Clean Harbors, Inc
Clean Harbors is a U.S.-based environmental and industrial services company focused on collecting, treating, recycling, and disposing of hazardous and non-hazardous waste across North America. It also operates a large used-oil re-refining and parts-cleaning business through its Safety-Kleen Sustainability Solutions segment. The company’s asset base includes incinerators, landfills, TSDFs, wastewater treatment facilities, solvent recycling centers, and field-service capabilities for emergency response and industrial cleaning. Its business model is built around regulated waste handling, recurring service relationships, and specialized infrastructure that is difficult to replicate. Clean Harbors positions itself as a sustainability-oriented service provider for customers that need compliant waste management and environmental remediation solutions.
Fiscal year 2025 · change from previous year
Development 2020–2025
Business
Share of revenueCollection, transport, treatment, recycling, disposal, emergency response, and industrial cleaning services.
Used-oil re-refining, recycled base and blended oil products, lubricants, and related service offerings.
Products
Reported · share of revenue- Technical Services30.8 %
- Industrial Services and Other22.0 %
- Safetly Kleen Environmental Services21.8 %
- Fieldand Emergency Response15.5 %
- Safety Kleen Oil9.8 %
Source: 10-K FY2025, revenue the company reports per product line (SEC XBRL). Shares are of the lines shown and add up to 100 %.
Customers
Clean Harbors serves a broad base of industrial, commercial, and government customers that need compliant handling of hazardous materials and environmental services. Its customer list includes chemical and manufacturing companies, automotive and general manufacturing sites, fleet operators, distributors, oil-product manufacturers, and industrial plants. The company also serves numerous government agencies and says it works with the majority of Fortune 500 companies. Customers buy from Clean Harbors because the services are regulated, operationally complex, and tied to liability management, safety, and sustainability goals. In many cases, customers rely on the company for recurring waste streams, emergency cleanup, and specialized on-site services that require permits, facilities, and technical expertise.
Buy hazardous waste management, industrial cleaning, maintenance, and remediation services to meet regulatory and safety requirements.
Buy parts washer services, vacuum services, recycled base oil, and lubricants for recurring plant and fleet operations.
Buy emergency response, cleanup, and disposal services for incidents and environmental projects.
Buy containerized waste collection and related environmental services for smaller, recurring waste streams.
Strategy
Clean Harbors is investing to expand and modernize its regulated disposal and recycling network, with capital directed toward projects such as the Phoenix hub, an SDA unit, and fleet growth. These investments are intended to increase long-term capacity, improve service coverage, and strengthen the company’s position in high-barrier environmental markets. The company also continues to integrate acquisitions, including HEPACO and the planned acquisition of certain Depot Connect International environmental businesses, to broaden service capabilities and customer reach. Its strategy is closely tied to sustainability demand, PFAS-related work, industrial reshoring, and the need for reliable hazardous waste infrastructure. Because the business depends on scarce permitted assets, adding capacity and expanding route density can improve utilization and pricing power over time.
More permitted capacity supports pricing, utilization, and long-term growth in regulated waste markets.
Acquisitions add customer relationships, service routes, and specialized capabilities faster than organic buildout.
PFAS regulation and large-scale cleanup needs create specialized demand for testing, filtration, and disposal.
Geography
Q1/2026Clean Harbors generates essentially all of its business in North America, with operations and facilities concentrated in the United States and Canada. The company describes itself as the largest provider of hazardous waste incineration, landfill, and TSDF capacity in North America, which makes geography important because service economics depend on facility location, transport distance, and local permitting. Its field-service and emergency-response work is tied to industrial activity, weather events, and regional regulatory conditions across the U.S. and Canada. The company also notes foreign currency fluctuations as a factor, indicating some cross-border exposure, but the business remains overwhelmingly North America-centric. Because the asset network is fixed and regulated, local capacity and regional demand directly affect pricing, utilization, and competitive position.
Share of the revenue the company reports by geography.
Risks
Clean Harbors faces operational and safety risk because it handles hazardous materials and operates facilities where equipment failure, spills, or accidents can create liability, shutdowns, and reputational damage. Regulatory risk is central to the model: changes in environmental laws, PFAS rules, or permit requirements can force additional capital spending or alter demand for its services. The company is also exposed to industrial activity, pricing pressure, and capacity cycles, since waste volumes and disposal economics depend on manufacturing output and available incineration capacity. Its business is vulnerable to weather events, natural disasters, and emergency-response volatility, which can both disrupt operations and create short-term spikes in demand. Cybersecurity, acquisition integration, and environmental liability assumptions are additional risks because the company relies on complex systems, acquired assets, and long-dated remediation obligations.
- Operational and safety incidentsImpact: HighLikelihood: Medium
The company transports, treats, and disposes of hazardous materials, so equipment failures or accidents can cause pollution, injury, shutdowns, and legal claims.
Exposure - Environmental regulation and PFAS rule changesImpact: HighLikelihood: Medium
The business depends on permits and regulated waste demand; new rules can require additional capital or change service economics.
Exposure - Industrial demand and pricing cyclesImpact: MediumLikelihood: High
Waste volumes and industrial cleaning demand track North American industrial activity and manufacturing output.
Exposure: Environmental Services and Safety-Kleen
- Cybersecurity and technology disruptionImpact: MediumLikelihood: Medium
Operational systems and third-party payment processing are critical to service delivery and business continuity.
Exposure - Environmental liability estimatesImpact: MediumLikelihood: Low
The company carries long-dated remediation and closure obligations that may change with new evidence or regulation.
Exposure: Acquired sites and regulated facilities
Accounting
Judgemental itemsManagement must estimate long-dated cleanup and closure costs, and changes in assumptions can move earnings materially.
Impact: Can affect operating income, cash flow expectations, and balance-sheet liabilities
The company posts standby letters of credit to secure closure and post-closure obligations at hazardous waste facilities.
Impact: Affects liquidity and available borrowing capacity
Recent acquisitions and planned deals can create goodwill and intangible assets that may later require impairment testing.
Impact: Can affect reported assets and future impairment charges
Emergency response, weather events, industrial activity, and commodity-linked oil products can create uneven quarterly results.
Impact: Affects comparability of revenue and margins across periods
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Last updated: 24/09/2026