40 CFR § 81.335 - North Dakota.
§ 81.335 North Dakota.
North Dakota—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 |
|---|---|---|---|---|
| Metropolitan Fargo-Moorhead (Minn), AQCR 130 | X | |||
| Rest of State, AQCR 172 | X |
North Dakota—2010 Sulfur Dioxide NAAQS
[Primary]
| Designated area 1 | Designation | |
|---|---|---|
| Date 2 | Type | |
| McLean County/Eastern Mercer County, ND | 9/12/16 | Attainment/Unclassifiable. |
| McLean County | ||
| Mercer County (part) | ||
| Area east of CR-37/ND 31, east/north of ND 200 ALT, west of the eastern border of Mercer County/Missouri River, south of the Knife River National Historic Site. | ||
| Central Mercer County, ND | 9/12/16 | Attainment/Unclassifiable. |
| Mercer County (part) | ||
| Area west of ND 49/61st Ave SW, north of Co. Rd 15/17th St. SW, east of Co. Rd 13, south and east of the town Zap, south of 8th St. SW/ND 200 | ||
| Rest of State: | Attainment/Unclassifiable. | |
| Adams County | ||
| Barnes County | ||
| Benson County | ||
| Billings County | ||
| Bottineau County | ||
| Bowman County | ||
| Burke County | ||
| Burleigh County | ||
| Cass County | ||
| Cavalier County | ||
| Dickey County | ||
| Divide County | ||
| Dunn County | ||
| Eddy County | ||
| Emmons County | ||
| Foster County | ||
| Golden Valley County | ||
| Grand Forks County | ||
| Grant County | ||
| Griggs County | ||
| Hettinger County | ||
| Kidder County | ||
| LaMoure County | ||
| Logan County | ||
| McHenry County | ||
| McIntosh County | ||
| McKenzie County | ||
| Mercer County (part) (remainder) | ||
| Morton County | ||
| Mountrail County | ||
| Nelson County | ||
| Oliver County | ||
| Pembina County | ||
| Pierce County | ||
| Ramsey County | ||
| Ransom County | ||
| Renville County | ||
| Richland County | ||
| Rolette County | ||
| Sargent County | ||
| Sheridan County | ||
| Sioux County | ||
| Slope County | ||
| Stark County | ||
| Steele County | ||
| Stutsman County | ||
| Towner County | ||
| Traill County | ||
| Walsh County | ||
| Ward County | ||
| Wells County | ||
| Williams County | 4/30/2021 | |
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.
North Dakota—Carbon Monoxide
| Designated Area | Designation | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date 1 | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Intrastate | ||||
