| Polluter | Pollutants | Sources | Emissions |
|---|---|---|---|
| Ash Grove Cement Company | 70 | 146 | 6,453,314.94 |
| Northwest Pipeline Corporation | 41 | 165 | 222,245.79 |
| Halfway Landfill | 28 | 28 | 151.06 |
| Huntington Landfill | 28 | 28 | 352.46 |
| Haines Landfill | 28 | 28 | 328.92 |
| Unity Landfill | 28 | 28 | 461.64 |
| Richland Disposal Site | 28 | 28 | 461.64 |
| Agcw Solid Waste Disposal Site | 28 | 28 | 443.54 |
| Baker Sanitary Landfill | 28 | 28 | 7,386.25 |
| Oregon Trail Cleaners Llc | 1 | 1 | 57.00 |