EPA's national enforcement and compliance assurance program is characterized by its multi-media scope and breadth. The national program is responsible for maximizing compliance with 10 distinct federal environmental statutes dealing with prevention and control of air pollution, water pollution, hazardous waste, toxic substances, and pesticides. Most of these statutes have multiple program elements, and Office of Enforcement and Compliance Assurance (OECA) carries out compliance and enforcement activities in a total of 28 separate program areas. The statutory and regulatory requirements of these programs apply to approximately 41 million regulated entities, an enormous and diverse universe which needs to achieve and maintain compliance.