| Cass County | Unclassifiable/Attainment | |||
| Rest of State | Unclassifiable/Attainment | |||
| Adams County | ||||
| Barnes County | ||||
| Benson County | ||||
| Billings County | ||||
| Bottineau County | ||||
| Bowman County | ||||
| Burke County | ||||
| Burleigh County | ||||
| Cavalier County | ||||
| Dickey County | ||||
| Divide County | ||||
| Dunn County | ||||
| Eddy County | ||||
| Emmons County | ||||
| Foster County | ||||
| Golden Valley County | ||||
| Grand Forks County | ||||
| Grant County | ||||
| Griggs County | ||||
| Hettinger County | ||||
| Kidder County | ||||
| La Moure County | ||||
| Logan County | ||||
| McHenry County | ||||
| McIntosh County | ||||
| McKenzie County | ||||
| McLean County | ||||
| Mercer County | ||||
| Morton County | ||||
| Mountrail County | ||||
| Nelson County | ||||
| Oliver County | ||||
| Pembina County | ||||
| Pierce County | ||||
| Ramsey County | ||||
| Ransom County | ||||
| Renville County | ||||
| Richland County | ||||
| Rolette County | ||||
| Sargent County | ||||
| Sheridan County | ||||
| Sioux County | ||||
| Slope County | ||||
| Stark County | ||||
| Steele County | ||||
| Stutsman County | ||||
| Towner County | ||||
| Traill County | ||||
| Walsh County | ||||
| Ward County | ||||
| Wells County | ||||
| Williams County | ||||
1 This date is November 15, 1990, unless otherwise noted.
North Dakota—Ozone (1-Hour Standard) 2
| Designated area | Designation | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date 1 | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate. | ||||
| Cass County | Unclassifiable/Attainment | |||
| Rest of State, AQCR 172 | Unclassifiable/Attainment | |||
| Adams County | ||||
| Barnes County | ||||
| Benson County | ||||
| Billings County | ||||
| Bottineau County | ||||
| Bowman County | ||||
| Burke County | ||||
| Burleigh County | ||||
| Cavalier County | ||||
| Dickey County | ||||
| Divide County | ||||
| Dunn County | ||||
| Eddy County | ||||
| Emmons County | ||||
| Foster County | ||||
| Golden Valley County | ||||
| Grand Forks County | ||||
| Grant County | ||||
| Griggs County | ||||
| Hettinger County | ||||
| Kidder County | ||||
| La Moure County | ||||
| Logan County | ||||
| McHenry County | ||||
| McIntosh County | ||||
| McKenzie County | ||||
| McLean County | ||||
| Mercer County | ||||
| Morton County | ||||
| Mountrail County | ||||
| Nelson County | ||||
| Oliver County | ||||
| Pembina County | ||||
| Pierce County | ||||
| Ramsey County | ||||
| Ransom County | ||||
| Renville County | ||||
| Richland County | ||||
| Rolette County | ||||
| Sargent County | ||||
| Sheridan County | ||||
| Sioux County | ||||
| Slope County | ||||
| Stark County | ||||
| Steele County | ||||
| Stutsman County | ||||
| Towner County | ||||
| Traill County | ||||
| Walsh County | ||||
| Ward County | ||||
| Wells County | ||||
| Williams 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 North Dakota.
North Dakota—PM-10
| Designated Area | Designation | Classification | ||
|---|---|---|---|---|
| Date | Type | Date | Type | |
| Metropolitan Fargo-Moorhead (Minn.), AQCR 130 | 11/15/90 | Unclassifiable | ||
| Rest of State, AQCR 172 1 | 11/15/90 | Unclassifiable | ||
1 Denotes a single area designation for PSD baseline area purposes.
North Dakota—1997 Annual PM2.5 NAAQS
[Primary and Secondary]
| Designated area | Designation a | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate: | ||||
| Cass County | Unclassifiable/Attainment. | |||
| Rest of State, AQCR 172: | ||||
| Adams County | Unclassifiable/Attainment. | |||
| Barnes County | Unclassifiable/Attainment. | |||
| Benson County | Unclassifiable/Attainment. | |||
| Billings County | Unclassifiable/Attainment. | |||
| Bottineau County | Unclassifiable/Attainment. | |||
| Bowman County | Unclassifiable/Attainment. | |||
| Burke County | Unclassifiable/Attainment. | |||
| Burleigh County | Unclassifiable/Attainment. | |||
| Cavalier County | Unclassifiable/Attainment. | |||
| Dickey County | Unclassifiable/Attainment. | |||
| Divide County | Unclassifiable/Attainment. | |||
| Dunn County | Unclassifiable/Attainment. | |||
| Eddy County | Unclassifiable/Attainment. | |||
| Emmons County | Unclassifiable/Attainment. | |||
| Foster County | Unclassifiable/Attainment. | |||
| Golden Valley County | Unclassifiable/Attainment. | |||
| Grand Forks County | Unclassifiable/Attainment. | |||
| Grant County | Unclassifiable/Attainment. | |||
| Griggs County | Unclassifiable/Attainment. | |||
| Hettinger County | Unclassifiable/Attainment. | |||
