Clean Harbors, Inc. (“Clean Harbors”) (NYSE: CLH), the leading provider of environmental and industrial services throughout North America, today published its 2025 Sustainability Supplement, which provides annual data related to its 2024 environmental, social and governance efforts and an update on progress toward its sustainability goals. Clean Harbors recycled 1.9 million metric tons of materials in 2024, accomplishing its recycling goal far in advance of its 2030 target date.

“Clean Harbors continues to provide our customers with environmentally responsible and sustainable solutions for today’s rapidly changing world,” said Eric Gerstenberg, Co-Chief Executive Officer. “In 2024, we recycled more materials than ever before, satisfying Our Environment goal to increase our overall recycling 25% on a combined basis from our 2019 baseline. We achieved this milestone well in advance of 2030 because of the quality of our industry-leading team, our commitment to innovation, and the considerable investments we’ve made in our technologically advanced recycling capabilities.”

The 2025 supplemental report, which is available at www.cleanharbors.com/about-us/sustainability, highlights the suite of sustainable solutions Clean Harbors offers its customers as well as its own sustainability efforts to reduce the environmental footprint of its operations.

“We have been solving complex environmental challenges for more than 45 years, and it is part of our corporate identity,” said Mike Battles, Co-Chief Executive Officer. “We’ve built a business model where environmental responsibility and financial performance go hand in hand. In 2024, we delivered record results while expanding our capabilities to meet growing demand for sustainable solutions. From advanced recycling to PFAS destruction, we’re helping customers improve their environmental stewardship while driving long-term value for all stakeholders.”

Everywhere industry meets the environment, Clean Harbors is there. In 2024, the Company avoided more than twice the greenhouse gas (GHG) generated from operations for a fifth consecutive year, eliminating four million metric tons of GHG. The Company managed nearly 400 million combined gallons of used oil, solvents and wastewater for its customers, and responded to more than 20,000 emergency customer events, all while achieving its best performance in safety coupled with record financial success.

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, manufacturing and refining, 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 a leading provider of parts washers and environmental services to commercial, industrial and automotive customers, as well as North America’s largest re-refiner and recycler of used oil. 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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