United States Environmental Protection Agency
Updated: September 3, 2024The EPA leads the nation’s environmental science, research, education, and assessment efforts, including in relation to air quality. The mission of the EPA is to protect human health and the environment. Since 1970, EPA has been working for a cleaner, healthier environment for the American people. Colorado is a part of EPA’s Region 8, which covers Colorado, North Dakota, South Dakota, Utah, Wyoming and numerous tribal reservations.