| Facility Name (Alias/Former Names) | City, State, Country | Program Years |
| Brenntag Great Lakes (Milwaukee Solvents; Milsolv) | Menomonee Falls, WI, USA | |2005| |2001| |
| CEMTECH, LP (Medusa) | Wampum, PA, USA | |1997| |
| Concentric LLC (Mesa Technical Associates) | Cobleskill, NY, USA | |2025| |2021| |
| Dynamic Recycling, LLC (MXI Environmental) | Bristol, TN, USA | |2024| |2020| |2017| |
| EQ Resource Recovery (Michigan Recovery Systems, Inc.) | Romulus, MI, USA | |2005| |2003| |2002| |2001| |1999| |
| Giant Resource Recovery Co. (M & M Chemical Company; GRR) | Attalla, AL, USA | |2025| |2022| |2020| |2018| |2016| |2015| |2012| |2011| |2010| |2008| |2004| |2002| |1998| |
| Industrial Container Services (Moore Drums, Inc.) | Charleston, SC, USA | |1998| |
| Koppers Recovery Resources (Muncy Cogeneration Plant) | Montgomery, PA, USA | |2008| |
| LJP Waste Solutions / MWPC (Minnesota Waste Processing Co.) | Mankato, MN, USA | |2025| |
| Lynco Oil Services (Makers Oil Corporation) | Giddings, TX, USA | |2016| |
| M&K Recovery Group | Austin, TX, USA | |2023| |2019| |
| MacLand Disposal Center, Inc. | Moss Point, MS, USA | |2014| |2009| |
| Madewell & Madewell | Jones, OK, USA | |2013| |
| Magma Tratamientos | Massalfassar, Valencia, Spain | |2015| |
| Maharashtra Enviro Power Limited | Pune, Maharashtra, India | |2024| |2015| |2010| |
| Major Equipment and Remediation | Morgan City, LA, USA | |2018| |2013| |2006| |
| ManEco, S.R.L. | Ceranesi, Liguria, Italy | |2012| |
| Martin Marietta Hunter Cement Plant (TXI Operations; Texas Industries, Inc) | New Braunfels, TX, USA | |2004| |
| Martin Marietta Midlothian Cement Plant (TXI Operations; Texas Industries, Inc) | Midlothian, TX, USA | |2008| |2007| |2005| |2003| |2001| |1999| |
| Mastermelt America LLC | Sweetwater, TN, USA | |2025| |2021| |2017| |2013| |
| Mastermelt Refining Services, Ltd. | Buxton, Derbyshire, United Kingdom (England) | |2022| |
| Mauser Packaging (Consolidated Container) | Minneapolis, MN, USA | |2025| |2021| |2014| |
| Mauser Packaging | Houston, TX, USA | |2025| |
| Mauser Packaging Solutions (Industrial Container Services; Allied Drum) | Louisville, KY, USA | |2024| |2020| |2016| |2011| |
| Mauser Packaging Solutions (Industrial Container Services; Abbey Drum Co.) | Baltimore, MD, USA | |2024| |2011| |2007| |
| Mauser Packaging Solutions (Industrial Container Services; Belfer Drum) | Grand Rapids, MI, USA | |2022| |2018| |2012| |2006| |
| Mauser Packaging Solutions (Industrial Container Services; Twin City Container) | Cannon Falls, MN, USA | |2021| |
| Mauser Packaging Solutions (Industrial Container Services; Twin City Container) | Hastings, MN, USA | |2022| |
| Mauser Packaging Solutions (Industrial Container Services; IFCO Systems; Pal Ex Container Systems) | Charlotte, NC, USA | |2022| |2016| |
| Mauser Packaging Solutions (National Container Group) | Charlotte, NC, USA | |2023| |2019| |
| Mauser Packaging Solutions (Recycle Inc. East; National Container Group) | South Plainfield, NJ, USA | |2023| |2020| |2016| |2010| |2006| |2000| |
| Mauser Packaging Solutions (Industrial Container Services; ICS-Questar) | Cincinnati, OH, USA | |2024| |2020| |
| McBride Operating Disposal, LLC | Overton, TX, USA | |2025| |
| McBride Operating Disposal, LLC | Waskom, TX, USA | |2025| |
