Clean Harbors, Inc., headquartered in Norwell, Massachusetts, is a provider of waste management and industrial services for commercial customers, specializing in the collection, transportation, treatment and disposal of hazardous waste, but also offering services for non-hazardous waste. The company has 870 operating locations in 630 properties in the U.S. and Canada including a network of over 100 waste disposal facilities such as incinerators, landfills, treatment, storage and disposal facilities. It also owns Safety-Kleen, the largest re-refiner and recycler of used oil in North America. In 2024, the company received 91% of its revenues in the United States and 9% of its revenues in Canada. In 2024, the company's revenues primarily came from the following industries: chemical industry, manufacturing, refineries, automotive industry, utilities, base and blended oils, oil and gas industry, transportation, government and retail. The company is ranked 586th on the Fortune 500. Wikipedia