Clean Harbors, Inc. is an American provider of environmental and industrial services, including hazardous waste disposal for companies, small waste generators and federal, state, provincial and local governments. The company has expanded through organic growth and acquisitions to approximately 400 service locations in North America including over 50 hazardous waste management facilities in 38 U.S. states, seven Canadian provinces, Mexico, and Puerto Rico. The company is included in the S&P 400 mid-cap index and the S&P 1500 composite index. Wikipedia