Clean Harbors, Inc. (CLH) is a Utilities stock trading at $315.20 (as of 2026-09-02), with a market capitalization of $16.66B and a trailing P/E of 42.1. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.
Clean Harbors, Inc. provides environmental and industrial services in North America. It operates through Environmental Services, which manages hazardous and non-hazardous waste through collection, transport, treatment, and disposal (including services for laboratory chemicals and household hazardous waste), and Safety-Kleen Sustainability Solutions, which offers parts washers, cleaning products, and pickup and transportation services for containerized waste.
Understand Clean Harbors, Inc.: how it makes money
Clean Harbors collects, treats, and disposes of industrial waste (incineration, landfill, wastewater, lab chemicals, explosives) and reprocesses waste oil into fuel, billing per-unit fees to manufacturers and municipalities. Environmental Services anchors the revenue base, while Safety-Kleen Sustainability Solutions adds a recurring fuel-blending stream tied to commodity base-oil prices.
The profit engine is volume pushed through a fixed set of permitted disposal facilities (incinerators, landfills); because capacity is the bottleneck, utilization rates and per-unit pricing moves drive earnings far more than customer count.
Business quality (Mixed): A 45.1x P/E against a 27x industry average (69% premium) on just 2% revenue growth and an 8% operating margin leaves little cushion; execution on PFAS deals and utilization gains must actually hit the P&L to justify the multiple.
Valuation: At 45× earnings, CLH trades 69% above the Other average (27×).
Bull case
PFAS opens a regulated revenue stream: Management signed a three-year PFAS water-filtration contract valued at $110 million. The deal locks in multi-year cash flow from a waste category driven by tightening federal regulation, giving Environmental Services a growing, near-recurring revenue line that was absent a few years ago.
Field services volume is accelerating: Field-services revenue grew 13%, supported by large-scale projects, well ahead of the 2% company-wide top line. That gap signals the project-based, lumpy portion of the business is inflecting and could lift blended growth once the new capacity comes online.
Balance sheet flexibility at record lows: Net leverage reached approximately 1.8 times, the lowest in nearly 15 years. With the debt load cleared, management has room to fund the $50 million fleet expansion or roll up smaller regional waste operators without diluting equity or stretching the credit profile.
Bear case
Commodity exposure in the fuel segment: Base-oil pricing is expected to decline slightly, pressuring Safety-Kleen Sustainability Solutions. Because that segment earns a spread over raw base-oil cost, even a modest price drop compresses per-gallon margin and is outside management's control, making the sustainable-fuel revenue line a moving target.
Valuation prices in flawless execution: The stock trades at 45.1x earnings versus a 27x industry average, a 69% premium, while revenue grew only 2% year over year and the operating margin sits at 8%. The gap between the multiple and the current earnings trajectory implies the market has already loaded in PFAS growth and utilization gains that have not yet shown up at scale.
Weather and seasonal disruption risk: Management described January as a difficult weather month. For a business that depends on trucks collecting waste and moving it to fixed processing sites, a single bad winter month can suppress volumes and shift cost timing, making quarterly results lumpy and harder to model.