What Clean Harbors reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.
Our principal executive offices are in Norwell, Massachusetts. We own our primary executive office building in Massachusetts, which occupies 104,000 square feet. We also currently lease 59,300 square feet of additional office space in Norwell, Massachusetts, under arrangements that do not expire until 2042. We have regional administrative offices in Canada and India. Our properties are sufficient and suitable for our current needs.
We have approximately 860 operating locations sited across at approximately 620 properties or parcels covering all 50 U.S. states, eight Canadian provinces, Puerto Rico and Mexico. These operating locations include service centers, branches, satellite locations, active hazardous waste management properties and oil processing, blending and packaging facilities. Many of our properties offer multiple capabilities. The following sets forth certain information regarding our key properties as of December 31, 2025.
The rest of Item 2
Service Centers, Branches and Satellite Locations
We have approximately 580 service centers, branches and satellite locations, across approximately 450 properties or parcels throughout the United States and Canada. These serve as principal sales and service centers from which we provide our environmental, industrial and Safety-Kleen branch core services for our Environmental Services business, as well as oil collection and product sales locations for our Safety-Kleen Sustainability Solutions business.
Active Hazardous Waste Management Properties
Incinerator Facilities. We own and operate an integrated network of ten incinerators located at five incinerator facility locations. The complementary capabilities of these facilities allow us to manage waste across our network with a focus on waste-handling compliance, transportation efficiency and overall incinerator utilization. The network’s annual practical capacity is 631,721 tons.
Practical capacity reflects the production level at which our incinerators can operate efficiently and sustainably. It is not based on continuous 24-hour, seven-day operations but instead takes into account factors such as long-term customer demand, staffing levels, shift structures, holidays, scheduled maintenance and mix of the waste processed. Utilization is calculated by dividing actual production tons by practical capacity at each incinerator.
For the year ended December 31, 2025, total utilization was 85.0%. Excluding the new incinerator at Kimball, Nebraska, which is still ramping up, utilization across the remaining incinerators was 89% for the full year. The Kimball incinerator, which commenced operations in late 2024, is not expected to reach full utilization until the end of 2026.
Our incinerators offer a wide range of technological capabilities to customers through this network. In the United States, we provide incineration through one fluidized bed thermal oxidation unit and four solids and liquids-capable incinerator facilities, and we operate one active hazardous waste liquid injection incinerator in Canada.
Commercial and Non-Commercial Landfills. In the United States and Canada, we operate seven commercial landfills with approximately 36.1 million cubic yards of remaining highly probable airspace. Six of our commercial landfills are designed and permitted for the disposal of hazardous waste and one landfill is operated for non-hazardous industrial waste disposal and, to a lesser extent, municipal solid waste. In addition to our commercial landfills, we also own and operate one
non-commercial landfill that only accepts waste from our on-site incinerator. See “Landfill Accounting” within Note 2, “Significant Accounting Policies,” to our consolidated financial statements included in Item 8 of this Annual Report on Form 10-K for additional information on our commercial and non-commercial landfills.
Wastewater Treatment Facilities. We operate a total of 12 facilities, of which 10 are owned and two are leased, that offer a range of wastewater treatment technologies and services. Wastewater treatment consists primarily of three types of services: hazardous wastewater treatment, sludge dewatering or drying and non-hazardous wastewater treatment.
Treatment, Storage and Disposal Facilities. We operate 33 TSDFs in the United States and Canada, of which 30 are owned and three are leased. Our TSDFs facilitate the treatment and movement of materials among our network of service centers and treatment and disposal facilities. Transportation may be accomplished by truck, rail, barge or a combination of modes, with our own assets or in conjunction with third-party transporters. Specially designed containment systems, vehicles and other equipment permitted for waste transport, together with drivers trained in transportation and waste handling procedures, provide for the movement of customer waste streams.
Other Hazardous Waste Management Properties. We also operate nine facilities specializing in solvent recovery, of which seven are owned and two are leased, and we own and operate two autoclave facilities specifically designed to treat medical waste.
Oil Processing, Blending and Packaging Facilities
Oil Terminals. We operate a total of 88 oil terminals, of which 54 are owned and 34 are leased, which collect or process used oil prior to delivery to our re-refineries or distribution as recycled fuel oil.
Oil Recycling and Re-refining Facilities. We own eight oil re-refineries, seven in the United States and one in Canada. Currently our re-refineries in Newark, California and Rollinsford, New Hampshire are idled. The remaining re-refineries have sufficient capacity to continue processing our used oil collections into new re-refined oil, lubricants and byproducts.
Oil Packaging and Blending Facilities. We operate a total of four oil packaging and blending facilities, of which three are owned and one is leased.