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Blast Furnaces And Steel Mills, Bourbonnais, Illinois. NPDES permit IL0035297, in force until May 31, 2030. Last 12 months: no values over a limit, 110 required values missing, 11 of 48 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | monthly minimum | ≥ 6.5 SU | all year | 001 |
| pH | monthly maximum | ≤ 9 SU | all year | 001 |
| Oil & Grease | semi-annual average | report only (mg/L) | Jan, Jul | 001 |
| Oil & Grease | semi-annual maximum | report only (mg/L) | Jan, Jul | 001 |
| Cadmium, total [as Cd] | semi-annual average | report only (mg/L) | Jan, Jul | 001 |
| Cadmium, total [as Cd] | semi-annual maximum | report only (mg/L) | Jan, Jul | 001 |
| Copper, total [as Cu] | quarterly maximum | ≤ .0464 mg/L | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Iron, total [as Fe] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Nickel, total [as Ni] | semi-annual average | report only (mg/L) | Jan, Jul | 001 |
| Nickel, total [as Ni] | semi-annual maximum | report only (mg/L) | Jan, Jul | 001 |
| Zinc, total [as Zn] | quarterly maximum | ≤ .2906 mg/L | Jan, Apr, Jul, Oct | 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 |
| pH | monthly minimum | ≥ 6.5 SU | all year | 002 |
| pH | monthly maximum | ≤ 9 SU | all year | 002 |
| Oil & Grease | semi-annual average | report only (mg/L) | Jan, Jul | 002 |
| Oil & Grease | semi-annual maximum | report only (mg/L) | Jan, Jul | 002 |
| Cadmium, total [as Cd] | semi-annual average | report only (mg/L) | Jan, Jul | 002 |
| Cadmium, total [as Cd] | semi-annual maximum | report only (mg/L) | Jan, Jul | 002 |
| Copper, total [as Cu] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Iron, total [as Fe] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Iron, total [as Fe] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Nickel, total [as Ni] | semi-annual average | report only (mg/L) | Jan, Jul | 002 |
| Nickel, total [as Ni] | semi-annual maximum | report only (mg/L) | Jan, Jul | 002 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 002 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 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 |
| pH | monthly minimum | ≥ 6.5 SU | all year | 003 |
| pH | monthly maximum | ≤ 9 SU | all year | 003 |
| Oil & Grease | semi-annual average | report only (mg/L) | Jan, Jul | 003 |
| Oil & Grease | semi-annual maximum | report only (mg/L) | Jan, Jul | 003 |
| Cadmium, total [as Cd] | semi-annual average | report only (mg/L) | Jan, Jul | 003 |
| Cadmium, total [as Cd] | semi-annual maximum | report only (mg/L) | Jan, Jul | 003 |
| Copper, total [as Cu] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Iron, total [as Fe] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Iron, total [as Fe] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Nickel, total [as Ni] | semi-annual average | report only (mg/L) | Jan, Jul | 003 |
| Nickel, total [as Ni] | semi-annual maximum | report only (mg/L) | Jan, Jul | 003 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 003 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 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 |
| pH | monthly minimum | ≥ 6.5 SU | all year | 004 |
| pH | monthly maximum | ≤ 9 SU | all year | 004 |
| Oil & Grease | semi-annual average | report only (mg/L) | Jan, Jul | 004 |
| Oil & Grease | semi-annual maximum | report only (mg/L) | Jan, Jul | 004 |
| Cadmium, total [as Cd] | semi-annual average | report only (mg/L) | Jan, Jul | 004 |
| Cadmium, total [as Cd] | semi-annual maximum | report only (mg/L) | Jan, Jul | 004 |
| Copper, total [as Cu] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Iron, total [as Fe] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Iron, total [as Fe] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Nickel, total [as Ni] | semi-annual average | report only (mg/L) | Jan, Jul | 004 |
| Nickel, total [as Ni] | semi-annual maximum | report only (mg/L) | Jan, Jul | 004 |
| Zinc, total [as Zn] | quarterly average | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 22 Primary Metal Industries permits in Illinois.
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On EPA ECHO: Facility report · DMR history
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