Clean Water Act discharge permit · NPDES IA0043095
SIOUX CITY, CITY OF STP, Sioux City, IA: NPDES IA0043095 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 13Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
SIOUX CITY, CITY OF STP, held by CITY OF SIOUX CITY, holds NPDES permit IA0043095. EPA’s file records it issued December 1, 2020 and expiring November 30, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | SIOUX CITY, CITY OF STP |
|---|---|
| Permittee as filed | CITY OF SIOUX CITY |
| NPDES ID | IA0043095 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | December 1, 2020 |
| Expiration date | November 30, 2025 |
| Issuing agency | STA |
| Address | Sioux City, IA 51106 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Bacon Creek-Missouri River (HUC 102300010305) |
| Program components on file | Biosolids, POTW, Pretreatment |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
| Other EPA IDs (FRS) | RCRA handler IAD000766295; ICIS-AIR source IA0000001919300689 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 14Pollutants on file
- 13Under a numeric limit
- 9With a violation of any kind
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 9 | 42 | 42 | June 30, 2024 | 5,051% over the limit |
| Chlorine, total residual | 8 | 26 | 18 | June 30, 2024 | 675% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 17 | 17 | June 30, 2024 | 739% over the limit |
| Oil & Grease | 2 | 9 | 6 | March 31, 2019 | 280% over the limit |
| Nitrogen, ammonia total [as N] | 96 | 4 | 4 | December 31, 2019 | 9% over the limit |
| Oxygen, dissolved [DO] | 0 | 2 | 2 | January 31, 2020 | 22% over the limit |
| pH | 5 | 4 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 1 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 1 | 0 | ||
| Nitrogen, total [as N] | 10 | 0 | 0 | ||
| Phosphorus, total [as P] | 10 | 0 | 0 | ||
| BOD, 5-day, 20 deg. C | 5 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 5 | 0 | 0 | ||
| E. coli | 1 | 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 IA0043095.
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 IA0043095 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.