Clean Water Act discharge permit · NPDES IA0060909
IPL - OTTUMWA GENERATING STATION, Ottumwa, IA: NPDES IA0060909 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 15Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
IPL - OTTUMWA GENERATING STATION, held by INTERSTATE POWER AND LIGHT COMPANY, holds NPDES permit IA0060909. EPA’s file records it issued June 1, 2024 and expiring May 31, 2029. 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 | IPL - OTTUMWA GENERATING STATION |
|---|---|
| Permittee as filed | INTERSTATE POWER AND LIGHT COMPANY |
| NPDES ID | IA0060909 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | June 1, 2024 |
| Expiration date | May 31, 2029 |
| Issuing agency | STA |
| Address | Ottumwa, IA 52501 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Middle Avery Creek (HUC 071000090703) |
| NAICS | 221112 – Fossil Fuel Electric Power Generation |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler IAD022287080; ICIS-AIR source IA0000001917900027 |
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
- 20Pollutants on file
- 15Under a numeric limit
- 18With 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 | 7 | 42 | 10 | October 31, 2024 | 860% over the limit |
| pH | 8 | 34 | 10 | April 30, 2026 | |
| Aluminum, total [as Al] | 0 | 9 | 9 | May 31, 2024 | 1,370% over the limit |
| Chromium, hexavalent [as Cr] | 0 | 6 | 6 | April 30, 2024 | 646% over the limit |
| Chloride [as Cl] | 0 | 2 | 2 | April 30, 2023 | 27% over the limit |
| Chlorine, free available | 2 | 11 | 1 | October 31, 2021 | 164% over the limit |
| Oil & Grease | 2 | 12 | 0 | ||
| Chromium, total [as Cr] | 2 | 10 | 0 | ||
| Zinc, total [as Zn] | 2 | 10 | 0 | ||
| Iron, total [as Fe] | 4 | 8 | 0 | ||
| BOD, carbonaceous [5 day, 20 C] | 4 | 8 | 0 | ||
| Chlorination duration | 1 | 5 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 3 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 3 | 0 | ||
| Arsenic, total [as As] | 0 | 2 | 0 | ||
| Mercury, total [as Hg] | 0 | 2 | 0 | ||
| Chlorine, total residual | 8 | 1 | 0 | ||
| E. coli | 1 | 1 | 0 | ||
| Temperature, water deg. fahrenheit | 24 | 0 | 0 | ||
| Boron, total [as B] | 8 | 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 IA0060909.
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 IA0060909 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.