| Facility Name (Alias/Former Names) | City, State, Country | Program Years |
| Chemical Waste Management (Kettleman Hills Facility) | Kettleman City, CA, USA | |2024| |2023| |2021| |2020| |2019| |2018| |2016| |2015| |2014| |2012| |2011| |2010| |2009| |2008| |2007| |2006| |2005| |2004| |2002| |2001| |2000| |1998| |1995| |
| Crystal Clean (Kansas City Hub) | Kansas City, KS, USA | |2020| |
| Eastern Organic Fertilizer Pvt. Ltd. (K.M.C Compost Plant) | Kolkata, West Bengal, India | |2024| |
| Energigjenvinningsetaten (EGE) (Klemetsrud Energy Recovery Plant) | Oslo, Oslo, Norway | |2010| |
| Grundon Waste Management Ltd (Knowl Hill Hydroclave) | Maidenhead, Berkshire, United Kingdom (England) | |2011| |
| K. B. Recycling (Canby Disposal) | Canby, OR, USA | |2012| |
| Kahyaogullari Hurda San. Tic. Ltd. Sti. | Tuzla, Istanbul, Turkey | |2017| |
| Kalumetals, Inc. | Derry, PA, USA | |2008| |
| Kanay S.A.C. (Kanay Seche Group) | El Salvador, Lima, Peru | |2025| |2019| |
| Karnataka Waste Management Project (KWMP; Ramky Enviro Engineers) | Dabaspete, Karnataka, India | |2025| |
| KarRecycle Center LLP | Bangalore, Karnataka, India | |2023| |
| Kearny Steel Container | Newark, NJ, USA | |2016| |
| Kekaha Landfill | Kekaha, HI, USA | |2017| |
| Keystone Cement Company (Giant Cement) | Bath, PA, USA | |2025| |2021| |2018| |2016| |2012| |2011| |2009| |2005| |2003| |2002| |1997| |
| KilnDirect Materials Recovery Facility (Sumter Transport) | Sumter, SC, USA | |2023| |2019| |
| Kimia Zue Huat Sdn. Bhd. | Bukit Mertajam, Penang, Malaysia | |2020| |
| Kinsbursky Brothers Supply, Inc. | Anaheim, CA, USA | |2025| |2024| |2023| |2022| |2021| |2020| |2019| |2018| |2017| |2016| |2015| |2014| |2013| |2012| |2011| |2010| |2009| |2007| |2006| |2004| |2003| |2001| |1998| |
| Kissack Water & Oil Service, Inc. (Kuehne Disposal Site) | Rozet, WY, USA | |2021| |
| Kitzinger Cooperage Corporation | St. Francis, WI, USA | |2008| |
| Kleensoil International | Palmetto, FL, USA | |2003| |
| Klinash, S.A. de C.V. | Lerma, Mexico, Mexico | |2023| |2019| |
| KMK Metals Recycling | Tullamore, County Offaly, Ireland | |2025| |2020| |2017| |2013| |
| KmX Corporation | New Church, VA, USA | |2005| |
| Koppers Recovery Resources (Muncy Cogeneration Plant) | Montgomery, PA, USA | |2008| |
| K-Pure Waterworks | Rancho Cucamonga, CA, USA | |2018| |
| Krause & Managan C&D Landfill | Sulphur, LA, USA | |2018| |
| KT Enterprises 34-22 SFI | Watford City, ND, USA | |2023| |
| Kualiti Alam Sdn Bhd | Port Dickson, Negeri Sembilan, Malaysia | |2023| |2021| |2020| |2018| |2016| |2015| |2013| |2010| |2007| |2004| |
| Kunshan Liqun Solid Waste Management Co. Ltd. | Kunshan, Jiangsu Province, China | |2007| |
| Nicrometal (Kompania recyklingowa) | Torun, Kujawsko-Pomorskie, Poland | |2010| |
| Trienekens (Sarawak) Sdn Bhd (Kuching Integrated Waste Management Park) | Kuching, Sarawak, Malaysia | |2018| |2013| |
| Veolia Environmental Services (Kilburn Liquid Treatment Plant; Collex Pty Ltd) | Kilburn, South Australia, Australia | |2022| |2013| |
