Updated in July 2008

• ACCION International
• Applus Technologies Inc.
• Arnold Worldwide
• Atlas Watersystems Inc.
• Babel's Painting & Decorating
• Babson College
• Baystate Medical Center
• Berluti & McLaughlin LLC
• Big Y Supermarkets 
• Boston College
• Boston Green Tourism
• CDM
• Cape Cod Hospital
• Capital Paper Recycling
• Cartridge World Bedford
• CB Richard Ellis-Whittier Partners
• Center for Ecological Technology Inc.
• City of Easthampton
• City of Lowell
• City of Newburyport
• The Colonnade Hotel
• Consigli Construction Co. Inc.
• Dana-Farber Cancer Institute
• Dean College
• Discover Marble & Granite
• Dollars & Sense
• Dunkin' Brands Inc.
• E.L. Harvey & Sons Inc.
• ECO MV
• EMC Corp.
• ENSR
• Entegris Inc.
• Gannett Fleming, Inc.
• Genzyme Corp.
• greenGoat
• Groundscapes Express, Inc.
• Gruenewald Manufacturing Co.
• Hammsmith Sysco
• Harvard University
• Hines/NOP Riverfront LLC
• HMEA
• Holy Family Hospital & Medical Center
• HVAC
• Hyannis Country Garden
• Hyde Manufacturing Co. Inc.
• Imagitas, a Pitney Bowes Co.
• Level 1 Maintenance
• LPM Holding
• Lydia Taft House
• Marblehead Savings Bank
• Mashpee Environmental Coalition
• Massachusetts Convention Center Authority
• Massachusetts Department of Conservation & Recreation, Southeast
• Massachusetts Department of Corrections
• Massachusetts Department of Environmental Protection
• Massachusetts Hospital Association
• Massachusetts Institute of Technology (MIT)
• Massachusetts Port Authority 
• MassRecycle
• The MathWorks Inc.
• Meridian Associates
• Millipore Corp.
• Museum of Science
• Mykrolis Corp.
• National Sales Associates
• National Waste Service
• NextWorth Solutions Inc.
• Northeastern University
• PeopleCube
• Polar Tech LLC
• Polaroid Corp.
• Raytheon Co.
• Recycle Resources
• Recycled Office Products Co.
• Roche Bros. Supermarkets
• Sandpiper Mortgage
• Satin Fitness
• Save That Stuff
• The Seaport Hotel
• Shaw's Supermarkets Inc.
• Shriner's Hospital for Children
• The Simpson Corp.
• Sisters of St. Joseph
• Staples Inc.
• The Stop & Shop Supermarket Co. LLC
• Suffolk University
• TD Banknorth Garden
• TechTarget
• Town of Seekonk
• Triumvirate Environmental
• UNICCO
• Unidine Corp.
• University of Massachusetts-Dartmouth
• University of Massachusetts Medical
• U.S. Internal Revenue Service
• Vertex Pharmaceuticals
• WasteCap of Massachusetts
• Waste Management of Central Massachusetts
• Waters Corp.
• Whole Foods Market
• Yorkshire Paper Corp.