| Kinzua Resources, L.L.C. | 83 | 247 | 0.00 |
| International Paper Company | 79 | 166 | 0.00 |
| Northwest Pipeline Corp. | 49 | 118 | 824,763.61 |
| J.R. Simplot Company | 41 | 121 | 16,390.48 |
| Lamb-Weston, Inc. | 40 | 40 | 1,336.64 |
| Milton / Freewater Landfill | 28 | 28 | 3,430.16 |
| Umatilla Butte Landfill | 28 | 28 | 2,595.59 |
| Umatilla Depot Landfill | 28 | 28 | 3,583.27 |
| Rahns Sanitary Landfill | 28 | 28 | 396.28 |
| Pilot Rock Landfill | 28 | 28 | 461.64 |
| Pendleton Landfill | 28 | 28 | 7,786.76 |
| Hermiston Generating Company, L.P. And P | 21 | 44 | 1,076,293.27 |
| Fleetwood Travel Trailers Of Oregon, Inc | 4 | 4 | 50,621.80 |
| Lippert Components Inc. | 4 | 4 | 39.26 |
| U.S. Army Umatilla Chemical Depot | 3 | 3 | 15.00 |
| Liberty Cleaners & Laundromat | 1 | 1 | 174.00 |
| Best Cleaners | 1 | 1 | 275.00 |
| 2 Hour Cleanery | 1 | 1 | 90.00 |
