EX-21 2 clh12312018ex21.htm EXHIBIT 21
Exhibit 21
Subsidiaries of Clean Harbors, Inc.

Subsidiary | Jurisdiction of Organization
Altair Disposal Services, LLC | Delaware
Baton Rouge Disposal, LLC | Delaware
BCT Structures, ULC* | Alberta
Bridgeport Disposal, LLC | Delaware
Cat Tech International, Ltd.* | Bahamas
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 Directional Boring Services, ULC* | Alberta
Clean Harbors Directional Boring Services LP* | Alberta
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 ES Industrial Services, Inc. | Delaware
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

Exhibit 21

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
CTVI Inc.* | Virgin Islands
Cyn Oil Corporation | Massachusetts
Disposal Properties, LLC | Delaware
Emerald Services, Inc. | Washington
EnviroSORT Inc. | Alberta
Grizzco Camp Services, ULC* | British Columbia
GSX Disposal, LLC | Delaware
Hilliard Disposal, LLC | Delaware
Industrial Service Oil Company, Inc. | California
JL Filtration Inc.* | Alberta
JL Filtration Operating Limited Partnership* | Alberta
Laidlaw Environmental Services de Mexico S.A. de C.V.* | Mexico
Lonestar Sylvan Inc.* | Canada
Lonestar Vacuum Inc.* | Alberta
Lonestar West Enterprises LLC | Oklahoma

Exhibit 21

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 International Asia Investment Company Limited* | Hong Kong
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
Veolia ES Industrial Services, Inc. | Delaware
Versant Energy Services, Inc. | Delaware
Versant Energy Services, LP* | Alberta
Vulsay Industries Ltd.* | Ontario

*Foreign entity or subsidiary of foreign entity