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Blast Furnaces And Steel Mills, major discharger, Ecorse, Michigan. NPDES permit MI0002313 expired Oct 1, 2002; its limits still apply. Last 12 months: no values over a limit, 65 required values missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year | 011 |
| pH | daily maximum | ≤ 9 SU | all year | 011 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 011 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 011 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 011 |
| Oil & Grease | daily maximum | report only (mg/L) | all year | 011 |
| Phosphorus, total [as P] | monthly average | ≤ 1 mg/L | all year | 011 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 011 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 011 |
| Copper, total [as Cu] | daily maximum | ≤ 38 ug/L | all year | 011 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 011 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 011 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 011 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 011 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 011 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 011 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 011 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 011 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 012 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 012 |
| Temperature, water deg. fahrenheit | monthly average | report only (deg F) | all year | 013 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 013 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 013 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 013 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 013 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 013 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 013 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 013 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 013 |
| pH | daily minimum | ≥ 6 SU | all year | 014 |
| pH | daily maximum | ≤ 9 SU | all year | 014 |
| Solids, total suspended | monthly average | ≤ 410 lb/d | all year | 014 |
| Solids, total suspended | daily maximum | ≤ 1200 lb/d | all year | 014 |
| Oil & Grease | monthly average | ≤ 120 lb/d | all year | 014 |
| Oil & Grease | daily maximum | ≤ 370 lb/d | all year | 014 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 014 |
| Lead, total [as Pb] | monthly average | ≤ 1.3 lb/d | all year | 014 |
| Lead, total [as Pb] | daily maximum | ≤ 3.9 lb/d | all year | 014 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | Jan, Apr, Jul, Oct | 014 |
| Zinc, total [as Zn] | monthly average | ≤ 2 lb/d | all year | 014 |
| Zinc, total [as Zn] | daily maximum | ≤ 5.9 lb/d | all year | 014 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 014 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 014 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 014 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 014 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 014 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 014 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 014 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 015 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 015 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 015 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 015 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 015 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 015 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 015 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | Jan, Apr, Jul, Oct | 016 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 016 |
| Zinc, total [as Zn] | daily maximum | ≤ 470 ug/L | all year | 016 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 016 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 016 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 016 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 016 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 016 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 016 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 016 |
| Thallium, total [as Tl] | monthly average | report only (ug/L) | all year | 017 |
| Thallium, total [as Tl] | monthly average | report only (ug/L) | all year | 017 |
| Thallium, total [as Tl] | daily maximum | report only (ug/L) | all year | 017 |
| Thallium, total [as Tl] | daily maximum | ≤ 160 ug/L | all year | 017 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | ≤ 20 ug/L | all year | 017 |
| Benzene, ethylbenzene, toluene, xylene combination | monthly average | report only (mg/L) | all year | 017 |
| Benzene, ethylbenzene, toluene, xylene combination | daily maximum | report only (mg/L) | all year | 017 |
| Benzene | daily maximum | ≤ 5 ug/L | all year | 017 |
| Benzene | monthly average | report only (mg/L) | all year | 017 |
| Benzene | daily maximum | report only (mg/L) | all year | 017 |
| Benzene | monthly average | report only (ug/L) | all year | 017 |
| Benzene | daily maximum | report only (ug/L) | all year | 017 |
| Naphthalene | daily maximum | ≤ 5 ug/L | all year | 017 |
| Naphthalene | monthly average | report only (mg/L) | all year | 017 |
| Naphthalene | daily maximum | report only (mg/L) | all year | 017 |
| Naphthalene | monthly average | report only (ug/L) | all year | 017 |
| Naphthalene | daily maximum | report only (ug/L) | all year | 017 |
| Equipment inspection - visual | value | report only (N=0;Y=1) | all year | 017 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 017 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 017 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 017 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 017 |
| pH | daily minimum | ≥ 6 SU | all year | 018 |
| pH | daily maximum | ≤ 10 SU | all year | 018 |
| Solids, total suspended | monthly average | ≤ 25 mg/L | all year | 018 |
| Solids, total suspended | daily maximum | ≤ 75 mg/L | all year | 018 |
| Solids, total suspended | monthly average | ≤ 890 lb/d | all year | 018 |
| Solids, total suspended | daily maximum | ≤ 1800 lb/d | all year | 018 |
| Solids, total suspended | monthly average | ≤ 25 mg/L | all year | 018 |
| Solids, total suspended | daily maximum | ≤ 75 mg/L | all year | 018 |
| Solids, total suspended | monthly average | ≤ 950 lb/d | all year | 018 |
| Solids, total suspended | daily maximum | ≤ 1940 lb/d | all year | 018 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 018 |
| Oil & Grease | monthly average | ≤ 440 lb/d | all year | 018 |
| Oil & Grease | daily maximum | ≤ 1000 lb/d | all year | 018 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 018 |
| Oil & Grease | monthly average | ≤ 460 lb/d | all year | 018 |
| Oil & Grease | daily maximum | ≤ 1060 lb/d | all year | 018 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | Jan, Apr, Jul, Oct | 018 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 018 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 018 |
| Lead, total [as Pb] | monthly average | ≤ 6.9 lb/d | all year | 018 |
| Lead, total [as Pb] | daily maximum | ≤ 15 lb/d | all year | 018 |
| Lead, total [as Pb] | monthly average | report only (ug/L) | all year | 018 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 018 |
| Lead, total [as Pb] | monthly average | ≤ 7.2 lb/d | all year | 018 |
| Lead, total [as Pb] | daily maximum | ≤ 16 lb/d | all year | 018 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 018 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 018 |
| Zinc, total [as Zn] | monthly average | ≤ 16 lb/d | all year | 018 |
| Zinc, total [as Zn] | daily maximum | ≤ 32 lb/d | all year | 018 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 018 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 018 |
| Zinc, total [as Zn] | monthly average | ≤ 16 lb/d | all year | 018 |
| Zinc, total [as Zn] | daily maximum | ≤ 33 lb/d | all year | 018 |
| Total residual ooxidant-discharge time | daily maximum | report only (min/d) | all year | 018 |
| Oxidants, total residual | daily maximum | ≤ 38 ug/L | all year | 018 |
| Oxidants, total residual | daily maximum | ≤ 200 ug/L | all year | 018 |
| Oxidants, total residual | daily maximum | ≤ 50 ug/L | all year | 018 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 018 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 018 |
| Nalco Macrotrol 9210 | daily maximum | ≤ 80 ug/L | all year | 018 |
| Toxicity, final conc toxicity units | daily maximum | ≤ 10 tox acute | all year | 018 |
| Organics, total toxic [TTO] | daily maximum | ≤ .46 mg/L | all year | 018 |
| Outfall observation,visual, y/n response | value | report only (N=0;Y=1) | all year | 018 |
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/MI0002313 · MCP: https://passage-data.com/mcp