| Subsidiary | Jurisdiction of Organization | ||||
| Altair Disposal Services, LLC | Delaware | ||||
| Baton Rouge Disposal, LLC | Delaware | ||||
| Bridgeport Disposal, LLC | Delaware | ||||
| CH International Holdings, LLC | Delaware | ||||
| Clean Harbors Andover, LLC | Delaware | ||||
| Clean Harbors Aragonite, LLC | Delaware | ||||
| Clean Harbors Arizona, LLC | Delaware | ||||
| Clean Harbors Baton Rouge, LLC | Delaware | ||||
| Clean Harbors BDT, LLC | Delaware | ||||
| Clean Harbors Buttonwillow, LLC | Delaware | ||||
| Clean Harbors Canada, Inc.* | New Brunswick | ||||
| Clean Harbors Caribe, Inc.* | Puerto Rico | ||||
| Clean Harbors Chattanooga, LLC | Delaware | ||||
| Clean Harbors Clive, LLC | Delaware | ||||
| Clean Harbors Coffeyville, LLC | Delaware | ||||
| Clean Harbors Colfax, LLC | Delaware | ||||
| Clean Harbors Deer Park, LLC | Delaware | ||||
| Clean Harbors Deer Trail, LLC | Delaware | ||||
| Clean Harbors Development, LLC | Delaware | ||||
| Clean Harbors Disposal Services, Inc. | Delaware | ||||
| Clean Harbors El Dorado, LLC | Delaware | ||||
| Clean Harbors Energy and Industrial Services Corp.* | Alberta | ||||
| Clean Harbors Energy and Industrial Services LP* | Alberta | ||||
| Clean Harbors Energy and Industrial Western Ltd.* | Alberta | ||||
| Clean Harbors Energy Services ULC* | Alberta | ||||
| Clean Harbors Environmental Services, Inc. | Massachusetts | ||||
| Clean Harbors Exploration Services, Inc. | Nevada | ||||
| Clean Harbors Exploration Services, ULC* | Alberta | ||||
| Clean Harbors Exploration Services LP* | Alberta | ||||
| Clean Harbors Florida, LLC | Delaware | ||||
| Clean Harbors Grassy Mountain, LLC | Delaware | ||||
| Clean Harbors India LLP* | India | ||||
| Clean Harbors Industrial Services Canada, Inc.* | Alberta | ||||
| Clean Harbors Industrial Services, Inc. | Delaware | ||||
| Clean Harbors Innu Environmental Services, Inc. | Newfoundland | ||||
| Clean Harbors Kansas, LLC | Delaware | ||||
| Clean Harbors Kingston Facility Corporation | Massachusetts | ||||
| Clean Harbors LaPorte, LLC | Delaware | ||||
| Clean Harbors Laurel, LLC | Delaware | ||||
| Clean Harbors Lodging Services LP* | Alberta | ||||
| Clean Harbors Lodging Services, ULC* | Alberta | ||||
| Clean Harbors Lone Mountain, LLC | Delaware | ||||
| Clean Harbors Mercier, Inc. | Quebec | ||||
| Clean Harbors of Baltimore, Inc. | Delaware | ||||
| Clean Harbors of Braintree, Inc. | Massachusetts | ||||
| Clean Harbors of Connecticut, Inc. | Delaware | ||||
| Clean Harbors Pecatonica, LLC | Delaware | ||||
| Clean Harbors Production Services, ULC* | Alberta | ||||
| Clean Harbors Quebec, Inc.* | Quebec | ||||
| Clean Harbors Recycling Services of Chicago, LLC | Delaware | ||||
| Clean Harbors Recycling Services of Ohio LLC | Delaware | ||||
| Clean Harbors Reidsville, LLC | Delaware | ||||
| Clean Harbors San Jose, LLC | Delaware | ||||
| Clean Harbors San Leon, Inc. | Delaware | ||||
| Clean Harbors Services, Inc. | Massachusetts | ||||
| Clean Harbors Surface Rentals, ULC* | Alberta | ||||
| Clean Harbors Surface Rentals Partnership* | Alberta | ||||
| Clean Harbors Surface Rentals USA, Inc. | Delaware | ||||
| Clean Harbors Tennessee, LLC | Delaware | ||||
| Clean Harbors Westmorland, LLC | Delaware | ||||
| Clean Harbors White Castle, LLC | Delaware | ||||
| Clean Harbors Wichita, LLC | Delaware | ||||
| Clean Harbors Wilmington, LLC | Delaware | ||||
| Crowley Disposal, LLC | Delaware | ||||
| Cyn Oil Corporation | Massachusetts | ||||
| Disposal Properties, LLC | Delaware | ||||
| Emerald Services, Inc. | Washington | ||||
| Green View Technologies, Inc. | New Hampshire | ||||
| EnviroSORT Inc. | Alberta | ||||
| Grizzco Camp Services, ULC* | British Columbia | ||||
| GSX Disposal, LLC | Delaware | ||||
| H20 Environmental, Inc. | Nevada | ||||
| Hilliard Disposal, LLC | Delaware | ||||
| Industrial Service Oil Company, Inc. | California | ||||
| Laidlaw Environmental Services de Mexico S.A. de C.V.* | Mexico | ||||
| Lonestar Sylvan Inc.* | Canada | ||||
| Lonestar Vacuum Inc.* | Alberta | ||||
| Lonestar West Enterprises LLC | Oklahoma | ||||
| Lonestar West Inc.* | Canada | ||||
| Lonestar West Services LLC | Nevada | ||||
| Murphy's Waste Oil Service, Inc. | Massachusetts | ||||
| Northeast Casualty Insurance Company | Vermont | ||||
| Plaquemine Remediation Services, LLC | Delaware | ||||
| Rosemead Oil Products, Inc. | California | ||||
| Roebuck Disposal, LLC | Delaware | ||||
| Safety-Kleen de Mexico, S. de R.L. de C.V.* | Mexico | ||||
| Safety-Kleen Canada Inc.* | New Brunswick | ||||
| Safety-Kleen Envirosystems Company | California | ||||
| Safety-Kleen Envirosystems Company of Puerto Rico, Inc. | Indiana | ||||
| Safety-Kleen, Inc. | Delaware | ||||
| Safety-Kleen International, Inc. | Delaware | ||||
| Safety-Kleen of California, Inc. | California | ||||
| Safety-Kleen Systems, Inc. | Wisconsin | ||||
| Sanitherm, ULC* | Alberta | ||||
| Sawyer Disposal Services, LLC | Delaware | ||||
| Service Chemical, LLC | Delaware | ||||
| SK D’Incineration* | Quebec | ||||
| SK Servicios Ambientales Administrativos, S. de R.L. de C.V.* | Mexico | ||||
| Spring Grove Resource Recovery, Inc. | Delaware | ||||
| The Solvents Recovery Service of New Jersey, Inc. | New Jersey | ||||
| Thermo Fluids Inc. | Delaware | ||||
| Tri-vax Enterprises Ltd.* | Alberta | ||||
| Tulsa Disposal, LLC | Delaware | ||||
| Versant Energy Services, Inc. | Delaware | ||||
| Versant Energy Services, LP* | Alberta | ||||
| Vulsay Industries Ltd.* | Ontario | ||||