Clean Water Act discharge permit · NPDES IA0034291
WINTERSET CITY OF STP, Winterset, IA: NPDES IA0034291 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
WINTERSET CITY OF STP, held by CITY OF WINTERSET, holds NPDES permit IA0034291. EPA’s file records it issued January 1, 2020 and expiring December 31, 2024. 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 | WINTERSET CITY OF STP |
|---|---|
| Permittee as filed | CITY OF WINTERSET |
| NPDES ID | IA0034291 |
| 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 | January 1, 2020 |
| Expiration date | December 31, 2024 |
| Issuing agency | STA |
| Address | Winterset, IA 50273 |
| Subwatershed | Pammel State Park-Middle River (HUC 071000080609) |
| Program components on file | Biosolids, POTW |
| NAICS | 221320 – Sewage Treatment Facilities |
| SIC | 4952 – Sewerage Systems |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 14Pollutants on file
- 14Under a numeric limit
- 10With a violation of any kind
- 7With 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 | 57 | 25 | April 30, 2026 | 143% over the limit |
| Copper, total [as Cu] | 4 | 49 | 25 | April 30, 2026 | 182% over the limit |
| Nitrogen, ammonia total [as N] | 48 | 24 | 8 | May 31, 2026 | 148% over the limit |
| Oxygen, dissolved [DO] | 1 | 12 | 4 | May 31, 2026 | 42% over the limit |
| E. coli | 1 | 7 | 4 | July 31, 2026 | 371% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 4 | 34 | 2 | February 28, 2026 | 80% over the limit |
| pH | 5 | 14 | 2 | May 31, 2024 | |
| Oil & Grease | 2 | 10 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 4 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 4 | 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 |
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 IA0034291.
Inspections
EPA’s inspection file holds no inspection for NPDES IA0034291.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES IA0034291.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, IA0034291.
Start the watch
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- One watershed — $2,990/year
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How we handle your data → Privacy
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 IA0034291 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.