Columbus Junction City Of STP
East Of Highway 70 Byass, North Of Rr Tracks, Columbus Junction, IA 52738 · Louisa County · Publicly Owned Treatment Works
- Average flow
- 0.24 MGD
- Design flow
- 1.64 MGD
- NPDES permit
- IA0023523
- Effective
- Permit expires
- October 2029
- Population served
- 2,343
- CWNS 2022
Columbus Junction City Of STP is a publicly owned wastewater treatment works in Columbus Junction, Louisa County, Iowa treating an average of 0.24 million gallons per day against a permitted design capacity of 1.64 MGD, serving about 2,343 residents. It discharges under NPDES permit IA0023523 (effective), which expires in October 2029, with 16 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Columbus Junction City Of STP.
Available with a free Klarifi account
See the full treatment train at Columbus Junction City Of STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 15
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Columbus Junction 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 Columbus Junction City Of STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Iowa
Letts · 6 mi away
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Conesville · 7 mi away
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Grandview · 9 mi away
0.06 MGD
Ainsworth · 10 mi away
—
Crawfordsville · 11 mi away
—
Winfield · 12 mi away
0.24 MGD
Wapello · 12 mi away
0.25 MGD
Morning Sun · 13 mi away
0.12 MGD
Columbus Junction 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 March 16, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms