Clean Harbors to Acquire Depot Connect International’s Industrial and Rail Services Unit for $130 Million

Clean Harbors to Acquire EnviroServe

August 12, 2026

Environmental Services

Clean Harbors agreed to acquire EnviroServe from an affiliate of One Rock Capital Partners for $470 million in cash. The deal adds EnviroServe’s environmental and waste-management network, recurring customer base, and rail and emergency-response capabilities; Clean Harbors completed the acquisition on October 5, 2026.

Clean Harbors Acquires Terra Nova Solutions for $225 Million

May 14, 2026

Environmental Services

Clean Harbors, Inc. announced the all-cash $225 million acquisition of Terra Nova Solutions, a regional provider of hazardous and non-hazardous waste services. The deal adds five operating sites and complementary capabilities (including wastewater treatment, solidification, drum collection, tank cleaning, and vacuum services) to expand Clean Harbors’ Technical Services and Field Services footprint across the Carolinas.

Clean Harbors Acquires HEPACO for $400 Million

February 6, 2024

Environmental Services

Clean Harbors, Inc. completed its acquisition of HEPACO, a field and emergency response environmental services provider in the Eastern United States, for $400 million in cash. The deal was purchased from Gryphon Investors and financed via proceeds from a recently expanded $500 million term loan facility.

Clean Harbors Acquires Thompson Industrial Services from Reynolda Equity Partners

March 31, 2023

Industrial Services

Clean Harbors, Inc. acquired Thompson Industrial Services from Reynolda Equity Partners, expanding Clean Harbors' industrial cleaning and maintenance capabilities and adding density across the Southeastern United States. Thompson, a leading provider of hydroblasting, vacuuming and automated industrial cleaning solutions serving paper, mining, power and chemical customers, grew substantially under REP and will bring entrenched, recurring customer relationships to Clean Harbors' platform.

Clean Harbors Acquires HydroChemPSC from Littlejohn & Co. for $1.25 Billion

October 8, 2021

Industrial Services

Clean Harbors, Inc. completed the acquisition of HydroChemPSC (HPC), a U.S. provider of industrial cleaning, specialty maintenance and utilities services, from an affiliate of Littlejohn & Co. for $1.25 billion in cash. The transaction — financed with existing cash and proceeds from a new $1.0 billion incremental term loan — expands Clean Harbors' industrial services capabilities and creates cross-selling and margin-improvement opportunities across refining, chemical and utilities end markets.

Emerald Transformer Acquires Transformer Services Group From Clean Harbors

July 5, 2017

Industrial Services

Emerald Transformer, a division of Versatile Processing Group (an Insight Equity portfolio company), acquired the Transformer Services group of Clean Harbors. The deal — terms undisclosed — adds five facilities and expands Emerald Transformer’s national footprint and capabilities in transformer repair, equipment recycling, PCB disposal and oil processing.