CLEAN HARBORS INC

Overview

Clean Harbors Inc. is an environmental and industrial services company focused on managing hazardous waste and materials, industrial cleaning and maintenance, and environmental cleanup and spill response. Its Safety-Kleen business also collects and re-refines used oil into base oils, lubricants and related products.[1]+2

The company operates primarily across North America, with facilities and services in the United States, Canada, Mexico and Puerto Rico.[4] Its stated mission is “to create a cleaner and safer environment.” [5] Clean Harbors reported 2025 consolidated revenue of approximately $6.031 billion and describes its workforce as more than 25,000 employees.[6][7] [1]+9

Products & services

Clean Harbors’ Technical Services include hazardous- and non-hazardous-waste profiling, collection, packaging, transportation, recycling, treatment and disposal, as well as onsite environmental management and remediation. Its disposal and treatment capabilities include incinerators, landfills and treatment, storage and disposal facilities; the company also provides containerized waste services and PFAS management.[9]+2 Industrial Services cover in-plant cleaning and maintenance, plant outages and turnarounds, chemical cleaning and pigging, high- and ultra-high-pressure water cleaning, leak detection and repair, daylighting, and production and upstream energy services.[12]

Field and Emergency Response offerings include confined-space tank cleaning, decontamination and remediation, railcar cleaning, manhole and vault clean-outs, product recovery and transfer, vacuum and filtration, water treatment, wetland restoration, and spill cleanup. Safety-Kleen branch services include containerized waste handling, parts-washer service—with equipment, maintenance and cleaning-fluid replacement—and vacuum service; the company also sells packaged blended-oil products.[13]+2 Through Safety-Kleen Sustainability Solutions, Clean Harbors collects used oil, filters and other automotive fluids and processes used oil into recycled base and blended oils, vacuum gas oil, hydraulic oils, lubricants and recycled fuel oil. It also sells automotive and industrial lubricants and bulk automotive fluids.[15]+2

At its Lambton facility, the company describes high-temperature incineration above 1,300°C (2,372°F).[18] In H1 2026, reported consolidated revenue comprised $2,680.289 million in services and $514.253 million in products, approximately 83.9% and 16.1% of total revenue, respectively (calculated from reported figures).[19] [9]+12

Geographic presence

At year-end 2025, Clean Harbors reported approximately 860 operating locations on about 620 properties across all 50 U.S. states, eight Canadian provinces, Puerto Rico and Mexico. Its network also included approximately 580 service centers, branches and satellite locations across the United States and Canada.[20][21]

For 2025, third-party revenue was approximately $5.491 billion in the United States (about 91% of total) and $540 million in Canada (about 9%). These are the principal geographic markets reported; state-level revenue shares were not provided.[22]

The company’s principal executive offices are in Norwell, Massachusetts, and it also has regional administrative offices in Canada and India. It reported 22,155 active full-time employees, but the geographic distribution of its workforce was not specified.[23][24] [20]+6

Business segments

Clean Harbors reports two operating segments in its 2025 annual reporting: Environmental Services and Safety-Kleen Sustainability Solutions (SKSS). Environmental Services covers collection, transportation, treatment, recycling and disposal of hazardous and non-hazardous waste, as well as emergency response, PFAS services, industrial maintenance and specialty industrial services. It generated approximately 85% of 2025 consolidated revenue, based on third-party revenue.[25]+2

SKSS collects used oil, oil filters and automotive fluids, then re-refines or recycles them into products including base oil, vacuum gas oil and lubricants. It contributed approximately 15% of 2025 consolidated revenue on the same basis. Corporate activity is shown separately in the revenue reconciliation, rather than as one of the two operating segments.[25]+2 [25]+4

Company history

Clean Harbors was founded in 1980 by Alan S. McKim as a four-person tank-cleaning business and went public in 1987. It expanded into waste treatment with its 1989 acquisition of Chem Clear, then broadened its waste-management network through the 2002 acquisition of Safety-Kleen’s Chemical Services Division. Acquisitions of Teris in 2007 and Eveready in 2009 further extended its services and reach.[27]+3

A pivotal expansion came in 2012, when Clean Harbors completed its acquisition of Safety-Kleen. The company continued to grow its industrial-services operations, acquiring Veolia’s U.S. Industrial Cleaning Division in 2018 and HydroChemPSC in 2021. In 2023, founder Alan McKim stepped down as CEO and became Executive Chairman and CTO, with longtime executives Michael Battles and Eric Gerstenberg named co-CEOs. Clean Harbors acquired HEPACO in 2024; in 2026, McKim announced his planned retirement from the board and CTO role, and Robert Willett was appointed board chair.[31]+6 [27]+10

Sources

• CLEAN HARBORS INC — Full financial report (2025 Y)
  15 citations

  [1][2][3][5][6][8][16][17][20][21][22][23][24][25][26]
• www.cleanharbors.com[4]
• careersin.cleanharbors.com[7]
• CLEAN HARBORS INC — Full financial report (2026 Q 2)
  8 citations

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• www.cleanharbors.com[18]
• www.cleanharbors.com[27]
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• ir.cleanharbors.com[30]
• ir.cleanharbors.com[31]
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