EX-21 3 clh-12312024ex21xclhsubsid.htm EX-21
Exhibit 21
Subsidiaries of Clean Harbors, Inc.

Subsidiary | Jurisdiction of Organization
Ace/Allwaste Environmental Services of Indiana, LLC | Illinois
Altair Disposal Services, LLC | Delaware
American Industrial Assurance Company | South Carolina
Aquilex Finance LLC | Delaware
Aquilex Intermediate Corporate Holdings LLC | Delaware
Aquilex Intermediate Holdings LLC | Delaware
Aquilex LLC | Delaware
Baton Rouge Disposal, LLC | Delaware
Bridgeport Disposal, LLC | Delaware
CARBER Holdings, Inc. | Delaware
CB Canada Acquisition, Inc.* | Ontario
CB Canada Holdings, Inc.* | Ontario
CB US Holdings, Inc. | 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 LP* | Alberta
Clean Harbors Exploration Services, Inc. | Nevada
Clean Harbors Exploration Services, ULC* | Alberta
Clean Harbors Florida, LLC | Delaware
Clean Harbors Grassy Mountain, LLC | Delaware
Clean Harbors India LLP* | India

Exhibit 21

Subsidiary | Jurisdiction of Organization
Clean Harbors Industrial Services Canada, Inc.* | Alberta
Clean Harbors Innu Environmental Services, Inc.* | Newfoundland
Clean Harbors Kansas, LLC | Delaware
Clean Harbors Kimball Realty, 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. (DE Corp.) | Delaware
Clean Harbors of Braintree, Inc. | Massachusetts
Clean Harbors of Connecticut, Inc. (DE) | 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 Partnership* | Alberta
Clean Harbors Surface Rentals USA, Inc. | Delaware
Clean Harbors Surface Rentals, ULC* | Alberta
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
Clean Harbors, Inc. | Massachusetts
Confined Space Services L.L.C. | Michigan
Cousins Waste Control, LLC | Ohio
Crowley Disposal, LLC | Delaware
Cyn Oil Corporation | Massachusetts
Debusk Industrial Services Company LLC | Texas
Dene Nation Industrial Services LTD.* | Alberta
DFW Waste Oil Service, Inc. | Texas
Disposal Properties, LLC | Delaware
Emerald Services, Inc. | Washington
Emergency Response and Training Solutions, LLC | Delaware
Environmental Management Alternatives, LLC | Delaware

Exhibit 21

Subsidiary | Jurisdiction of Organization
Environmental Management Specialists, LLC | Delaware
EnviroSORT Inc.* | Alberta
Global Vapor Control, Inc. | Texas
Green View Technologies, Inc. | New Hampshire
GSX Disposal, LLC | Delaware
Hepaco Blocker, Inc. | Delaware
Hepaco GC, LLC | Delaware
Hepaco Holding, LLC | Delaware
Hepaco, LLC | Delaware
Hilliard Disposal, LLC | Delaware
HPC Industrial Group, LLC | Delaware
HPC Industrial Services, LLC | Delaware
HPC PetroServ, Inc. | Texas
HydroChem Canada ULC* | Alberta
IISG Central Region LLC | Delaware
IISG Gulf Coast LLC | Delaware
IISG Real Estate LLC | Michigan
Industrial Service Oil Company, Inc. | California
Inland Industrial Services Group LLC | Michigan
Inland Waters of Ohio LLC | Michigan
Inland Waters Pollution Control Services LLC | Michigan
Jesco Industrial Service, LLC | Kentucky
Laidlaw Environmental Services de Mexico S.A. de C.V.* | Mexico
LJ Energy Services Intermediate Holding Corp. | Delaware
Lonestar Sylvan Inc.* | Federally Chartered
Lonestar Vacuum Inc.* | Alberta
Lonestar West Enterprises LLC | Oklahoma
Lonestar West Inc.* | Federally Chartered
Lonestar West Services LLC | Nevada
Murphy's Waste Oil Service, Inc. | Massachusetts
Noble Oil Services, Inc. | North Carolina
Northeast Casualty Insurance Company | Vermont
NTS, LLC | North Carolina
Omnichem, LLC | Michigan
Philip Services/North Central, LLC | Iowa
Plaquemine Remediation Services, LLC | Delaware
PMS Industrial Services, LLC | Michigan
Power Vac Construction L.L.C. | Michigan
PSC Industrial Holdings Corp. | Delaware
PSC Industrial Outsourcing of Michigan, LLC | Ohio
PSC Industrial Outsourcing, LP | Delaware
PSC Industrial, Inc. | Delaware
PSC LDAR Services, LLC | Delaware
Ricky's Oil & Environmental Services, LLC | Florida

Exhibit 21

Subsidiary | Jurisdiction of Organization
RMF Aquilex Corp. | Delaware
Roebuck Disposal, LLC | Delaware
Rosemead Oil Products, Inc. | California
Safety-Kleen Canada Inc.* | New Brunswick
Safety-Kleen Envirosystems Company | California
Safety-Kleen Envirosystems Company of Puerto Rico, Inc. | Indiana
Safety-Kleen International, Inc. | Delaware
Safety-Kleen of California, Inc. | California
Safety-Kleen Systems, Inc. | Wisconsin
Safety-Kleen, Inc. | Delaware
Sawyer Disposal Services, LLC | Delaware
Seaport Environmental, LLC | Delaware
Service Chemical, LLC | Delaware
SK D'Incineration Inc.* | Quebec
Speed Industrial Corporate, LLC | Louisiana
Speed Industrial Service Catalyst LLC | Delaware
Speed Industrial Service of Beaumont, LLC | Louisiana
Speed Industrial Service, LLC | Louisiana
Speed Industrial Services of Lake Charles LLC | Louisiana
Speed Industrial Services of Louisiana, LLC | Louisiana
Speed Industrial Services of Texas, LLC | Louisiana
Spring Grove Resource Recovery, Inc. | Delaware
Synergy Hydrocarbon Recovery, LLC | Florida
Synergy Recycling of Central Florida, LLC | Georgia
Synergy Recycling, LLC | Florida
The Solvents Recovery Service of New Jersey, Inc. | New Jersey
Thermo Fluids Inc. | Delaware
Thompson Industrial Services, LLC | North Carolina
Tri-vax Enterprises Ltd.* | Alberta
Tulsa Disposal, LLC | Delaware
Versant Energy Services, Inc. | Delaware
Versant Energy Services, LP* | Alberta
Vulsay Industries Ltd.* | Ontario

*Foreign entity or subsidiary of foreign entity