| Polluter | Pollutants | Sources | Emissions |
|---|---|---|---|
| Cinergy Noblesville Generating Station | 4 | 5 | 59,382.20 |
| Firestone Industrial Products | 43 | 185 | 522,798.09 |
| Indiana Ductile Llc | 10 | 42 | 67,967.37 |
| Industrial Dielectrics, Inc. | 6 | 23 | 155,193.01 |
| Irving Materials, Inc./Stony Creek Stone | 3 | 20 | 80,403.95 |
| Mar-Zane Plant #18 | 20 | 20 | 102,118.52 |
| Prairie Group - Plant 79 | 10 | 27 | 25.20 |
| Psi Energy-Noblesville | 88 | 359 | 10,015,296.06 |