| Polluter | Pollutants | Sources | Emissions |
|---|---|---|---|
| Metal Technologies, Inc.-West Allis Ductile Iron | 10 | 104 | 647,129.34 |
| Milwaukee Gray Iron, Llc | 12 | 53 | 390,101.15 |
| Monopanel Technologies, Inc. | 2 | 5 | 3,499.76 |
| Motor Castings Co - Plant 1 | 12 | 105 | 179,756.48 |
| Plating Engineering | 6 | 7 | 3,692.16 |
| Pressed Steel Tank Co Inc | 7 | 46 | 33,329.72 |
| Quad/Graphics, Inc | 7 | 92 | 99,536.87 |
| Unit Drop Forge Co Inc | 9 | 27 | 29,010.84 |
| Univar Usa Inc. Milwaukee | 2 | 4 | 13.00 |
| West Allis Memorial Hospital | 28 | 92 | 28,270.58 |