| Kidder County | Unclassifiable/Attainment. | |||
| LaMoure County | Unclassifiable/Attainment. | |||
| Logan County | Unclassifiable/Attainment. | |||
| McHenry County | Unclassifiable/Attainment. | |||
| McIntosh County | Unclassifiable/Attainment. | |||
| McKenzie County | Unclassifiable/Attainment. | |||
| McLean County | Unclassifiable/Attainment. | |||
| Mercer County | Unclassifiable/Attainment. | |||
| Morton County | Unclassifiable/Attainment. | |||
| Mountrail County | Unclassifiable/Attainment. | |||
| Nelson County | Unclassifiable/Attainment. | |||
| Oliver County | Unclassifiable/Attainment. | |||
| Pembina County | Unclassifiable/Attainment. | |||
| Pierce County | Unclassifiable/Attainment. | |||
| Ramsey County | Unclassifiable/Attainment. | |||
| Ransom County | Unclassifiable/Attainment. | |||
| Renville County | Unclassifiable/Attainment. | |||
| Richland County | Unclassifiable/Attainment. | |||
| Rolette County | Unclassifiable/Attainment. | |||
| Sargent County | Unclassifiable/Attainment. | |||
| Sheridan County | Unclassifiable/Attainment. | |||
| Sioux County | Unclassifiable/Attainment. | |||
| Slope County | Unclassifiable/Attainment. | |||
| Stark County | Unclassifiable/Attainment. | |||
| Steele County | Unclassifiable/Attainment. | |||
| Stutsman County | Unclassifiable/Attainment. | |||
| Towner County | Unclassifiable/Attainment. | |||
| Traill County | Unclassifiable/Attainment. | |||
| Walsh County | Unclassifiable/Attainment. | |||
| Ward County | Unclassifiable/Attainment. | |||
| Wells County | Unclassifiable/Attainment. | |||
| Williams 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.
North Dakota—2012 Annual PM2.5 NAAQS
[Primary]
| Designated area 1 | Designation | Classification | ||
|---|---|---|---|---|
| Date 2 | Type | Date 2 | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate: | ||||
| Cass County | Unclassifiable/Attainment | |||
| Rest of State, AQCR 172: | ||||
| Adams County | Unclassifiable/Attainment | |||
| Barnes County | Unclassifiable/Attainment | |||
| Benson County | Unclassifiable/Attainment | |||
| Billings County | Unclassifiable/Attainment | |||
| Bottineau County | Unclassifiable/Attainment | |||
| Bowman County | Unclassifiable/Attainment | |||
| Burke County | Unclassifiable/Attainment | |||
| Burleigh County | Unclassifiable/Attainment | |||
| Cavalier County | Unclassifiable/Attainment | |||
| Dickey County | Unclassifiable/Attainment | |||
| Divide County | Unclassifiable/Attainment | |||
| Dunn County | Unclassifiable/Attainment | |||
| Eddy County | Unclassifiable/Attainment | |||
| Emmons County | Unclassifiable/Attainment | |||
| Foster County | Unclassifiable/Attainment | |||
| Golden Valley County | Unclassifiable/Attainment | |||
| Grand Forks County | Unclassifiable/Attainment | |||
| Grant County | Unclassifiable/Attainment | |||
| Griggs County | Unclassifiable/Attainment | |||
| Hettinger County | Unclassifiable/Attainment | |||
| Kidder County | Unclassifiable/Attainment | |||
| LaMoure County | Unclassifiable/Attainment | |||
| Logan County | Unclassifiable/Attainment | |||
| McHenry County | Unclassifiable/Attainment | |||
| McIntosh County | Unclassifiable/Attainment | |||
| McKenzie County | Unclassifiable/Attainment | |||
| McLean County | Unclassifiable/Attainment | |||
| Mercer County | Unclassifiable/Attainment | |||
| Morton County | Unclassifiable/Attainment | |||
| Mountrail County | Unclassifiable/Attainment | |||
| Nelson County | Unclassifiable/Attainment | |||
| Oliver County | Unclassifiable/Attainment | |||
| Pembina County | Unclassifiable/Attainment | |||
| Pierce County | Unclassifiable/Attainment | |||
| Ramsey County | Unclassifiable/Attainment | |||
| Ransom County | Unclassifiable/Attainment | |||
| Renville County | Unclassifiable/Attainment | |||
| Richland County | Unclassifiable/Attainment | |||
| Rolette County | Unclassifiable/Attainment | |||
| Sargent County | Unclassifiable/Attainment | |||
| Sheridan County | Unclassifiable/Attainment | |||
| Sioux County | Unclassifiable/Attainment | |||
| Slope County | Unclassifiable/Attainment | |||
| Stark County | Unclassifiable/Attainment | |||
| Steele County | Unclassifiable/Attainment | |||
| Stutsman County | Unclassifiable/Attainment | |||
| Towner County | Unclassifiable/Attainment | |||
| Traill County | Unclassifiable/Attainment | |||
| Walsh County | Unclassifiable/Attainment | |||
| Ward County | Unclassifiable/Attainment | |||
| Wells County | Unclassifiable/Attainment | |||
| Williams 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.
