Nebraska.

Nebraska—TSP Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards AQCR 085 (Douglas and Sarpy Counties): Douglas County: Omaha X Remainder of Douglas County X Sarpy County: Bellevue X Remainder of Sarpy County X AQCR 086 1 X AQCR 145 X AQCR 146: Cass County X Dawson County 1 X Remainder of AQCR 146 X 1 EPA designation replaces state designation. Nebraska—1971 Sulfur Dioxide NAAQS [Primary and Secondary] Designated area Does not meet primary standards Does not meet secondary standards Cannot be classified Better than national standards Entire State X Nebraska—2010 Sulfur Dioxide NAAQS [Primary] Designated area 1 Designation Date 2 Type Statewide: Attainment/Unclassifiable. Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County 4/30/2021 Attainment/Unclassifiable. Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County 8/16/2021 Attainment/Unclassifiable. Lincoln County 9/12/2016 Attainment/Unclassifiable. Logan County Loup County Madison County McPherson County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County 9/12/2016 Attainment/Unclassifiable. Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County 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. Nebraska—Carbon Monoxide Designated Area Designation Classification Date 1 Type Date 1 Type Statewide Unclassifiable/Attainment Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County Lincoln County Logan County Loup County Madison County McPherson County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County 1 This date is November 15, 1990, unless otherwise noted. Nebraska—1978 Lead NAAQS Designated area Designation Classification Date Type Date Type Douglas County (part): Portion of city of Omaha bounded by: Jones Street on the south, Eleventh Street on the west, Avenue H and the Nebraska-Iowa border on the north, and the Missouri River on the east 4/20/2001 Attainment Nebraska—Ozone (1-Hour Standard) 2 Designated area Designation Classification Date 1 Type Date 1 Type Statewide Unclassifiable/Attainment Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County Lincoln County Logan County Loup County Madison County McPherson County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County 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 Nebraska. Nebraska—1997 Annual PM 2.5 NAAQS [Primary and Secondary] Designated area Designation a Classification Date 1 Type Date Type Statewide: Adams County Unclassifiable/Attainment. Antelope County Unclassifiable/Attainment. Arthur County Unclassifiable/Attainment. Banner County Unclassifiable/Attainment. Blaine County Unclassifiable/Attainment. Boone County Unclassifiable/Attainment. Box Butte County Unclassifiable/Attainment. Boyd County Unclassifiable/Attainment. Brown County Unclassifiable/Attainment. Buffalo County Unclassifiable/Attainment. Burt County Unclassifiable/Attainment. Butler County Unclassifiable/Attainment. Cass County Unclassifiable/Attainment. Cedar County Unclassifiable/Attainment. Chase County Unclassifiable/Attainment. Cherry County Unclassifiable/Attainment. Cheyenne County Unclassifiable/Attainment. Clay County Unclassifiable/Attainment. Colfax County Unclassifiable/Attainment. Cuming County Unclassifiable/Attainment. Custer County Unclassifiable/Attainment. Dakota County Unclassifiable/Attainment. Dawes County Unclassifiable/Attainment. Dawson County Unclassifiable/Attainment. Deuel County Unclassifiable/Attainment. Dixon County Unclassifiable/Attainment. Dodge County Unclassifiable/Attainment. Douglas County Unclassifiable/Attainment. Dundy County Unclassifiable/Attainment. Fillmore County Unclassifiable/Attainment. Franklin County Unclassifiable/Attainment. Frontier County Unclassifiable/Attainment. Furnas County Unclassifiable/Attainment. Gage County Unclassifiable/Attainment. Garden County Unclassifiable/Attainment. Garfield County Unclassifiable/Attainment. Gosper County Unclassifiable/Attainment. Grant County Unclassifiable/Attainment. Greeley County Unclassifiable/Attainment. Hall County Unclassifiable/Attainment. Hamilton County Unclassifiable/Attainment. Harlan County Unclassifiable/Attainment. Hayes County Unclassifiable/Attainment. Hitchcock County Unclassifiable/Attainment. Holt County Unclassifiable/Attainment. Hooker County Unclassifiable/Attainment. Howard County