| Waste Management-Greene Valley Landfill | 31 | 42 | 214,728.42 |
| Meyer Material Co | 39 | 53 | 79,834.10 |
| Bp Naperville Complex | 44 | 239 | 79,184.52 |
| Solar Communications Inc | 4 | 8 | 70,054.23 |
| Prairie Material Sales Inc | 39 | 53 | 68,554.41 |
| Naperville Ready Mix Inc | 39 | 53 | 60,806.21 |
| Nicor Gas | 41 | 52 | 59,160.30 |
| Vulcan Construction Materials Lp | 2 | 5 | 55,580.00 |
| Nalco Chemical Co - Corp & Tech Center | 39 | 101 | 40,270.36 |
| Suncraft Technologies Inc | 2 | 4 | 39,860.00 |
| Greif Bros. Corp | 44 | 62 | 30,187.10 |
| Kraft Foods Inc | 39 | 67 | 26,264.31 |
| Solar Communications Inc | 38 | 44 | 20,477.09 |
| K-Five Construction Corp | 2 | 7 | 16,480.00 |
| Elmhurst-Chicago Stone Co | 2 | 19 | 8,702.64 |
| Edward Hospital | 40 | 57 | 8,678.57 |
| K-Five Construction Corp | 16 | 16 | 7,129.60 |
| Master Cleaners | 1 | 1 | 5,980.00 |
| Buikema Ace Hardware | 17 | 17 | 5,820.59 |
| Dow Jones & Co Inc | 1 | 3 | 5,500.00 |
| Dukane Precast Co | 2 | 2 | 4,260.00 |
| Nalge Nunc International | 2 | 2 | 3,920.00 |
| Clothes Clean Center | 1 | 1 | 3,536.00 |
| Illinois Tollway - Maintenance Bldg 8 | 41 | 51 | 3,297.89 |
| Bell Laboratories/Div Of Lucent Technologies | 42 | 46 | 2,955.98 |
| One Hour Martinizing Co | 1 | 1 | 2,000.00 |
| Cienega Inc (Liberty Cleaners) | 1 | 1 | 1,980.00 |
| Healthy Cleaners | 1 | 1 | 1,980.00 |
| Battery Builders Inc | 3 | 9 | 1,425.25 |
| Nicor Gas | 7 | 7 | 501.77 |
| Odermath Usa Inc | 2 | 6 | 333.56 |
| Abb Air Preheater Raymond Operations Lab | 16 | 34 | 326.95 |
| Battery Builders Inc. | 1 | 2 | 20.00 |