North Dakota—1997 24-Hour PM2.5 NAAQS
[Primary and Secondary]
| Designated area | Designation a | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate: | ||||
| Cass County | Unclassifiable/Attainment. | |||
| Rest of State, AQCR 172: | ||||
| Adams County | Unclassifiable/Attainment. | |||
| Barnes County | Unclassifiable/Attainment. | |||
| Benson County | Unclassifiable/Attainment. | |||
| Billings County | Unclassifiable/Attainment. | |||
| Bottineau County | Unclassifiable/Attainment. | |||
| Bowman County | Unclassifiable/Attainment. | |||
| Burke County | Unclassifiable/Attainment. | |||
| Burleigh County | Unclassifiable/Attainment. | |||
| Cavalier County | Unclassifiable/Attainment. | |||
| Dickey County | Unclassifiable/Attainment. | |||
| Divide County | Unclassifiable/Attainment. | |||
| Dunn County | Unclassifiable/Attainment. | |||
| Eddy County | Unclassifiable/Attainment. | |||
| Emmons County | Unclassifiable/Attainment. | |||
| Foster County | Unclassifiable/Attainment. | |||
| Golden Valley County | Unclassifiable/Attainment. | |||
| Grand Forks County | Unclassifiable/Attainment. | |||
| Grant County | Unclassifiable/Attainment. | |||
| Griggs County | Unclassifiable/Attainment. | |||
| Hettinger County | Unclassifiable/Attainment. | |||
| Kidder County | Unclassifiable/Attainment. | |||
| LaMoure County | Unclassifiable/Attainment. | |||
| Logan County | Unclassifiable/Attainment. | |||
| McHenry County | Unclassifiable/Attainment. | |||
| McIntosh County | Unclassifiable/Attainment. | |||
| McKenzie County | Unclassifiable/Attainment. | |||
| McLean County | Unclassifiable/Attainment. | |||
| Mercer County | Unclassifiable/Attainment. | |||
| Morton County | Unclassifiable/Attainment. | |||
| Mountrail County | Unclassifiable/Attainment. | |||
| Nelson County | Unclassifiable/Attainment. | |||
| Oliver County | Unclassifiable/Attainment. | |||
| Pembina County | Unclassifiable/Attainment. | |||
| Pierce County | Unclassifiable/Attainment. | |||
| Ramsey County | Unclassifiable/Attainment. | |||
| Ransom County | Unclassifiable/Attainment. | |||
| Renville County | Unclassifiable/Attainment. | |||
| Richland County | Unclassifiable/Attainment. | |||
| Rolette County | Unclassifiable/Attainment. | |||
| Sargent County | Unclassifiable/Attainment. | |||
| Sheridan County | Unclassifiable/Attainment. | |||
| Sioux County | Unclassifiable/Attainment. | |||
| Slope County | Unclassifiable/Attainment. | |||
| Stark County | Unclassifiable/Attainment. | |||
| Steele County | Unclassifiable/Attainment. | |||
| Stutsman County | Unclassifiable/Attainment. | |||
| Towner County | Unclassifiable/Attainment. | |||
| Traill County | Unclassifiable/Attainment. | |||
| Walsh County | Unclassifiable/Attainment. | |||
| Ward County | Unclassifiable/Attainment. | |||
| Wells County | Unclassifiable/Attainment. | |||
| Williams 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.