Unclassifiable/Attainment. Jefferson County Unclassifiable/Attainment. Johnson County Unclassifiable/Attainment. Kearney County Unclassifiable/Attainment. Keith County Unclassifiable/Attainment. Keya Paha County Unclassifiable/Attainment. Kimball County Unclassifiable/Attainment. Knox County Unclassifiable/Attainment. Lancaster County Unclassifiable/Attainment. Lincoln County Unclassifiable/Attainment. Logan County Unclassifiable/Attainment. Loup County Unclassifiable/Attainment. McPherson County Unclassifiable/Attainment. Madison County Unclassifiable/Attainment. Merrick County Unclassifiable/Attainment. Morrill County Unclassifiable/Attainment. Nance County Unclassifiable/Attainment. Nemaha County Unclassifiable/Attainment. Nuckolls County Unclassifiable/Attainment. Otoe County Unclassifiable/Attainment. Pawnee County Unclassifiable/Attainment. Perkins County Unclassifiable/Attainment. Phelps County Unclassifiable/Attainment. Pierce County Unclassifiable/Attainment. Platte County Unclassifiable/Attainment. Polk County Unclassifiable/Attainment. Red Willow County Unclassifiable/Attainment. Richardson County Unclassifiable/Attainment. Rock County Unclassifiable/Attainment. Saline County Unclassifiable/Attainment. Sarpy County Unclassifiable/Attainment. Saunders County Unclassifiable/Attainment. Scotts Bluff County Unclassifiable/Attainment. Seward County Unclassifiable/Attainment. Sheridan County Unclassifiable/Attainment. Sherman County Unclassifiable/Attainment. Sioux County Unclassifiable/Attainment. Stanton County Unclassifiable/Attainment. Thayer County Unclassifiable/Attainment. Thomas County Unclassifiable/Attainment. Thurston County Unclassifiable/Attainment. Valley County Unclassifiable/Attainment. Washington County Unclassifiable/Attainment. Wayne County Unclassifiable/Attainment. Webster County Unclassifiable/Attainment. Wheeler County Unclassifiable/Attainment. York County Unclassifiable/Attainment. a Includes Indian Country located in each county or area, except as otherwise specified. 1 This date is 90 days after January 5, 2005, unless otherwise noted. Nebraska—2012 Annual PM 2.5 NAAQS [Primary] Designated area 1 Designation Classification Date 2 Type Date 2 Type Statewide: Adams County Unclassifiable/Attainment Antelope County Unclassifiable/Attainment Arthur County Unclassifiable/Attainment Banner County Unclassifiable/Attainment Blaine County Unclassifiable/Attainment Boone County Unclassifiable/Attainment Box Butte County Unclassifiable/Attainment Boyd County Unclassifiable/Attainment Brown County Unclassifiable/Attainment Buffalo County Unclassifiable/Attainment Burt County Unclassifiable/Attainment Butler County Unclassifiable/Attainment Cass County Unclassifiable/Attainment Cedar County Unclassifiable/Attainment Chase County Unclassifiable/Attainment Cherry County Unclassifiable/Attainment Cheyenne County Unclassifiable/Attainment Clay County Unclassifiable/Attainment Colfax County Unclassifiable/Attainment Cuming County Unclassifiable/Attainment Custer County Unclassifiable/Attainment Dakota County Unclassifiable/Attainment Dawes County Unclassifiable/Attainment Dawson County Unclassifiable/Attainment Deuel County Unclassifiable/Attainment Dixon County Unclassifiable/Attainment Dodge County Unclassifiable/Attainment Douglas County Unclassifiable/Attainment Dundy County Unclassifiable/Attainment Fillmore County Unclassifiable/Attainment Franklin County Unclassifiable/Attainment Frontier County Unclassifiable/Attainment Furnas County Unclassifiable/Attainment Gage County Unclassifiable/Attainment Garden County Unclassifiable/Attainment Garfield County Unclassifiable/Attainment Gosper County Unclassifiable/Attainment Grant County Unclassifiable/Attainment Greeley County Unclassifiable/Attainment Hall County Unclassifiable/Attainment Hamilton County Unclassifiable/Attainment Harlan County Unclassifiable/Attainment Hayes County Unclassifiable/Attainment Hitchcock County Unclassifiable/Attainment Holt County Unclassifiable/Attainment Hooker County Unclassifiable/Attainment Howard County Unclassifiable/Attainment Jefferson County Unclassifiable/Attainment Johnson County Unclassifiable/Attainment Kearney County Unclassifiable/Attainment Keith County Unclassifiable/Attainment Keya Paha County Unclassifiable/Attainment Kimball County