Clean Water Act discharge permit · NPDES MN0057207
US STEEL CORP - MN ORE OPERATIONS - MINNTAC TAILINGS BASIN, Mountain Iron, MN: NPDES MN0057207 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 15Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
US STEEL CORP - MN ORE OPERATIONS - MINNTAC TAILINGS BASIN, held by US Steel Corp, holds NPDES permit MN0057207. EPA’s file records it issued December 1, 2018 and expiring November 30, 2023. 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 | US STEEL CORP - MN ORE OPERATIONS - MINNTAC TAILINGS BASIN |
|---|---|
| Permittee as filed | US Steel Corp |
| NPDES ID | MN0057207 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 1, 2018 |
| Expiration date | November 30, 2023 |
| Issuing agency | STA |
| Address | Mountain Iron, MN 55768 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Sand River (HUC 090300020102) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 15Pollutants on file
- 15Under a numeric limit
- 1With a violation of any kind
- 0With 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 |
|---|---|---|---|---|---|
| Stream flow, instantaneous | 2 | 1 | 0 | ||
| pH | 16 | 0 | 0 | ||
| Specific conductance | 8 | 0 | 0 | ||
| Bicarbonate ion- [as HCO3] | 8 | 0 | 0 | ||
| Chloride [as Cl] | 8 | 0 | 0 | ||
| Sulfate, total [as SO4] | 8 | 0 | 0 | ||
| Hardness, Ca Mg Calculated [mg/L as CaCO3] | 8 | 0 | 0 | ||
| Solids, total dissolved | 8 | 0 | 0 | ||
| Solids, total suspended | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 0 | 0 | ||
| Iron, dissolved [as Fe] | 2 | 0 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Manganese, dissolved [as Mn] | 1 | 0 | 0 | ||
| Mercury, dissolved [as Hg] | 1 | 0 | 0 | ||
| Mercury, total [as Hg] | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MN0057207.
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
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| February 14, 2023 | Effluent Violations - Unapproved Bypass | ST6 |
| February 14, 2023 | Reporting Violations - Failure to Notify | ST6 |
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 MN0057207 there.
Nearby on the register
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- Every permit record in Minnesota, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.