§ 81.342 South Dakota.

South Dakota—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

South Dakota—2010 Sulfur Dioxide NAAQS

[Primary]

¹ Includes any Indian country in each county or area, unless otherwise specified. EPA is not determining the boundaries of any area of Indian country in this table, including any area of Indian country located in the larger designation area. The inclusion of any Indian country in the designation area is not a determination that the state has regulatory authority under the Clean Air Act for such Indian country.

² This date is April 9, 2018, unless otherwise noted.

South Dakota—Carbon Monoxide

¹ This date is November 15, 1990, unless otherwise noted.

South Dakota—Ozone (1-Hour Standard) ²

¹ This date is October 18, 2000, unless otherwise noted.

² The 1-hour ozone standard is revoked effective June 15, 2005 for all areas in South Dakota.

South Dakota—PM–10

¹ Denotes a single area designation for PSD baseline area purposes.

South Dakota—1997 Annual PM_2.5 NAAQS

[Primary and Secondary]