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Blast Furnaces And Steel Mills, major discharger, Granite City, Illinois. NPDES permit IL0000329, in force until Jun 30, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | monthly minimum | ≥ 6 SU | all year | 001 |
| pH | monthly maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 12 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 24 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 2502 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 5004 lb/d | all year | 001 |
| Oil & Grease | 30-day average | ≤ 15 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 30 mg/L | all year | 001 |
| Oil & Grease | 30-day average | ≤ 1511 lb/d | all year | 001 |
| Oil & Grease | daily maximum | ≤ 3492 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.3 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.3 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 12.4 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 mg/L | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 688 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 521 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 479 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 834 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1188 lb/d | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2585 lb/d | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3128 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1188 lb/d | Jan, Feb, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 5.7 mg/L | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.2 mg/L | Apr, May, Sep, Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1188 lb/d | Jun–Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1292 lb/d | Apr, May, Sep, Oct | 001 |
| Phosphorus, total [as P] | quarterly maximum | report only (mg/L) | Jan, Apr, Jul, Oct | 001 |
| Cyanide, weak acid, dissociable | 30-day average | ≤ .0052 mg/L | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ .022 mg/L | all year | 001 |
| Cyanide, weak acid, dissociable | 30-day average | ≤ 1.1 lb/d | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 4.6 lb/d | all year | 001 |
| Cyanide, total [as CN] | 30-day average | ≤ .1 mg/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ .2 mg/L | all year | 001 |
| Cyanide, total [as CN] | 30-day average | ≤ 19 lb/d | all year | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ 35 lb/d | all year | 001 |
| Fluoride, total [as F] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Fluoride, total [as F] | daily maximum | ≤ 834 lb/d | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year | 001 |
| Barium, total [as Ba] | daily maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Iron, total [as Fe] | 30-day average | ≤ 2 mg/L | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 4 mg/L | all year | 001 |
| Iron, total [as Fe] | 30-day average | ≤ 417 lb/d | all year | 001 |
| Iron, total [as Fe] | daily maximum | ≤ 834 lb/d | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 1 mg/L | all year | 001 |
| Iron, dissolved [as Fe] | daily maximum | ≤ 209 lb/d | all year | 001 |
| Lead, total [as Pb] | 30-day average | ≤ .09 mg/L | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .4 mg/L | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | 30-day average | ≤ 5.3 lb/d | Jan, Apr, Jul, Oct | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 16 lb/d | Jan, Apr, Jul, Oct | 001 |
| Manganese, total [as Mn] | daily maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | 30-day average | ≤ .17 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .96 mg/L | all year | 001 |
| Zinc, total [as Zn] | 30-day average | ≤ 12 lb/d | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 33 lb/d | all year | 001 |
| Antimony, total [as Sb] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year | 001 |
| Tetrachloroethylene | daily maximum | report only (mg/L) | Jan, Jul | 001 |
| Phenol | daily maximum | ≤ .1 mg/L | all year | 001 |
| Phenol | 30-day average | ≤ 5 lb/d | all year | 001 |
| Phenol | daily maximum | ≤ 10 lb/d | all year | 001 |
| Naphthalene | daily maximum | report only (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 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorotridecanoic acid (PFTrDA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorotetradecanoic acid (PFTeDA) | daily maximum | report only (ng/L) | all year | 001 |
| N-ethyl perfluorooctanesulfonamidoethanol (NEtFOSE) | daily maximum | report only (ng/L) | all year | 001 |
| N-methyl perfluorooctanesulfonamidoethanol (NMeFOSE) | daily maximum | report only (ng/L) | all year | 001 |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | daily maximum | report only (ng/L) | all year | 001 |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorodecanesulfonic acid (PFDS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoroheptanesulfonic acid (PFHpS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | 001 |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | daily maximum | report only (ng/L) | all year | 001 |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | daily maximum | report only (ng/L) | all year | 001 |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoropentanesulfonic acid (PFPeS) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorononanesulfonic acid (PFNS) | daily maximum | report only (ng/L) | all year | 001 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | 001 |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoro(2-ethoxyethane)sulfonic acid (PFEESA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluorododecanesulfonic acid (PFDoS) | daily maximum | report only (ng/L) | all year | 001 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | daily maximum | report only (ng/L) | all year | 001 |
| N-methyl perfluorooctanesulfonamide (NMeFOSA) | daily maximum | report only (ng/L) | all year | 001 |
| N-ethyl perfluorooctanesulfonamide (NEtFOSA) | daily maximum | report only (ng/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 10 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 20 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 2085 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 4170 lb/d | all year | 001 |
| PFAS Sum | daily maximum | report only (ng/L) | all year | 001 |
| 3-Perfluoropropyl propanoic acid (3:3 FTCA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | daily maximum | report only (ng/L) | all year | 001 |
| 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid (9Cl-PF3ONS) | daily maximum | report only (ng/L) | all year | 001 |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | daily maximum | report only (ng/L) | all year | 001 |
| 3-Perfluoroheptyl propanoic acid (7:3 FTCA) | daily maximum | report only (ng/L) | all year | 001 |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | daily maximum | report only (ng/L) | all year | 001 |
| 2H,2H,3H,3H-Perfluorooctanoic acid (5:3 FTCA) | daily maximum | report only (ng/L) | all year | 001 |
| Tetrachloroethylene | daily maximum | ≤ 1.1 lb/d | Jun, Dec | B01 |
| Naphthalene | daily maximum | ≤ .69 lb/d | Jan, Apr, Jul, Oct | B01 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | B01 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | B01 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | C01 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | C01 |
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
Your permit document is the final word. As JSON: /api/v1/permits/IL0000329 · MCP: https://passage-data.com/mcp