| McCutcheon Enterprises, Inc. | Apollo, PA, USA | |2025| |2022| |2016| |2014| |2010| |
| McKenzie Regional Waste Landfill | High Level, AB, Canada | |2024| |
| McQuillan Envirocare Ltd | Antrim, County Antrim, United Kingdom (Northern Ireland) | |2013| |
| MDJ Light Brothers (SP) Ltd. | Lewes, East Sussex, United Kingdom (England) | |2009| |
| Medical Waste Services | Paramount, CA, USA | |2022| |2016| |
| Medicare Environmental Management Pvt. Ltd. | Dabaspete, Karnataka, India | |2017| |
| MediWaste Disposal, LLC | Corona, CA, USA | |2022| |
| Medsharps, LLC | Schertz, TX, USA | |2022| |
| Mencast Offshore & Marine Pte Ltd | Singapore, Singapore | |2021| |2018| |
| MEP Enviro Technology Sdn. Bhd. (Ming Engineering Plastic) | Bukit Minyak, Penang, Malaysia | |2024| |2020| |2017| |
| MEP Enviro Technology Sdn. Bhd. (Ming Engineering Plastic) | Seberang Perai, Penang, Malaysia | |2025| |2022| |
| Mercury Recycling Limited | Trafford Park, Manchester, United Kingdom (England) | |2015| |2011| |
| Mercury Refining (MWS NY) | Albany, NY, USA | |1995| |
| Meru Metal (M) Sdn Bhd | Klang, Selangor, Malaysia | |2019| |
| Mesa Oil | Commerce City, CO, USA | |2019| |
| Meta Service S.R.L. | Aci Sant'Antonio, Catania, Sicilia, Italy | |2012| |
| Metallix Refining Inc. | Greenville, NC, USA | |2023| |2019| |2014| |2010| |
| Metals Etc. | Sun Valley, CA, USA | |2007| |
| Metals Management, Inc. | Sherman, MS, USA | |2006| |
| Metalwave, Inc. | Amesbury, MA, USA | |2015| |
| Metalworking Lubricants | Indianapolis, IN, USA | |2018| |
| Metech International | Gilroy, CA, USA | |2014| |2006| |2002| |
| Metech International | Creedmoor, NC, USA | |2014| |
| Metech Recycling | Denver, CO, USA | |2025| |2020| |2014| |
| Metech Recycling (Singapore) Pte. Ltd. | Singapore, Singapore | |2016| |
| Metrex BV (Moxba) | Heerlen, Limburg, Netherlands | |2024| |2008| |
| Metro Green LLC | Mount Vernon, NY, USA | |2025| |2022| |
| MetroPaint | Portland, OR, USA | |2019| |
| Metropolitan Paper Recycling | Brooklyn, NY, USA | |2017| |
| Meyer Industrial Container (Industrial Container Services ) | Chicago, IL, USA | |2022| |2018| |
| Meyer Steel Drum (Industrial Container Services; ICS; Meyer Steel Drum) | Chicago, IL, USA | |2022| |2006| |
| Mid-America Fuels (McGinnis; National Maintenance) | Ledbetter, KY, USA | |2006| |
| Mid-America Steel Drum | St. Francis, WI, USA | |2017| |
| Mid-America Steel Drum Co., Inc. | Oak Creek, WI, USA | |2023| |2019| |2016| |
| Middlesex County Landfill | East Brunswick, NJ, USA | |2012| |
| Midland Resource Recovery Inc. (MRRI) | Philippi, WV, USA | |2023| |2018| |2007| |
| Midstate Environmental Services (Midstate Oil) | Robstown, TX, USA | |2017| |
| Mid-Way Environmental | Stroud, OK, USA | |2022| |
| Mid-Way Environmental Services, Inc. | Chandler, OK, USA | |2025| |2015| |
| Midwestern Reclamation | Snyder, TX, USA | |2017| |2013| |2009| |2005| |
| Milestone Environmental Services (Orla Slurry and Landfill Facility) | Orla, TX, USA | |2025| |
| Milestone Environmental Services | Pecos, TX, USA | |2020| |
| Miller Environmental Corporation (Manitoba Environmental Centre) | St. Jean Baptiste, MB, Canada | |2023| |2018| |
| Miller Environmental Corporation (Monarch Environmental) | Woodstown, NJ, USA | |2015| |2008| |
