Clean Water Act discharge permit · NPDES OH0006840
AK STEEL CORP - MANSFIELD WORKS, Mansfield, OH: NPDES OH0006840 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 17Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
AK STEEL CORP - MANSFIELD WORKS, held by AK Steel Corporation, holds NPDES permit OH0006840, which discharges to Rocky Fork. EPA’s file records it issued October 25, 2023 and expiring October 31, 2028. 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 | AK STEEL CORP - MANSFIELD WORKS |
|---|---|
| Permittee as filed | AK Steel Corporation |
| NPDES ID | OH0006840 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 25, 2023 |
| Expiration date | October 31, 2028 |
| Address | Mansfield, OH 44903 |
| Receiving water | Rocky Fork |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Headwaters Rocky Fork (HUC 050400020203) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 17Pollutants on file
- 17Under a numeric limit
- 6With 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 |
|---|---|---|---|---|---|
| Solids, total suspended | 4 | 6 | 4 | November 30, 2005 | 190% over the limit |
| Copper, total recoverable | 2 | 3 | 3 | May 31, 2004 | 94% over the limit |
| pH | 4 | 2 | 2 | January 31, 2014 | |
| Oil and grease [soxhlet extr.] tot. | 4 | 2 | 2 | May 31, 2004 | 18% over the limit |
| Toxicity [acute], Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 2 | 4 | 0 | ||
| Temperature, water deg. centigrade | 4 | 0 | 0 | ||
| Fluoride, total [as F] | 4 | 0 | 0 | ||
| Zinc, total recoverable | 4 | 0 | 0 | ||
| Lead, total recoverable | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Mercury, total low level | 4 | 0 | 0 | ||
| Phosphorus, total [as P] | 2 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Boron, total recoverable | 2 | 0 | 0 | ||
| Chromium, total recoverable | 2 | 0 | 0 | ||
| Chlorine, total residual | 1 | 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 OH0006840.
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 OH0006840 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.