Clean Harbors Acquired Two Environmental Services Firms

The $775 million deal expands field service capabilities and adds specialized petrochemical and marine corridor infrastructure.

Updated on Oct. 5, 2026 in Corporate Finance

Bold flat-color editorial illustration of an industrial steel container, using a navy and cream palette to represent large-scale infrastructure acquisition. — Clean Harbors has completed the $775 million acquisition of EnviroServe and ES&H, bolstering its technical service network in marine and petrochemical industrial markets. AI Illustration. Upload story photo >

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Clean Harbors has completed the acquisition of EnviroServe and ES&H for a combined $775 million. The deal aims to strengthen the company’s Technical and Field Services divisions by integrating specialized assets across key industrial markets.

Why it matters

The acquisitions allow Clean Harbors to scale its capacity in petrochemical and marine corridors while folding new transfer facilities into its existing disposal and recycling network. This expansion positions the firm to better capture demand from clients requiring hazardous waste and spill response management.

The transaction cost Clean Harbors $775 million, which is expected to yield $340 million in annual revenue and approximately $87 million in post-synergy Adjusted EBITDA. The acquisition represents a post-synergy multiple of 8.9 times Adjusted EBITDA.

The players

Clean Harbors

A Norwell-based environmental and industrial services company providing hazardous waste disposal, recycling, and emergency response across North America.

EnviroServe

A Sandy, Utah-based environmental services firm operating 40 locations with waste management permits spanning 48 states.

ES&H

A Louisiana-based provider of environmental response and cleaning services holding high-level U.S. Coast Guard oil spill certifications.

The details

Clean Harbors funded the purchases using a combination of its own cash and a $600 million senior notes offering. The integration includes bringing EnviroServe’s 18 10-day transfer facilities into the company's broader disposal network. ES&H brings specialized spill response capacity, including the highest-tier U.S. Coast Guard classification, to support petrochemical clients.

Clean Harbors officially announced the completion of the acquisitions on October 5, 2026.

Market Landscape

The deal follows a pattern of consolidation among large-scale environmental services providers looking to build dense, regionalized networks. By acquiring assets with specific high-level U.S. Coast Guard Oil Spill Response Organization classifications, Clean Harbors gains protected market access.

Operators in the industrial and petrochemical space should monitor whether these newly combined service capacities lead to changes in regional pricing for hazardous waste management. Businesses currently using these services should review their existing contracts to ensure terms remain consistent during the transition.

The takeaway

This acquisition signals that environmental services firms are prioritizing specialized infrastructure in high-barrier-to-entry segments like marine spill response. Owners should track whether this increased scale leads to improved service reliability or tighter local vendor capacity for their own operations.