Clean Harbors to Present at the 21st Annual Needham Growth Conference

Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental, energy and industrial services throughout North America, today announced that EVP and Chief Financial Officer Michael L. Battles, EVP Corporate Planning and Development Brian P. Weber and SVP Investor Relations Jim Buckley will be presenting at Needham’s 21st Annual Growth Conference in New York City.

Clean Harbors’ presentation will take place at 2:50 p.m. ET on Wednesday, January 16, 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 (NYSE: CLH) is North America’s leading provider of environmental, energy and industrial services. The Company serves a diverse customer base, including a majority of the Fortune 500, across the chemical, energy, manufacturing and additional markets, as well as numerous government agencies. These customers rely on Clean Harbors to deliver a broad range of services such as end-to-end hazardous waste management, emergency spill response, industrial cleaning and maintenance, and recycling services. Through its Safety-Kleen subsidiary, Clean Harbors also is North America’s largest re-refiner and recycler of used oil and a leading provider of parts washers and environmental services to commercial, industrial and automotive customers. Founded in 1980 and based in Massachusetts, Clean Harbors operates throughout the United States, Canada, Mexico and Puerto Rico. For more information, visit www.cleanharbors.com.

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Michael L. BattlesEVP and Chief Financial OfficerClean Harbors, [e-mail] BuckleySVP Investor RelationsClean Harbors, [e-mail]