EX-21 6 0006.txt CLEAN HARBORS, INC. AND SUBSIDIARIES EXHIBIT 21 CLEAN HARBORS, INC. AND SUBSIDIARIES SUBSIDIARIES
Principal Place of State of Incorporation Business ---------------------- ------------------ Clean Harbors Environmental Services, MA 1501 Washington Street Inc. Braintree, MA 02185-0327 Clean Harbors of Natick, Inc. MA 1501 Washington Street Braintree, MA 02185-0327 Clean Harbors of Braintree, Inc. MA 1501 Washington Street Braintree, MA 02185-0327 Clean Harbors Services, Inc. MA 1501 Washington Street Braintree, MA 02185-0327 Clean Harbors of Baltimore, Inc. PA 1501 Washington Street Braintree, MA 02185-0327 Clean Harbors of Connecticut, Inc. CT 1501 Washington Street Braintree, MA 02185-0327 Clean Harbors Kingston Facility MA 1501 Washington Street Corporation Braintree, MA 02185-0327 Harbor Management Consultants, Inc. MA 1501 Washington Street Braintree, MA 02185-0327 Murphy's Waste Oil Service, Inc. MA 1501 Washington Street Braintree, MA 02185-0327 Mr. Frank, Inc. IL 1501 Washington Street Braintree, MA 02185-0327 Northeast Casualty Risk Retention VT 1501 Washington Street Group, Inc. Braintree, MA 02185-0327 Spring Grove Resource Recovery, Inc. DE 1501 Washington Street Braintree, MA 02185-0327