Unclassifiable/Attainment Knox County Unclassifiable/Attainment Lancaster County Unclassifiable/Attainment Lincoln County Unclassifiable/Attainment Logan County Unclassifiable/Attainment Loup County Unclassifiable/Attainment McPherson County Unclassifiable/Attainment Madison County Unclassifiable/Attainment Merrick County Unclassifiable/Attainment Morrill County Unclassifiable/Attainment Nance County Unclassifiable/Attainment Nemaha County Unclassifiable/Attainment Nuckolls County Unclassifiable/Attainment Otoe County Unclassifiable/Attainment Pawnee County Unclassifiable/Attainment Perkins County Unclassifiable/Attainment Phelps County Unclassifiable/Attainment Pierce County Unclassifiable/Attainment Platte County Unclassifiable/Attainment Polk County Unclassifiable/Attainment Red Willow County Unclassifiable/Attainment Richardson County Unclassifiable/Attainment Rock County Unclassifiable/Attainment Saline County Unclassifiable/Attainment Sarpy County Unclassifiable/Attainment Saunders County Unclassifiable/Attainment Scotts Bluff County Unclassifiable/Attainment Seward County Unclassifiable/Attainment Sheridan County Unclassifiable/Attainment Sherman County Unclassifiable/Attainment Sioux County Unclassifiable/Attainment Stanton County Unclassifiable/Attainment Thayer County Unclassifiable/Attainment Thomas County Unclassifiable/Attainment Thurston County Unclassifiable/Attainment Valley County Unclassifiable/Attainment Washington County Unclassifiable/Attainment Wayne County Unclassifiable/Attainment Webster County Unclassifiable/Attainment Wheeler County Unclassifiable/Attainment York County Unclassifiable/Attainment 1 Includes areas of Indian country located in each county or area, except as otherwise specified. 2 This date is April 15, 2015, unless otherwise noted. Nebraska—1997 24-Hour PM 2.5 NAAQS [Primary and Secondary] Designated area Designation a Classification Date 1 Type Date Type Statewide: Adams County Unclassifiable/Attainment. Antelope County Unclassifiable/Attainment. Arthur County Unclassifiable/Attainment. Banner County Unclassifiable/Attainment. Blaine County Unclassifiable/Attainment. Boone County Unclassifiable/Attainment. Box Butte County Unclassifiable/Attainment. Boyd County Unclassifiable/Attainment. Brown County Unclassifiable/Attainment. Buffalo County Unclassifiable/Attainment. Burt County Unclassifiable/Attainment. Butler County Unclassifiable/Attainment. Cass County Unclassifiable/Attainment. Cedar County Unclassifiable/Attainment. Chase County Unclassifiable/Attainment. Cherry County Unclassifiable/Attainment. Cheyenne County Unclassifiable/Attainment. Clay County Unclassifiable/Attainment. Colfax County Unclassifiable/Attainment. Cuming County Unclassifiable/Attainment. Custer County Unclassifiable/Attainment. Dakota County Unclassifiable/Attainment. Dawes County Unclassifiable/Attainment. Dawson County Unclassifiable/Attainment. Deuel County Unclassifiable/Attainment. Dixon County Unclassifiable/Attainment. Dodge County Unclassifiable/Attainment. Douglas County Unclassifiable/Attainment. Dundy County Unclassifiable/Attainment. Fillmore County Unclassifiable/Attainment. Franklin County Unclassifiable/Attainment. Frontier County Unclassifiable/Attainment. Furnas County Unclassifiable/Attainment. Gage County Unclassifiable/Attainment. Garden County Unclassifiable/Attainment. Garfield County Unclassifiable/Attainment. Gosper County Unclassifiable/Attainment. Grant County Unclassifiable/Attainment. Greeley County Unclassifiable/Attainment. Hall County Unclassifiable/Attainment. Hamilton County Unclassifiable/Attainment. Harlan County Unclassifiable/Attainment. Hayes County Unclassifiable/Attainment. Hitchcock County Unclassifiable/Attainment. Holt County Unclassifiable/Attainment. Hooker County Unclassifiable/Attainment. Howard County Unclassifiable/Attainment. Jefferson County Unclassifiable/Attainment. Johnson County Unclassifiable/Attainment. Kearney County Unclassifiable/Attainment. Keith County Unclassifiable/Attainment. Keya Paha County Unclassifiable/Attainment. Kimball County Unclassifiable/Attainment. Knox County Unclassifiable/Attainment. Lancaster County Unclassifiable/Attainment. Lincoln County Unclassifiable/Attainment. Logan County Unclassifiable/Attainment. Loup County Unclassifiable/Attainment. McPherson