publicly owned wastewater treatment works in Corydon, Wayne County, Iowa treating an average of 0.47 million gallons per day against a permitted design capacity of 1.82 MGD, serving about 1,657 residents. It discharges under NPDES permit IA0049573 (administratively continued), which expires in June 2026, with 46 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Corydon City Of STP.
Available with a free Klarifi account
See the full treatment train at Corydon City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 46
- Effluent violations
- 46
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Industrial users and pretreatment
Industries that discharge process wastewater to Corydon City Of STP, from the plant's pretreatment programme records.
- Industrial users
- 1
- on record
On record: East Penn Manufacturing Co Inc (Corydon). Most users are in automotive, metal and equipment manufacturing.
Unlock the details behind these industrial users
Discharge flow, federal category, source documents and contacts for every industrial user of Corydon City Of STP. Free with a Klarifi account.
Key contacts
1 verified contact for Corydon City Of STP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Corydon City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Allerton · 3 mi away
—
Allerton · 4 mi away
0.03 MGD
Promise City · 9 mi away
—
Seymour · 12 mi away
0.04 MGD
Humeston · 13 mi away
0.13 MGD
Plano · 14 mi away
—
Derby · 15 mi away
—
Lineville · 15 mi away
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Corydon 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 · Biosolids · Filter press · all terms