Clean Water Act discharge permit · NPDES IA0035271
DEWITT CITY OF STP, De Witt, IA: NPDES IA0035271 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 0Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
DEWITT CITY OF STP, held by CITY OF DEWITT, holds NPDES permit IA0035271. EPA’s file records it issued December 1, 2016 and expiring November 30, 2021. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | DEWITT CITY OF STP |
|---|---|
| Permittee as filed | CITY OF DEWITT |
| NPDES ID | IA0035271 |
| 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, 2016 |
| Expiration date | November 30, 2021 |
| Issuing agency | STA |
| Address | De Witt, IA 52742 |
| Subwatershed | Silver Creek (HUC 070801030602) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 10Pollutants on file
- 0Under a numeric limit
- 10With a violation of any kind
- 8With 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] | 0 | 8 | 8 | June 30, 2017 | 368% over the limit |
| Solids, total suspended | 0 | 7 | 6 | August 31, 2006 | 3,704% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 0 | 4 | 3 | July 31, 2007 | 108% over the limit |
| Copper, total [as Cu] | 0 | 2 | 2 | January 31, 2026 | 121% over the limit |
| Oxygen, dissolved [DO] | 0 | 1 | 1 | May 31, 2018 | 87% over the limit |
| Cadmium, total [as Cd] | 0 | 1 | 1 | April 30, 2026 | 83% over the limit |
| Zinc, total [as Zn] | 0 | 1 | 1 | January 31, 2025 | 41% over the limit |
| Flow, in conduit or thru treatment plant | 0 | 1 | 1 | June 30, 2002 | 23% over the limit |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 0 | 2 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 0 | 1 | 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 IA0035271.
Velarion’s copy of EPA’s ICIS-NPDES files does not yet 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.
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, IA0035271.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 IA0035271 there.
Nearby on the register
- Discharge permits in De Witt
- Every permit record in De Witt, A to Z
- Discharge permits in Iowa
- Every permit record in Iowa, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.