| Polluter | Pollutants | Sources | Emissions |
|---|---|---|---|
| American Iron Oxide Company | 42 | 93 | 209,892.89 |
| Beta Steel Corp | 41 | 59 | 1,140,468.58 |
| Cargill Burns Harbor Grain El | 41 | 139 | 149,491.99 |
| Levy Co., Calumite/Finishing Plant | 27 | 47 | 21,575.91 |
| Mid-Continent Coal & Coke-Poi | 3 | 12 | 103,658.89 |
| National Steel Corp | 42 | 111 | 574,244.75 |
| Portside Energy Corporation | 46 | 136 | 607,385.64 |
| Precoat Metals | 47 | 226 | 791,768.66 |
| Superior Environmental Remediation, Inc | 1 | 2 | 16,484.90 |
| Walsh & Kelly Inc. | 19 | 21 | 22,192.55 |