The **U.S. Environmental Protection Agency (EPA)**, established on December 2, 1970, is a federal agency tasked with protecting human health and the environment across the United States[1][2]. Its mission centers on ensuring Americans have clean air, land, and water, reducing environmental risks based on rigorous scientific data, and enforcing federal environmental laws fairly and effectively[2][3]. The EPA plays a pivotal role in environmental regulation, developing and enforcing standards for air and water quality, waste management, chemical safety, and pollution control. It administers key laws such as the Clean Air Act, Clean Water Act, Toxic Substances Control Act, and others that govern emissions, hazardous waste cleanup, and chemical safety[1][4][6]. The agency’s Office of Air and Radiation oversees air pollution and radiation protection programs, including setting National Ambient Air Quality Standards and regulating mobile and stationary pollution sources[4]. Beyond regulation, the EPA conducts scientific research, environmental assessments, and public education to inform policy and empower communities, businesses, and governments to manage environmental risks effectively[1][2]. It also provides grants to states, nonprofits, and academic institutions for environmental and public health research, often linked to toxic site remediation[1]. The agency fosters collaboration at local, state, tribal, and international levels to promote sustainable environmental stewardship and global environmental protection[3]. Notable achievements include the cleanup of numerous toxic sites, significant reductions in air and water pollution, and leadership in advancing energy efficiency and conservation programs[1][2][5]. The EPA’s enforcement efforts target the most critical environmental hazards, working with partners to ensure compliance and transparency, thereby protecting communities and ecosystems[6]. Currently, the EPA remains a vital force in addressing emerging environmental challenges, integrating science, law, and technology to safeguard public health and promote sustainable economic growth. Its commitment to transparency, innovation, and collaboration continues to shape U.S. environmental policy and global environmental leadership[3][6]