Clean Harbors to Participate in Upcoming Investor Conferences

Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today announced that senior management will present at the following investor conferences:

CJS Securities Annual New Ideas for the New Year Date: January 14, 2025 Time: 8:45 a.m. ET

27th Annual Needham Growth Conference Date: January 15, 2025 Time: 11:45 a.m. ET

Clean Harbors will webcast the live events; 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 and industrial services. The Company serves a diverse customer base, including a majority of Fortune 500 companies. Its customer base spans a number of industries, including chemical, energy and manufacturing, 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 in the United States, Canada, Mexico, Puerto Rico and India. For more information, visit www.cleanharbors.com.

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Eric J. Dugas EVP and Chief Financial Officer Clean Harbors, Inc. 781.792.5100 [e-mail] Jim Buckley SVP Investor Relations Clean Harbors, Inc. 781.792.5100 [e-mail]