Clean Harbors to Present at the Raymond James Institutional Investors Conference on March 9

Norwell, MA – March 1, 2011 – Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental, energy and industrial 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 the Raymond James 32nd Annual Institutional Investors Conference in Orlando, Florida.

Clean Harbors’ presentation will take place at 9:15 a.m. (ET) on Wednesday, March 9, and will be webcast live. To access the live or archived webcast, visit the “Investor Relations” portion of Clean Harbors’ website at www.cleanharbors.com.

About Clean Harbors

Clean Harbors is the leading provider of environmental, energy and industrial 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.

Contacts