Clean Harbors Announces Launch of Redesigned Website

NORWELL, Mass., April 10, 2008 (PRIME NEWSWIRE) -- Clean Harbors, Inc. ("Clean
Harbors") (Nasdaq:CLHB), the leading provider of environmental and hazardous
waste management services throughout North America, today announced the launch
of its redesigned website at www.cleanharbors.com.

"The updated website highlights the scope of Clean Harbors' services, as well as
the depth of our business, health and safety programs, and customer and investor
resources," said David Proud, Vice President, Marketing. "With enhanced
navigation, design and content, this site more accurately profiles our extensive
suite of services and reflects our standing as a leader in the waste management
industry."

The website is designed to be an educational experience in addition to providing
a wide array of resources and information, including comprehensive descriptions
of Clean Harbors' services, Company news and events, and investor relations
materials. Visitors to the site can access contact information for sales,
customer services, and investor relations representatives, as well as brochures
and fact sheets for Clean Harbors' services and facilities.

Clean Harbors' in-house marketing department designed and developed the new
website.

About Clean Harbors, Inc.

Clean Harbors, Inc. is North America's leading provider of environmental and
hazardous waste management services. With an unmatched infrastructure of 51
waste management facilities, including nine landfills, six incineration
locations and six wastewater treatment centers, the Company provides essential
services to over 45,000 customers, including more than 325 Fortune 500
companies, thousands of smaller private entities and numerous federal, state and
local governmental agencies. Headquartered in Norwell, Massachusetts, Clean
Harbors has more than 100 locations strategically positioned throughout North
America in 36 U.S. states, six Canadian provinces, Mexico and Puerto Rico. For
more information, visit www.cleanharbors.com.

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CONTACT: Clean Harbors Environmental Services, Inc.
David N. Proud, Vice President, Marketing
781.792.5000
proudd@cleanharbors.com