County Unclassifiable/Attainment. Madison County Unclassifiable/Attainment. Merrick County Unclassifiable/Attainment. Morrill County Unclassifiable/Attainment. Nance County Unclassifiable/Attainment. Nemaha County Unclassifiable/Attainment. Nuckolls County Unclassifiable/Attainment. Otoe County Unclassifiable/Attainment. Pawnee County Unclassifiable/Attainment. Perkins County Unclassifiable/Attainment. Phelps County Unclassifiable/Attainment. Pierce County Unclassifiable/Attainment. Platte County Unclassifiable/Attainment. Polk County Unclassifiable/Attainment. Red Willow County Unclassifiable/Attainment. Richardson County Unclassifiable/Attainment. Rock County Unclassifiable/Attainment. Saline County Unclassifiable/Attainment. Sarpy County Unclassifiable/Attainment. Saunders County Unclassifiable/Attainment. Scotts Bluff County Unclassifiable/Attainment. Seward County Unclassifiable/Attainment. Sheridan County Unclassifiable/Attainment. Sherman County Unclassifiable/Attainment. Sioux County Unclassifiable/Attainment. Stanton County Unclassifiable/Attainment. Thayer County Unclassifiable/Attainment. Thomas County Unclassifiable/Attainment. Thurston County Unclassifiable/Attainment. Valley County Unclassifiable/Attainment. Washington County Unclassifiable/Attainment. Wayne County Unclassifiable/Attainment. Webster County Unclassifiable/Attainment. Wheeler County Unclassifiable/Attainment. York County Unclassifiable/Attainment. a Includes Indian Country located in each county or area, except as otherwise specified. 1 This date is 90 days after January 5, 2005, unless otherwise noted. Nebraska—2006 24-Hour PM 2.5 NAAQS [Primary and Secondary] Designated area Designation a Classification Date 1 Type Date Type Statewide: Adams County Unclassifiable/Attainment. Antelope County Unclassifiable/Attainment. Arthur County Unclassifiable/Attainment. Banner County Unclassifiable/Attainment. Blaine County Unclassifiable/Attainment. Boone County Unclassifiable/Attainment. Box Butte County Unclassifiable/Attainment. Boyd County Unclassifiable/Attainment. Brown County Unclassifiable/Attainment. Buffalo County Unclassifiable/Attainment. Burt County Unclassifiable/Attainment. Butler County Unclassifiable/Attainment. Cass County Unclassifiable/Attainment. Cedar County Unclassifiable/Attainment. Chase County Unclassifiable/Attainment. Cherry County Unclassifiable/Attainment. Cheyenne County Unclassifiable/Attainment. Clay County Unclassifiable/Attainment. Colfax County Unclassifiable/Attainment. Cuming County Unclassifiable/Attainment. Custer County Unclassifiable/Attainment. Dakota County Unclassifiable/Attainment. Dawes County Unclassifiable/Attainment. Dawson County Unclassifiable/Attainment. Deuel County Unclassifiable/Attainment. Dixon County Unclassifiable/Attainment. Dodge County Unclassifiable/Attainment. Douglas County Unclassifiable/Attainment. Dundy County Unclassifiable/Attainment. Fillmore County Unclassifiable/Attainment. Franklin County Unclassifiable/Attainment. Frontier County Unclassifiable/Attainment. Furnas County Unclassifiable/Attainment. Gage County Unclassifiable/Attainment. Garden County Unclassifiable/Attainment. Garfield County Unclassifiable/Attainment. Gosper County Unclassifiable/Attainment. Grant County Unclassifiable/Attainment. Greeley County Unclassifiable/Attainment. Hall County Unclassifiable/Attainment. Hamilton County Unclassifiable/Attainment. Harlan County Unclassifiable/Attainment. Hayes County Unclassifiable/Attainment. Hitchcock County Unclassifiable/Attainment. Holt County Unclassifiable/Attainment. Hooker County Unclassifiable/Attainment. Howard County Unclassifiable/Attainment. Jefferson County Unclassifiable/Attainment. Johnson County Unclassifiable/Attainment. Kearney County Unclassifiable/Attainment. Keith County Unclassifiable/Attainment. Keya Paha County Unclassifiable/Attainment. Kimball County Unclassifiable/Attainment. Knox County Unclassifiable/Attainment. Lancaster County Unclassifiable/Attainment. Lincoln County Unclassifiable/Attainment. Logan County Unclassifiable/Attainment. Loup County Unclassifiable/Attainment. McPherson County Unclassifiable/Attainment. Madison County Unclassifiable/Attainment. Merrick County Unclassifiable/Attainment. Morrill County Unclassifiable/Attainment. Nance County