Clean Harbors, Inc. (?Clean Harbors?) (NYSE: CLH), the leading provider of environmental, energy and industrial services and hazardous waste management services throughout North America, today announced that Chairman and Chief Executive Officer Alan S. McKim and Chief Financial Officer James M. Rutledge will be presenting at Needham & Company, LLC's 13th Annual Growth Conference on Tuesday, January 11, 2011 at 4:10 p.m. (ET).

Investors can hear the live webcast of the Clean Harbors' presentation on the ?Investor Relations? portion of the Company's website at www.cleanharbors.com. The presentation will also be archived on the website.

About Clean Harbors

Clean Harbors is the leading provider of environmental, energy and industrial services and hazardous waste management services throughout North America. The Company serves over 50,000 customers, including a majority of the Fortune 500 companies, thousands of smaller private entities and numerous federal, state, provincial and local governmental agencies. Headquartered in Norwell, Massachusetts, Clean Harbors has more than 175 locations, including over 50 waste management facilities, throughout North America in 36 U.S. states, seven Canadian provinces, Mexico and Puerto Rico. The Company also operates international locations in Bulgaria, China, Singapore, Sweden, Thailand and the United Kingdom. For more information, visit www.cleanharbors.com.

Clean Harbors, Inc.
James M. Rutledge, 781-792-5100
EVP and Chief Financial Officer
InvestorRelations@cleanharbors.com
or
Clean Harbors, Inc.
Bill Geary, 781-792-5130
Public Affairs Counsel
or
Sharon Merrill Associates, Inc.
Jim Buckley, 617-542-5300
Executive Vice President
clh@investorrelations.com