North Dakota—2006 24-Hour PM2.5 NAAQS
[Primary and Secondary]
| Designated area | Designation a | Classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate: | ||||
| Cass County | Unclassifiable/Attainment. | |||
| Rest of State, AQCR 172: | ||||
| Adams County | Unclassifiable/Attainment. | |||
| Barnes County | Unclassifiable/Attainment. | |||
| Benson County | Unclassifiable/Attainment. | |||
| Billings County | Unclassifiable/Attainment. | |||
| Bottineau County | Unclassifiable/Attainment. | |||
| Bowman County | Unclassifiable/Attainment. | |||
| Burke County | Unclassifiable/Attainment. | |||
| Burleigh County | Unclassifiable/Attainment. | |||
| Cavalier County | Unclassifiable/Attainment. | |||
| Dickey County | Unclassifiable/Attainment. | |||
| Divide County | Unclassifiable/Attainment. | |||
| Dunn County | Unclassifiable/Attainment. | |||
| Eddy County | Unclassifiable/Attainment. | |||
| Emmons County | Unclassifiable/Attainment. | |||
| Foster County | Unclassifiable/Attainment. | |||
| Golden Valley County | Unclassifiable/Attainment. | |||
| Grand Forks County | Unclassifiable/Attainment. | |||
| Grant County | Unclassifiable/Attainment. | |||
| Griggs County | Unclassifiable/Attainment. | |||
| Hettinger County | Unclassifiable/Attainment. | |||
| Kidder County | Unclassifiable/Attainment. | |||
| LaMoure County | Unclassifiable/Attainment. | |||
| Logan County | Unclassifiable/Attainment. | |||
| McHenry County | Unclassifiable/Attainment. | |||
| McIntosh County | Unclassifiable/Attainment. | |||
| McKenzie County | Unclassifiable/Attainment. | |||
| McLean County | Unclassifiable/Attainment. | |||
| Mercer County | Unclassifiable/Attainment. | |||
| Morton County | Unclassifiable/Attainment. | |||
| Mountrail County | Unclassifiable/Attainment. | |||
| Nelson County | Unclassifiable/Attainment. | |||
| Oliver County | Unclassifiable/Attainment. | |||
| Pembina County | Unclassifiable/Attainment. | |||
| Pierce County | Unclassifiable/Attainment. | |||
| Ramsey County | Unclassifiable/Attainment. | |||
| Ransom County | Unclassifiable/Attainment. | |||
| Renville County | Unclassifiable/Attainment. | |||
| Richland County | Unclassifiable/Attainment. | |||
| Rolette County | Unclassifiable/Attainment. | |||
| Sargent County | Unclassifiable/Attainment. | |||
| Sheridan County | Unclassifiable/Attainment. | |||
| Sioux County | Unclassifiable/Attainment. | |||
| Slope County | Unclassifiable/Attainment. | |||
| Stark County | Unclassifiable/Attainment. | |||
| Steele County | Unclassifiable/Attainment. | |||
| Stutsman County | Unclassifiable/Attainment. | |||
| Towner County | Unclassifiable/Attainment. | |||
| Traill County | Unclassifiable/Attainment. | |||
| Walsh County | Unclassifiable/Attainment. | |||
| Ward County | Unclassifiable/Attainment. | |||
| Wells County | Unclassifiable/Attainment. | |||
| Williams 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.
North Dakota—NO2 (1971 Annual Standard)
| Designated area | Does not meet primary standards | Cannot be classified or better than national standards |
|---|---|---|
| Metropolitan Fargo-Moorhead (Minn), AQCR 130 | X | |
| Rest of State, AQCR 172 | X |
North Dakota—NO2 (2010 1-Hour Standard)
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.
