Exhibit 21
Subsidiaries of the Registrant
3CI Complete Compliance Corporation, a Delaware corporation
American Medical Disposal, Inc., an Oklahoma corporation
BFI Medical Waste, Inc., a Delaware corporation
Biowaste Management Corp., a New York corporation
Bridgeview, Inc., a Pennsylvania corporation
Enviromed, Inc., a South Carolina corporation
Environmental Health Systems, Inc., a Nebraska corporation
Ionization Research Co., Inc., a California corporation
Medam S.A. de C.V, a Mexican corporation
Med-Tech Environmental, Inc., a Delaware corporation
Med-Tech Environmental (MA), Inc., a Delaware corporation
Micro-Med Industries, Inc., a Florida corporation
Micro-Med of Georgia, Inc., a Georgia corporation
Micro-Med of North Carolina, Inc., a North Carolina corporation
Micro-Med of Tennessee, Inc., a Tennessee corporation
Scherer Laboratories, Inc., a Texas corporation
Stericycle, Inc., a Canadian federal corporation
Stericycle International, LLC, a Delaware limited liability company
Stericycle International, Ltd., an English company
Stericycle of Washington, Inc., a Washington corporation
Stericycle of Puerto Rico, Inc., a Puerto Rico corporation
Stroud Properties, Inc., a Delaware corporation
White Rose Environmental Limited, an English company
Waste Systems, Inc., a Delaware corporation