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Blast Furnaces And Steel Mills, major discharger, River Rouge, Michigan. NPDES permit MI0026786 expired Oct 1, 2023; its limits still apply. Last 12 months: no values over a limit, 1 of 99 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 001 |
| Mercury, total [as Hg] | 12-month average | ≤ 2 ng/L | all year | 001 |
| Mercury, total [as Hg] | 12-month average | ≤ .0004 lb/d | all year | 001 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 001 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 002 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 002 |
| Mercury, total [as Hg] | 12-month average | ≤ 2 ng/L | all year | 002 |
| Mercury, total [as Hg] | 12-month average | ≤ .0002 lb/d | all year | 002 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 003 |
| pH | daily maximum | ≤ 9 SU | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 38 ug/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 2.2 lb/d | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 003 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 003 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 003 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 003 |
| Mercury, total [as Hg] | 12-month average | ≤ 44 ng/L | all year | 003 |
| Mercury, total [as Hg] | 12-month average | ≤ .0026 lb/d | all year | 003 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 003 |
| pH | daily minimum | ≥ 6.5 SU | all year | 005 |
| pH | daily maximum | ≤ 9 SU | all year | 005 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 005 |
| Zinc, total [as Zn] | daily maximum | report only (lb/d) | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 005 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 005 |
| pH | daily minimum | ≥ 6.5 SU | all year | 007 |
| pH | daily maximum | ≤ 9 SU | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 007 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 007 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 007 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 007 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 007 |
| Mercury, total [as Hg] | 12-month average | ≤ 3 ng/L | all year | 007 |
| Mercury, total [as Hg] | 12-month average | ≤ .00003 lb/d | all year | 007 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 007 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 008 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 008 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 008 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 008 |
| pH | daily minimum | ≥ 6.5 SU | all year | 008 |
| pH | daily minimum | ≥ 6 SU | all year | 008 |
| pH | daily minimum | ≥ 6 SU | all year | 008 |
| pH | daily minimum | ≥ 6 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| pH | daily maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 008 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 008 |
| Solids, total suspended | monthly average | ≤ 250 lb/d | all year | 008 |
| Solids, total suspended | monthly average | ≤ 390 lb/d | all year | 008 |
| Solids, total suspended | monthly average | ≤ 390 lb/d | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 830 lb/d | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 1200 lb/d | all year | 008 |
| Solids, total suspended | daily maximum | ≤ 1200 lb/d | all year | 008 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 008 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 008 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 008 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 008 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 008 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | report only (lb/d) | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 650 lb/d | all year | 008 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 44 lb/d | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (lb/d) | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1850 lb/d | all year | 008 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 130 lb/d | all year | 008 |
| Cyanide, total [as CN] | monthly average | ≤ 13 lb/d | all year | 008 |
| Cyanide, total [as CN] | monthly average | ≤ 13 lb/d | all year | 008 |
| Cyanide, total [as CN] | daily maximum | ≤ 26 lb/d | all year | 008 |
| Cyanide, total [as CN] | daily maximum | ≤ 26 lb/d | all year | 008 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 008 |
| Lead, total [as Pb] | monthly average | ≤ 1.3 lb/d | all year | 008 |
| Lead, total [as Pb] | monthly average | ≤ 1.3 lb/d | all year | 008 |
| Lead, total [as Pb] | daily maximum | ≤ 3.9 lb/d | all year | 008 |
| Lead, total [as Pb] | daily maximum | ≤ 3.9 lb/d | all year | 008 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 008 |
| Zinc, total [as Zn] | monthly average | ≤ 2 lb/d | all year | 008 |
| Zinc, total [as Zn] | monthly average | ≤ 2 lb/d | all year | 008 |
| Zinc, total [as Zn] | daily maximum | ≤ 5.9 lb/d | all year | 008 |
| Zinc, total [as Zn] | daily maximum | ≤ 5.9 lb/d | all year | 008 |
| Cyanide [A] | daily maximum | report only (ug/L) | all year | 008 |
| Phenols | daily maximum | report only (mg/L) | all year | 008 |
| Phenols | monthly average | report only (lb/d) | all year | 008 |
| Phenols | monthly average | ≤ .44 lb/d | all year | 008 |
| Phenols | monthly average | ≤ 6.3 lb/d | all year | 008 |
| Phenols | daily maximum | report only (lb/d) | all year | 008 |
| Phenols | daily maximum | ≤ 1.8 lb/d | all year | 008 |
| Phenols | daily maximum | ≤ 12.6 lb/d | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 008 |
| Chlorine, total residual | daily maximum | ≤ 38 ug/L | all year | 008 |
| Chlorine, total residual | daily maximum | ≤ 2.2 lb/d | all year | 008 |
| Chlorine, total residual | daily maximum | ≤ 2.2 lb/d | all year | 008 |
| Mercury, total [as Hg] | monthly average | report only (ng/L) | all year | 008 |
| Mercury, total [as Hg] | daily maximum | report only (ng/L) | all year | 008 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 008 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 008 |
| Mercury, total [as Hg] | monthly average | report only (lb/d) | all year | 008 |
| Mercury, total [as Hg] | daily maximum | report only (lb/d) | all year | 008 |
| Mercury, total [as Hg] | 12-month average | ≤ 3 ng/L | all year | 008 |
| Mercury, total [as Hg] | 12-month average | ≤ .0025 lb/d | all year | 008 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 008 |
Cited limits by parameter: Michigan's rules and the federal ones.
Same industry: the 9 Primary Metal Industries permits in Michigan.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MI0026786 · MCP: https://passage-data.com/mcp