North Dakota—1997 8-Hour Ozone NAAQS
[Primary and Secondary]
| Designated area | Designation a | Category/classification | ||
|---|---|---|---|---|
| Date 1 | Type | Date 1 | Type | |
| AQCR 130 Metropolitan Fargo-Moorhead Interstate: | ||||
| Cass County | Unclassifiable/Attainment | |||
| Rest of State, AQCR 172 | Unclassifiable/Attainment | |||
| Adams County | ||||
| Barnes County | ||||
| Benson County | ||||
| Billings County | ||||
| Bottineau County | ||||
| Bowman County | ||||
| Burke County | ||||
| Burleigh County | ||||
| Cavalier County | ||||
| Dickey County | ||||
| Divide County | ||||
| Dunn County | ||||
| Eddy County | ||||
| Emmons County | ||||
| Foster County | ||||
| Golden Valley County | ||||
| Grand Forks County | ||||
| Grant County | ||||
| Griggs County | ||||
| Hettinger County | ||||
| Kidder County | ||||
| LaMoure County | ||||
| Logan County | ||||
| McHenry County | ||||
| McIntosh County | ||||
| McKenzie County | ||||
| McLean County | ||||
| Mercer County | ||||
| Morton County | ||||
| Mountrail County | ||||
| Nelson County | ||||
| Oliver County | ||||
| Pembina County | ||||
| Pierce County | ||||
| Ramsey County | ||||
| Ransom County | ||||
| Renville County | ||||
| Richland County | ||||
| Rolette County | ||||
| Sargent County | ||||
| Sheridan County | ||||
| Sioux County | ||||
| Slope County | ||||
| Stark County | ||||
| Steele County | ||||
| Stutsman County | ||||
| Towner County | ||||
| Traill County | ||||
| Walsh County | ||||
| Ward County | ||||
| Wells County | ||||
| Williams 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.
North Dakota—2008 8-Hour Ozone NAAQS
[Primary and Secondary]
1 This date is July 20, 2012, unless otherwise noted.
North Dakota—2015 8-Hour Ozone NAAQS
[Primary and Secondary]
| Designated area 1 | Designation | Classification | ||
|---|---|---|---|---|
| Date 2 | Type | Date | Type | |
| Statewide | Attainment/Unclassifiable | |||
| Adams County | ||||
| Barnes County | ||||
| Benson County | ||||
| Billings County | ||||
| Bottineau County | ||||
| Bowman County | ||||
| Burke County | ||||
| Burleigh County | ||||
| Cass County | ||||
| Cavalier County | ||||
| Dickey County | ||||
| Divide County | ||||
| Dunn County | ||||
| Eddy County | ||||
| Emmons County | ||||
| Foster County | ||||
| Golden Valley County | ||||
| Grand Forks County | ||||
| Grant County | ||||
| Griggs County | ||||
| Hettinger County | ||||
| Kidder County | ||||
| LaMoure County | ||||
| Logan County | ||||
| McHenry County | ||||
| McIntosh County | ||||
| McKenzie County | ||||
| McLean County | ||||
| Mercer County | ||||
| Morton County | ||||
| Mountrail County | ||||
| Nelson County | ||||
| Oliver County | ||||
| Pembina County | ||||
| Pierce County | ||||
| Ramsey County | ||||
| Ransom County | ||||
| Renville County | ||||
| Richland County | ||||
| Rolette County | ||||
| Sargent County | ||||
| Sheridan County | ||||
| Sioux County | ||||
| Slope County | ||||
| Stark County | ||||
| Steele County | ||||
| Stutsman County | ||||
| Towner County | ||||
| Traill County | ||||
| Walsh County | ||||
| Ward County | ||||
| Wells County | ||||
| Williams 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.
North Dakota—2008 Lead NAAQS
a Includes Indian Country located in each county or area, except as otherwise specified.
1 December 31, 2011 unless otherwise noted.
[55 FR 23933, June 13, 1990]
Editorial Note:
For Federal Register citations affecting § 81.335, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.