Clean Water Act discharge permit · NPDES IA0035220
DECORAH CITY OF STP, Decorah, IA: NPDES IA0035220 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 10Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
DECORAH CITY OF STP, held by CITY OF DECORAH, holds NPDES permit IA0035220. EPA’s file records it issued September 1, 2017 and expiring August 31, 2022. 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 | DECORAH CITY OF STP |
|---|---|
| Permittee as filed | CITY OF DECORAH |
| NPDES ID | IA0035220 |
| 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 | September 1, 2017 |
| Expiration date | August 31, 2022 |
| Issuing agency | STA |
| Address | Decorah, IA 52101 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Community of Freeport-Upper Iowa River (HUC 070600020408) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 10Under a numeric limit
- 10With a violation of any kind
- 4With 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 |
|---|---|---|---|---|---|
| Toxicity [acute], Ceriodaphnia dubia | 1 | 3 | 2 | May 31, 2015 | 100% over the limit |
| Copper, total [as Cu] | 0 | 2 | 2 | January 31, 2006 | 70% over the limit |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 3 | 1 | May 31, 2015 | 100% over the limit |
| E. coli | 0 | 1 | 1 | October 31, 2008 | 55% over the limit |
| Cyanide, total [as CN] | 0 | 52 | 0 | ||
| Chromium, total [as Cr] | 0 | 52 | 0 | ||
| Coliform, fecal general | 0 | 10 | 0 | ||
| Solids, total suspended | 9 | 8 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 8 | 0 | ||
| pH | 5 | 4 | 0 | ||
| Nitrogen, ammonia total [as N] | 48 | 0 | 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 IA0035220.
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 IA0035220 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.