Unclassifiable/Attainment. Nemaha County Unclassifiable/Attainment. Nuckolls County Unclassifiable/Attainment. Otoe County Unclassifiable/Attainment. Pawnee County Unclassifiable/Attainment. Perkins County Unclassifiable/Attainment. Phelps County Unclassifiable/Attainment. Pierce County Unclassifiable/Attainment. Platte County Unclassifiable/Attainment. Polk County Unclassifiable/Attainment. Red Willow County Unclassifiable/Attainment. Richardson County Unclassifiable/Attainment. Rock County Unclassifiable/Attainment. Saline County Unclassifiable/Attainment. Sarpy County Unclassifiable/Attainment. Saunders County Unclassifiable/Attainment. Scotts Bluff County Unclassifiable/Attainment. Seward County Unclassifiable/Attainment. Sheridan County Unclassifiable/Attainment. Sherman County Unclassifiable/Attainment. Sioux County Unclassifiable/Attainment. Stanton County Unclassifiable/Attainment. Thayer County Unclassifiable/Attainment. Thomas County Unclassifiable/Attainment. Thurston County Unclassifiable/Attainment. Valley County Unclassifiable/Attainment. Washington County Unclassifiable/Attainment. Wayne County Unclassifiable/Attainment. Webster County Unclassifiable/Attainment. Wheeler County Unclassifiable/Attainment. York County Unclassifiable/Attainment. a Includes Indian Country located in each county or area, except as otherwise specified. 1 This date is 30 days after November 13, 2009, unless otherwise noted. Nebraska—NO 2 (1971 Annual Standard) Designated area Does not meet primary standards Cannot be classified or better than national standards Entire State X Nebraska—NO 2 (2010 1-Hour Standard) Designated area Designation a Date 1 Type Adams County Unclassifiable/Attainment. Antelope County Unclassifiable/Attainment. Arthur County Unclassifiable/Attainment. Banner County Unclassifiable/Attainment. Blaine County Unclassifiable/Attainment. Boone County Unclassifiable/Attainment. Box Butte County Unclassifiable/Attainment. Boyd County Unclassifiable/Attainment. Brown County Unclassifiable/Attainment. Buffalo County Unclassifiable/Attainment. Burt County Unclassifiable/Attainment. Butler County Unclassifiable/Attainment. Cass County Unclassifiable/Attainment. Cedar County Unclassifiable/Attainment. Chase County Unclassifiable/Attainment. Cherry County Unclassifiable/Attainment. Cheyenne County Unclassifiable/Attainment. Clay County Unclassifiable/Attainment. Colfax County Unclassifiable/Attainment. Cuming County Unclassifiable/Attainment. Custer County Unclassifiable/Attainment. Dakota County Unclassifiable/Attainment. Dawes County Unclassifiable/Attainment. Dawson County Unclassifiable/Attainment. Deuel County Unclassifiable/Attainment. Dixon County Unclassifiable/Attainment. Dodge County Unclassifiable/Attainment. Douglas County Unclassifiable/Attainment. Dundy County Unclassifiable/Attainment. Fillmore County Unclassifiable/Attainment. Franklin County Unclassifiable/Attainment. Frontier County Unclassifiable/Attainment. Furnas County Unclassifiable/Attainment. Gage County Unclassifiable/Attainment. Garden County Unclassifiable/Attainment. Garfield County Unclassifiable/Attainment. Gosper County Unclassifiable/Attainment. Grant County Unclassifiable/Attainment. Greeley County Unclassifiable/Attainment. Hall County Unclassifiable/Attainment. Hamilton County Unclassifiable/Attainment. Harlan County Unclassifiable/Attainment. Hayes County Unclassifiable/Attainment. Hitchcock County Unclassifiable/Attainment. Holt County Unclassifiable/Attainment. Hooker County Unclassifiable/Attainment. Howard County Unclassifiable/Attainment. Jefferson County Unclassifiable/Attainment. Johnson County Unclassifiable/Attainment. Kearney County Unclassifiable/Attainment. Keith County Unclassifiable/Attainment. Keya Paha County Unclassifiable/Attainment. Kimball County Unclassifiable/Attainment. Knox County Unclassifiable/Attainment. Lancaster County Unclassifiable/Attainment. Lincoln County Unclassifiable/Attainment. Logan County Unclassifiable/Attainment. Loup County Unclassifiable/Attainment. McPherson County Unclassifiable/Attainment. Madison County Unclassifiable/Attainment. Merrick County Unclassifiable/Attainment. Morrill County Unclassifiable/Attainment. Nance County Unclassifiable/Attainment. Nemaha County Unclassifiable/Attainment. Nuckolls County