| Waste Management, Inc. |
1,215 |
| Republic Services, Inc. |
796 |
| Wentworth Institute of Technology |
444 |
| MWH Global, Inc. |
390 |
| Caraustar Industries, Inc. |
313 |
| Safety-Kleen, Inc. |
302 |
| Pentair, Inc. |
287 |
| Veolia Environmental Services |
222 |
| Atomic Energy of Canada Limited |
216 |
| Aleris International, Inc. |
187 |
| TRC Companies, Inc. |
184 |
| Veolia Water North America |
172 |
| Waste Connections, Inc. |
171 |
| Philip Services Corporation (PSC) |
116 |
| Schnitzer Steel Industries , Inc. |
112 |
| Chelan County Public Utility District |
100 |
| GZA GeoEnvironmental, Inc |
95 |
| Veolia Energy North America |
85 |
| Savage Services Corporation |
79 |
| Parametrix, Inc. |
77 |
| Veolia Environmental Services Plc |
75 |
| Biffa Holdings Ltd |
72 |
| Newalta Corporation |
68 |
| American Ecology Corporation |
63 |
| Waste Industries USA, Inc. |
60 |
| Surrey County Council |
60 |
| WRC |
59 |
| Peppers and Rogers Group |
57 |
| Metro Water Reclamation District of Grea |
54 |
| Heritage Environmental Services, LLC |
54 |
| Alter Trading Corporation |
47 |
| Medical Waste Inc |
43 |
| Parkson Corporation |
40 |
| Griffin Industries, Inc. |
40 |
| Waste Recycling Group Ltd |
40 |
| Trojan Technologies Inc. |
37 |
| Advanced Disposal |
34 |
| Larson Design Group Inc |
32 |
| United Air Specialists, Inc. |
32 |
| Metropolitan St. Louis Sewer District |
32 |
| Nuclear Fuel Services, Inc |
31 |
| Essex-Windsor Solid Waste Authority |
29 |
| Recycle Bank |
26 |
| Smurfit Kappa UK Limited |
24 |
| Amadeus International Inc. |
23 |
| Texas Disposal Systems |
22 |
| Electronic Recyclers |
20 |
| Metech International, LLC |
19 |
| Envirite Inc |
19 |
| Koester Associaties |
19 |
| EDCO Disposal Corporation |
18 |
| EnviroSolutions, Inc. |
18 |
| Melbourne Water |
18 |
| Greenleaf Compaction |
17 |
| MEI Complete Waste Management |
17 |
| Haz-Mat Response, Inc |
17 |
| Ecs Refining |
16 |
| Southeastern Public Svc Auth |
16 |
| Dekker Vacuum Technologies, Inc |
16 |
| EcoMaine |
16 |
| West Oxfordshire District Council |
16 |
| Liquid Environmental Solutions |
15 |
| Reimelt Corporation |
14 |
| Balcones Resources Inc |
14 |
| Recycled Paper Greetings Inc |
14 |
| Earth Protection Svcs., Inc. |
14 |
| Athens Services |
14 |
| Alexandria Sanitation Authority |
14 |
| Great Valley Recycling Inc |
14 |
| Privax International Limited |
14 |
| Kjwb |
14 |
| Allied Blower & Sheet Metal Ltd. |
14 |
| Chem-Nuclear Systems LLC |
14 |
| CWI |
14 |
| All Chemical Disposal Inc |
13 |
| Arizona Water Company |
13 |
| Western Metals Recycling |
13 |
| Delaware Solid Waste Authority |
12 |
| Avalon Holdings Corporation |
12 |
| Worth & Company, Inc |
12 |
| Altec Environmental |
12 |
| Cwpm LLC |
12 |
| Stavola Companies |
12 |
| Auburn Refuse Collection |
12 |
| Greentar North America |
12 |
| Direct Line Environmental Services Inc. |
12 |
| H. B. Mellott Estate, Inc. |
11 |
| ECO2 Plastics |
11 |
| Otto Environmental Systems |
11 |
| ABC Disposal Service, Inc. |
11 |
| Connecticut Resources Recovery |
11 |
| Fortune Industries Inc. |
11 |
| Environmental Filtration Inc |
11 |
| Gopher Resource Corp |
11 |
| nuflowtech |
