Clean Water Act discharge permit · NPDES IA0028932
ALTON CITY OF STP, Alton, IA: NPDES IA0028932 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
ALTON CITY OF STP, held by CITY OF ALTON, holds NPDES permit IA0028932. EPA’s file records it issued May 1, 2024 and expiring April 30, 2029. 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 | ALTON CITY OF STP |
|---|---|
| Permittee as filed | CITY OF ALTON |
| NPDES ID | IA0028932 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | May 1, 2024 |
| Expiration date | April 30, 2029 |
| Issuing agency | STA |
| Address | Alton, IA 51003 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Wolf Creek-Floyd River (HUC 102300020307) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 6Pollutants on file
- 0Under a numeric limit
- 6With a violation of any kind
- 3With 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 |
|---|---|---|---|---|---|
| Flow, in conduit or thru treatment plant | 0 | 12 | 12 | January 31, 2013 | 266% over the limit |
| Chloride [as Cl] | 0 | 33 | 5 | October 31, 2025 | 29% over the limit |
| pH | 0 | 6 | 2 | October 31, 2018 | |
| Nitrogen, ammonia total [as N] | 0 | 32 | 0 | ||
| Solids, total suspended | 0 | 2 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 0 | 2 | 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 IA0028932.
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.
Watch this permit
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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 IA0028932 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.