Clean Harbors
Norwell, MA, United StatesFounded 1980Industry
Clean Harbors provides 24/7 hazmat emergency response, containment, decontamination, remediation and disposal, including biological and terrorist-response coverage and radiological services.
What it does
Profile
Clean Harbors is a Norwell, Massachusetts environmental and industrial services company founded in 1980 and listed on the New York Stock Exchange under CLH. It provides hazardous waste management, industrial cleaning, recycling and 24-hour emergency response.
More profile
It marked its 45th anniversary in 2025. In 2026 it completed the acquisitions of EnviroServe and ES&H for a combined 775 million dollars, expanding waste handling, emergency response and Gulf-region maritime capabilities, and it announced a planned acquisition of certain Depot Connect International businesses for about 130 million dollars.
Its annual report for 2025 is on the SEC register. Emergency response and decontamination are a small part of a large waste services business.
Government CBRN contract values were not read.
Ownership
Publicly listed on the NYSE (CLH)
Parent: none (publicly listed) (checked)
Sources (5)
- https://www.cleanharbors.com/about-us/history
- https://www.cleanharbors.com/2025/clean-harbors-marks-45th-anniversary
- https://www.sec.gov/Archives/edgar/data/822818/000110465926041920/tm262978d2_ars.pdf
- https://ir.cleanharbors.com/news-releases/news-release-details/clean-harbors-announces-fourth-quarter-and-full-year-2025
- https://ir.cleanharbors.com/news-releases/news-release-details/clean-harbors-completes-acquisitions-enviroserve-and-esh
Not verified or not found
- Government CBRN contracts: not read.
- Whether the Depot Connect acquisition has closed: not checked.
- Biological and radiological response capability: not confirmed in the pages read.
Questions
What does Clean Harbors do?
Clean Harbors provides 24/7 hazmat emergency response, containment, decontamination, remediation and disposal, including biological and terrorist-response coverage and radiological services.
Where is Clean Harbors based?
HQ (as found): Norwell, MA. HQ country: US.
Who owns Clean Harbors?
Publicly listed on the NYSE (CLH). Parent: none (publicly listed) (checked)
Profiles are compiled from public sources and sampled-checked, not fully audited. Last verified 17 October 2026. Report a correction