Clean Water Act discharge permit · NPDES INP000231
STEEL DYNAMICS INC - STRUCTURAL & RAIL DIV, Columbia City, IN: NPDES INP000231 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 7Pollutants under a numeric limit
- 7Pollutants with an effluent exceedance
STEEL DYNAMICS INC - STRUCTURAL & RAIL DIV, held by STEEL DYNAMICS, INC. - STRUCTURAL & RAIL DIV., holds NPDES permit INP000231, which discharges to Columbia City Stp (Eel River Basin). EPA’s file records it issued February 28, 2018 and expiring March 31, 2023. 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 | STEEL DYNAMICS INC - STRUCTURAL & RAIL DIV |
|---|---|
| Permittee as filed | STEEL DYNAMICS, INC. - STRUCTURAL & RAIL DIV. |
| NPDES ID | INP000231 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual industrial user permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 28, 2018 |
| Expiration date | March 31, 2023 |
| Issuing agency | IDEM |
| Address | Columbia City, IN 46725 |
| Receiving water | COLUMBIA CITY STP (EEL RIVER BASIN) |
| Other EPA IDs (FRS) | RCRA handler INR000019364; ICIS-AIR source IN0000001818300030 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 9Pollutants on file
- 7Under a numeric limit
- 9With 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 |
|---|---|---|---|---|---|
| Zinc, total recoverable | 6 | 101 | 93 | April 30, 2025 | 69,900% over the limit |
| Lead, total recoverable | 6 | 60 | 53 | October 31, 2006 | 40,965% over the limit |
| Flow, in conduit or thru treatment plant | 6 | 48 | 43 | March 31, 2023 | 52% over the limit |
| Mercury, total recoverable | 1 | 23 | 21 | December 31, 2010 | 6,500% over the limit |
| Copper, total recoverable | 2 | 16 | 11 | October 31, 2006 | 4,782% over the limit |
| pH | 2 | 9 | 3 | August 31, 2012 | |
| Oil and grease, hexane extr method | 1 | 3 | 1 | October 31, 2020 | 14% over the limit |
| Nickel, total recoverable | 0 | 2 | 0 | ||
| Chromium, total recoverable | 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 INP000231.
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
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, INP000231.
Start the watch
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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 INP000231 there.
Nearby on the register
- Discharge permits in Columbia City
- Every permit record in Columbia City, A to Z
- Discharge permits in Indiana
- Every permit record in Indiana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.