| Polluter | Pollutants | Sources | Emissions |
|---|---|---|---|
| Carbide Metals Inc. | 1 | 1 | 5.00 |
| Exal Corp. | 3 | 6 | 4,759.00 |
| Mahoning Paint Corp. | 3 | 3 | 750.00 |
| Marathon Oil Co.Youngstown Oh Terminal | 4 | 8 | 1,240.00 |
| Parker Hannifin Gear Pump Div. Intertech Drive | 0 | 0 | 0.00 |
| Parker Hannifin Gear Pump Div. | 1 | 2 | 121.00 |
| Spectrum Metal Finishing Inc. | 4 | 8 | 82,300.00 |
| Steel City Corp. | 2 | 4 | 26,850.00 |
| United Foundries Inc. | 1 | 1 | 250.00 |
| V & M Star | 40 | 148 | 1,200,257.90 |
| Youngstown Thermal | 77 | 248 | 2,654,563.67 |