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Blast Furnaces And Steel Mills, major discharger, East Chicago, Indiana. NPDES permit IN0063711, in force until Jan 31, 2029. Last 12 months: no values over a limit. 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 SU | all year | 001 |
| pH | daily minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | monthly average | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Solids, total suspended | daily maximum | report only (lb/d) | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil and grease, hexane extr method | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | ≤ 15 mg/L | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (lb/d) | all year | 001 |
| Oil and grease, hexane extr method | monthly average | report only (lb/d) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (lb/d) | all year | 001 |
| Oil and grease, hexane extr method | daily maximum | report only (lb/d) | all year | 001 |
| Cyanide, free [as free] | monthly average | ≤ 22 ug/L | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (ug/L) | all year | 001 |
| Cyanide, free [as free] | daily maximum | ≤ 44 ug/L | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (ug/L) | all year | 001 |
| Cyanide, free [as free] | monthly average | ≤ 1.6 lb/d | all year | 001 |
| Cyanide, free [as free] | monthly average | report only (lb/d) | all year | 001 |
| Cyanide, free [as free] | daily maximum | ≤ 3.1 lb/d | all year | 001 |
| Cyanide, free [as free] | daily maximum | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ .19 mg/L | all year | 001 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ .37 mg/L | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total recoverable | monthly average | ≤ 13 lb/d | all year | 001 |
| Zinc, total recoverable | monthly average | report only (lb/d) | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 26 lb/d | all year | 001 |
| Zinc, total recoverable | daily maximum | report only (lb/d) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 23 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 46 ug/L | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 1.6 lb/d | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 3.3 lb/d | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 16 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 31 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | ≤ 1.1 lb/d | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 2.2 lb/d | 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 | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 16 ug/L | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 16 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | < 60 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | < 60 ug/L | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 1.1 lb/d | all year | 001 |
| Chlorine, total residual | monthly average | ≤ 1.1 lb/d | all year | 001 |
| Chlorine, total residual | daily maximum | < 4.3 lb/d | all year | 001 |
| Chlorine, total residual | daily maximum | < 4.3 lb/d | all year | 001 |
| Toxicity [acute], Ceriodaphnia dubia | maximum | ≤ 1 tox acute | Feb, May, Aug, Nov | 001 |
| Toxicity [chronic], Ceriodaphnia dubia | maximum | ≤ 7.9 tox chronic | Feb, May, Aug, Nov | 001 |
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | maximum | ≤ 1 tox acute | Feb, May, Aug, Nov | 001 |
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | maximum | ≤ 7.9 tox chronic | Feb, May, Aug, Nov | 001 |
| Mercury, total recoverable | rolling average | < 8.7 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | rolling average | ≤ 8.7 ng/L | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Mercury, total recoverable | daily maximum | report only (ng/L) | Feb, Apr, Jun, Aug, Oct, Dec | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 101 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | ≤ 893 lb/d | all year | 101 |
| Solids, total suspended | monthly average | ≤ 278 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 1902 lb/d | all year | 101 |
| Solids, total suspended | daily maximum | ≤ 649 lb/d | all year | 101 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 101 |
| Oil and grease, hexane extr method | monthly average | report only (mg/L) | all year | 101 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 101 |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) | all year | 101 |
| Oil and grease, hexane extr method | monthly average | ≤ 524 lb/d | all year | 101 |
| Oil and grease, hexane extr method | monthly average | ≤ 92.7 lb/d | all year | 101 |
| Oil and grease, hexane extr method | daily maximum | ≤ 1195 lb/d | all year | 101 |
| Oil and grease, hexane extr method | daily maximum | ≤ 278 lb/d | all year | 101 |
| Cyanide, total [as CN] | monthly average | report only (mg/L) | all year | 101 |
| Cyanide, total [as CN] | daily maximum | report only (mg/L) | all year | 101 |
| Cyanide, total [as CN] | monthly average | ≤ 9.38 lb/d | all year | 101 |
| Cyanide, total [as CN] | daily maximum | ≤ 17.3 lb/d | all year | 101 |
| Nickel, total recoverable | monthly average | report only (mg/L) | all year | 101 |
| Nickel, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Nickel, total recoverable | monthly average | ≤ 34.4 lb/d | all year | 101 |
| Nickel, total recoverable | daily maximum | ≤ 57.5 lb/d | all year | 101 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 101 |
| Zinc, total recoverable | monthly average | report only (mg/L) | all year | 101 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Zinc, total recoverable | monthly average | ≤ 23.9 lb/d | all year | 101 |
| Zinc, total recoverable | monthly average | ≤ 1.85 lb/d | all year | 101 |
| Zinc, total recoverable | daily maximum | ≤ 45.1 lb/d | all year | 101 |
| Zinc, total recoverable | daily maximum | ≤ 5.56 lb/d | all year | 101 |
| Chromium, total recoverable | monthly average | report only (mg/L) | all year | 101 |
| Chromium, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Chromium, total recoverable | monthly average | ≤ 24.7 lb/d | all year | 101 |
| Chromium, total recoverable | daily maximum | ≤ 40 lb/d | all year | 101 |
| Copper, total recoverable | monthly average | report only (mg/L) | all year | 101 |
| Copper, total recoverable | daily maximum | report only (mg/L) | all year | 101 |
| Copper, total recoverable | monthly average | ≤ 29.9 lb/d | all year | 101 |
| Copper, total recoverable | daily maximum | ≤ 48.8 lb/d | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (mg/L) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (mg/L) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (mg/L) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (mg/L) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (lb/d) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | monthly average | report only (lb/d) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (lb/d) | all year | 101 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (lb/d) | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Total toxic organics [TTO] [40 CFR433] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Total toxic organics [TTO] [40 CFR433] | daily maximum | report only (mg/L) | Mar, Jun, Sep, Dec | 101 |
| Total toxic organics [TTO] [40 CFR433] | daily maximum | ≤ 30.7 lb/d | Mar, Jun, Sep, Dec | 101 |
| Total toxic organics [TTO] [40 CFR433] | daily maximum | ≤ 30.7 lb/d | Mar, Jun, Sep, Dec | 101 |
Cited limits by parameter: Indiana's rules and the federal ones.
Same industry: the 54 Primary Metal Industries permits in Indiana.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/IN0063711 · MCP: https://passage-data.com/mcp