11 |
| A S Metals |
10 |
| American Disposal Systems Inc |
10 |
| Environmental Waste Management Associates |
10 |
| E L Harvey |
10 |
| Somat Engineering Inc. |
10 |
| TTI Environmental |
10 |
| Central Virginia Waste Management Authority |
10 |
| Sunset Scavenger Co |
10 |
| Agrivert, Ltd. |
10 |
| Garner Environmental Svc Inc |
9 |
| Cbsi |
9 |
| BroadBent and Associates Inc. |
9 |
| Hazardous Elimination Corp. |
9 |
| Emcon Facility Management |
9 |
| Goettsch International Inc |
9 |
| Ozark City Street Dept |
9 |
| GSI Environnement Inc. |
9 |
| GBSYNERGY |
9 |
| Environmental Reclamation Services, Inc. |
9 |
| Interstate Waste |
9 |
| SustainableCircles Corp |
9 |
| update CRM Inc. |
9 |
| Tandridge District Council |
9 |
| TOTALL Metal Recycling |
9 |
| Atlas Disposal Industries |
8 |
| Chemical Solvents Inc |
8 |
| Mister Sweeper Inc |
8 |
| Mosquitonix |
8 |
| Oil Mop Inc |
8 |
| Rotochopper Inc |
8 |
| South San Francisco Scavenger |
8 |
| Waste and Resources Action Programme (WRAP) |
8 |
| Sacramento Recycling |
8 |
| Hydro Klean, Inc. |
8 |
| Groot Recycling & Waste Svc |
8 |
| Liberty Tire Recycling |
8 |
| Skytrak International Ltd |
8 |
| Aluminum Recovery Technologies |
7 |
| We Recycle |
7 |
| Gem Fabrication Corporation |
7 |
| The Human Resource Department |
7 |
| Ids |
7 |
| Teris |
7 |
| Werlor Waste Control Inc |
7 |
| Strata-G, LLC |
7 |
| Gallegos Enterprises Inc |
7 |
| Wastecap Wisconsin |
7 |
| In-Pipe Technology |
7 |
| Budget Waste Inc. |
7 |
| Keefe Kaplan Maritime Inc |
7 |
| Waste Remedies |
7 |
| Chem Group Services |
7 |
| Recreation Department |
7 |
| City of Dade City |
7 |
| ENVIRONMENTAL WASTE CONTROLS LIMITED |
7 |
| W&M Environmental Group |
6 |
| Turbo Haul Inc |
6 |
| Basin Water Inc. |
6 |
| TURI/University of Massachusetts Lowell |
6 |
| ABT, Inc. |
6 |
| Monroe County Solid Waste Mgt. District |
6 |
| Aspen Waste Systems |
6 |
| Dawnbrite Inc. |
6 |
| ZYNAP |
6 |
| Fluid Tech, Inc |
6 |
| North Wales Water Authority |
6 |
| 20/20 Recycle Centers |
6 |
| Vessco Inc |
6 |
| Catalytic Solutions Inc |
6 |
| Alpha Terra Science |
6 |
| Cilk Arts |
6 |
| Phoenix Solutions Co |
6 |
| Envision Plastics |
6 |
| Resource Management Companies |
6 |
| NICHOLL FOOD PACKAGING LIMITED |
6 |
| GREENMECH LIMITED |
6 |
| EUROPEAN EXHAUST & CATALYST LIMITED |
6 |
| Burrtec Waste Industries |
5 |
| Advanced Chemical Transport |
5 |
| Burgmeier'S Hauling |
5 |
| Resource Management |
5 |
| Solid Waste Systems Inc |
5 |
| T W Co |
5 |
| FitSense Technology Inc. |
5 |
| Rocket Mobile |
5 |
| Resolve Marine Group, Inc. |
5 |
| Intelligen Inc |
5 |
| Montgomery Scrap Corp |
5 |
| Cansolv Technologies |
5 |
| Symtrax Corporation |
5 |
| American Box |
5 |
| Pacific Environmental Corp |
5 |
| Kestrel Hawk Landfill |
5 |
| Continental Biomass Industries, Inc. |
5 |
| Sprint Recycling |
5 |
| South East Water Limited |
5 |
| Tahoe-Truckee Sanitation Agency |
5 |
| Recreation Department |
5 |
| Bay Area Rescue Mission |
5 |
| Alpheus Environmental Limited |
5 |
| AGEST Trustee Office |
5 |
| Aqua-Power |
5 |
| Crown Disposal Co. Inc. |
5 |
| Total Waste Management Alliance PLC |
5 |
| Mansfield Sales Partners |
5 |