Unclassifiable/Attainment. Otoe County Unclassifiable/Attainment. Pawnee County Unclassifiable/Attainment. Perkins County Unclassifiable/Attainment. Phelps County Unclassifiable/Attainment. Pierce County Unclassifiable/Attainment. Platte County Unclassifiable/Attainment. Polk County Unclassifiable/Attainment. Red Willow County Unclassifiable/Attainment. Richardson County Unclassifiable/Attainment. Rock County Unclassifiable/Attainment. Saline County Unclassifiable/Attainment. Sarpy County Unclassifiable/Attainment. Saunders County Unclassifiable/Attainment. Scotts Bluff County Unclassifiable/Attainment. Seward County Unclassifiable/Attainment. Sheridan County Unclassifiable/Attainment. Sherman County Unclassifiable/Attainment. Sioux County Unclassifiable/Attainment. Stanton County Unclassifiable/Attainment. Thayer County Unclassifiable/Attainment. Thomas County Unclassifiable/Attainment. Thurston County Unclassifiable/Attainment. Valley County Unclassifiable/Attainment. Washington County Unclassifiable/Attainment. Wayne County Unclassifiable/Attainment. Webster County Unclassifiable/Attainment. Wheeler County Unclassifiable/Attainment. York County Unclassifiable/Attainment. a Includes Indian Country located in each county or area, except as otherwise specified. 1 This date is 90 days after October 31, 2011, unless otherwise noted. Nebraska—1997 8-Hour Ozone NAAQS [Primary and Secondary] Designated area Designation a Category/classification Date 1 Type Date 1 Type Statewide: Unclassifiable/Attainment Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County Lincoln County Logan County Loup County Madison County McPherson County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County a Includes Indian Country located in each county or area, except as otherwise specified. 1 This date is June 15, 2004, unless otherwise noted. Nebraska—2008 8-Hour Ozone NAAQS [Primary and Secondary] Designated area Designation Classification Date 1 Type Date 1 Type Statewide: 2 Unclassifiable/Attainment Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County Lincoln County Logan County Loup County McPherson County Madison County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County 1 This date is July 20, 2012, unless otherwise noted. 2 Includes any Indian country in each county or area, unless otherwise specified. Nebraska—2015 8-Hour Ozone NAAQS [Primary and Secondary] Designated area 1 Designation Classification Date 2 Type Date Type Statewide Attainment/Unclassifiable Adams County Antelope County Arthur County Banner County Blaine County Boone County Box Butte County Boyd County Brown County Buffalo County Burt County Butler County Cass County Cedar County Chase County Cherry County Cheyenne County Clay County Colfax County Cuming County Custer County Dakota County Dawes County Dawson County Deuel County Dixon County Dodge County Douglas County Dundy County Fillmore County Franklin County Frontier County Furnas County Gage County Garden County Garfield County Gosper County Grant County Greeley County Hall County Hamilton County Harlan County Hayes County Hitchcock County Holt County Hooker County Howard County Jefferson County Johnson County Kearney County Keith County Keya Paha County Kimball County Knox County Lancaster County Lincoln County Logan County Loup County McPherson County Madison County Merrick County Morrill County Nance County Nemaha County Nuckolls County Otoe County Pawnee County Perkins County Phelps County Pierce County Platte County Polk County Red Willow County Richardson County Rock County Saline County Sarpy County Saunders County Scotts Bluff County Seward County Sheridan County Sherman County Sioux County Stanton County Thayer County Thomas County Thurston County Valley County Washington County Wayne County Webster County Wheeler County York County 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 January 16, 2018, unless otherwise noted. Nebraska—2008 Lead NAAQS Designated area Designation for the 2008 NAAQS a Date 1 Type Whole State Unclassifiable/Attainment. a Includes Indian Country located in each county or area, except as otherwise specified. 1 December 31, 2011 unless otherwise noted. [43 FR 8964, Mar. 3, 1978] Editorial Note: For Federal Register citations affecting § 81.328, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.