| Miller Environmental Group (Environmental Products & Services of Vermont; EPSVT) | Syracuse, NY, USA | |2022| |2016| |2008| |
| Miller Environmental Services (Environmental Products & Services of Vermont) | Lancaster, NY, USA | |2025| |2020| |
| Miller Environmental Services (Water Works; Conklin Services & Construction Inc.) | Newburgh, NY, USA | |2025| |
| Minas Tambores | Sarzedo, Minas Gerais, Brazil | |2023| |
| Minemet (Pty) Ltd. | Canelands, Kwazulu-Natal, South Africa | |2022| |
| Minerva Enterprises, LLC | Waynesburg, OH, USA | |2024| |2021| |2018| |2017| |2010| |
| Mirec NV (Sims Recycling Solutions) | Sint-Niklaas, Flanders, Belgium | |2024| |2012| |
| Mitchell Container Services, Inc. | Saraland, AL, USA | |2000| |
| MKC Enterprises | Doraville, GA, USA | |2007| |
| Mo-BRUK S.A. | Skarbimierz, Opole, Poland | |2022| |
| Modern Asia Environmental Holdings Pte. Ltd. (Technochem Environmental Complex) | Tuas, Singapore | |2023| |2020| |2018| |
| Modern Landfill | Model City, NY, USA | |2024| |2019| |2010| |2004| |
| Multimetco | Anniston, AL, USA | |2010| |2005| |2002| |
| Mumbai Waste Management Ltd. (Ramky-Mumbai Waste Management; MWML) | Taloja, Maharashtra, India | |2024| |2013| |
| Murphy`s Waste Oil Service | Woburn, MA, USA | |2022| |2019| |2005| |
| MXI Environmental Services (Latex Facility) | Abingdon, VA, USA | |2024| |2019| |
| Mytum & Selby Hull Ltd. | Kingston upon Hull, Yorkshire, United Kingdom (England) | |2024| |
| Noranda Recycling, Inc. (Micro Metallics Corporation) | East Providence, RI, USA | |2003| |
| Pure Earth Recycling (Mid-Atlantic Recycling Technologies, Inc.) | Vineland, NJ, USA | |2010| |2006| |
| QualaWash Holdings (Manfredi Special Services) | Cleveland, OH, USA | |2016| |2012| |
| Republic Harland Sanitary LF (Manistee County Landfill; Shoreline Waste Services) | Manistee, MI, USA | |2017| |2007| |
| Republic High Plains Landfill (MT Waste Systems Inc.) | Floweree, MT, USA | |2021| |
| Sims Recycling Solutions (Mirec BV) | Eindhoven, North Brabant, Netherlands | |2012| |
| Skye Metal Recovery, Inc. (METPro Recovery) | Marietta, OH, USA | |2020| |2016| |
| Solumet Metal and Powder, Inc. (Metaux Et Poudres Solumet) | Varennes, QC, Canada | |2023| |2011| |
| Southwest Land and Marine (Makers Oil Corporation) | Corpus Christi, TX, USA | |2016| |
| Stablex Canada, Inc. (Marsulex Inc.) | Blainville, QC, Canada | |2024| |2023| |2021| |2018| |2017| |2015| |2014| |2013| |2012| |2010| |2008| |2007| |2005| |2003| |2002| |2000| |
| The Kiesel Company (Marine Service Facility) | St. Louis, MO, USA | |2025| |
| Triumvirate Environmental (Merrimack; Jones Environmental; Envirosafe) | Lowell, MA, USA | |2024| |2021| |2017| |2012| |2005| |
| Valicor Environmental Services (Midstate Environmental Services) | Hutchins, TX, USA | |2025| |
| Veolia ES Technical Solutions (Marisol, Inc.) | Middlesex, NJ, USA | |2025| |2024| |2023| |2022| |2021| |2020| |2019| |2018| |2017| |2016| |2015| |2014| |2013| |2012| |2011| |2010| |2008| |2007| |2005| |2003| |2002| |1999| |1997| |
| Waste Management LampTracker (Mercury Waste Solutions, Inc) | Roseville, MN, USA | |2009| |2006| |
| WM Mercury Waste, Inc. (Mercury Waste Solutions) | Union Grove, WI, USA | |2020| |2019| |2018| |2017| |2016| |2015| |2014| |2013| |2012| |2011| |2010| |2008| |2006| |2005| |2004| |2003| |2002| |