Clean Water Act discharge permit · NPDES IA0023523
COLUMBUS JUNCTION CITY OF STP, Columbus Junction, IA: NPDES IA0023523 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 5Pollutants with an effluent exceedance
COLUMBUS JUNCTION CITY OF STP, held by CITY OF COLUMBUS JUNCTION, holds NPDES permit IA0023523. EPA’s file records it issued May 1, 2018 and expiring April 30, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | COLUMBUS JUNCTION CITY OF STP |
|---|---|
| Permittee as filed | CITY OF COLUMBUS JUNCTION |
| NPDES ID | IA0023523 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 1, 2018 |
| Expiration date | April 30, 2023 |
| Issuing agency | STA |
| Address | Columbus Junction, IA 52738 |
| Subwatershed | Short Creek (HUC 070802090805) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 8Pollutants on file
- 7Under a numeric limit
- 6With a violation of any kind
- 5With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Nitrogen, ammonia total [as N] | 48 | 117 | 117 | September 30, 2024 | 33,514% over the limit |
| pH | 5 | 13 | 11 | September 30, 2024 | |
| Solids, total suspended | 9 | 11 | 11 | February 29, 2016 | 225% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 9 | 9 | April 30, 2025 | 200% over the limit |
| Solids, total dissolved | 0 | 7 | 7 | May 31, 2012 | 69% over the limit |
| E. coli | 3 | 1 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Oxygen, dissolved [DO] | 3 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES IA0023523.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID IA0023523 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.