§ 81.304 - Arkansas.

§ 81.304 Arkansas.

Arkansas - 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
AQCR 016				X
AQCR 017				X
AQCR 018				X
AQCR 019				X
AQCR 020				X
AQCR 021				X
AQCR 022				X

Arkansas - 2010 Sulfur Dioxide NAAQS

[Primary]

Designated area1	Designation
	Date2	Type
Arkansas County		Attainment/Unclassifiable.
Ashley County		Attainment/Unclassifiable.
Baxter County		Attainment/Unclassifiable.
Benton County		Attainment/Unclassifiable.
Boone County		Attainment/Unclassifiable.
Bradley County		Attainment/Unclassifiable.
Calhoun County		Attainment/Unclassifiable.
Carroll County		Attainment/Unclassifiable.
Chicot County		Attainment/Unclassifiable.
Clark County		Attainment/Unclassifiable.
Clay County		Attainment/Unclassifiable.
Cleburne County		Attainment/Unclassifiable.
Cleveland County		Attainment/Unclassifiable.
Columbia County		Attainment/Unclassifiable.
Conway County		Attainment/Unclassifiable.
Craighead County		Attainment/Unclassifiable.
Crawford County		Attainment/Unclassifiable.
Crittenden County		Attainment/Unclassifiable.
Cross County		Attainment/Unclassifiable.
Dallas County		Attainment/Unclassifiable.
Desha County		Attainment/Unclassifiable.
Drew County		Attainment/Unclassifiable.
Faulkner County		Attainment/Unclassifiable.
Franklin County		Attainment/Unclassifiable.
Fulton County		Attainment/Unclassifiable.
Garland County		Attainment/Unclassifiable.
Grant County		Attainment/Unclassifiable.
Greene County		Attainment/Unclassifiable.
Hempstead County		Attainment/Unclassifiable.
Hot Spring County		Attainment/Unclassifiable.
Howard County		Attainment/Unclassifiable.
Independence County	4/12/19	Attainment/Unclassifiable.
Izard County		Attainment/Unclassifiable.
Jackson County		Attainment/Unclassifiable.
Jefferson County	9/12/16	Attainment/Unclassifiable.
Johnson County		Attainment/Unclassifiable.
Lafayette County		Attainment/Unclassifiable.
Lawrence County		Attainment/Unclassifiable.
Lee County		Attainment/Unclassifiable.
Lincoln County		Attainment/Unclassifiable.
Little River County		Attainment/Unclassifiable.
Logan County		Attainment/Unclassifiable.
Lonoke County		Attainment/Unclassifiable.
Madison County		Attainment/Unclassifiable.
Marion County		Attainment/Unclassifiable.
Miller County		Attainment/Unclassifiable.
Mississippi County		Attainment/Unclassifiable.
Monroe County		Attainment/Unclassifiable.
Montgomery County		Attainment/Unclassifiable.
Nevada County		Attainment/Unclassifiable.
Newton County		Attainment/Unclassifiable.
Ouachita County		Attainment/Unclassifiable.
Perry County		Attainment/Unclassifiable.
Phillips County		Attainment/Unclassifiable.
Pike County		Attainment/Unclassifiable.
Poinsett County		Attainment/Unclassifiable.
Polk County		Attainment/Unclassifiable.
Pope County		Attainment/Unclassifiable.
Prairie County		Attainment/Unclassifiable.
Pulaski County		Attainment/Unclassifiable.
Randolph County		Attainment/Unclassifiable.
St. Francis County		Attainment/Unclassifiable.
Saline County		Attainment/Unclassifiable.
Scott County		Attainment/Unclassifiable.
Searcy County		Attainment/Unclassifiable.
Sebastian County		Attainment/Unclassifiable.
Sevier County		Attainment/Unclassifiable.
Sharp County		Attainment/Unclassifiable.
Stone County		Attainment/Unclassifiable.
Union County		Attainment/Unclassifiable.
Van Buren County		Attainment/Unclassifiable.
Washington County		Attainment/Unclassifiable.
White County		Attainment/Unclassifiable.
Woodruff County		Attainment/Unclassifiable.
Yell County		Attainment/Unclassifiable.

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.

Arkansas - Carbon Monoxide

Designated Area	Designation		Classification
	Date1	Type	Date1	Type
AQCR 016 Central Arkansas Intrastate		Unclassifiable/Attainment
Chicot County
Clark County
Cleveland County
Conway County
Dallas County
Desha County
Drew County
Faulkner County
Garland County
Grant County
Hot Spring County
Jefferson County
Lincoln County
Lonoke County
Perry County
Pope County
Pulaski County
Saline County
Yell County
AQCR 017 Metropolitan Fort Smith Interstate		Unclassifiable/Attainment
Benton County
Crawford County
Sebastian County
Washington County
AQCR 018 Metropolitan Memphis Interstate		Unclassifiable/Attainment
Crittenden County
AQCR 019 Monroe (Louisiana)-El Dorado Interstate		Unclassifiable/Attainment
Ashley County
Bradley County
Calhoun County
Nevada County
Ouachita County
Union County
AQCR 020 Northeast Arkansas Intrastate		Unclassifiable/Attainment
Arkansas County
Clay County
Craighead County
Cross County
Greene County
Independence County
Jackson County
Lawrence County
Lee County
Mississippi County
Monroe County
Phillips County
Poinsett County
Prairie County
Randolph County
Sharp County
St. Francis County
White County
Woodruff County
AQCR 021 Northwest Arkansas Intrastate		Unclassifiable/Attainment
Baxter County
Boone County
Carroll County
Cleburne County
Franklin County
Fulton County
Izard County
Johnson County
Logan County
Madison County
Marion County
Montgomery County
Newton County
Pike County
Polk County
Scott County
Searcy County
Stone County
Van Buren County
AQCR 022 Shreveport-Texarkana-Tyler Interstate		Unclassifiable/Attainment
Columbia County
Hempstead County
Howard County
Lafayette County
Little River County
Miller County
Sevier County

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

Arkansas - Ozone (1-Hour Standard)²

Designated area	Designation		Classification
	Date1	Type	Date1	Type
AQCR 016 Central Arkansas Intrastate (part) Pulaski County		Unclassifiable/Attainment
AQCR 016 Central Arkansas Intrastate (Remainder of)		Unclassifiable/Attainment
Chicot County
Clark County
Cleveland County
Conway County
Dallas County
Desha County
Drew County
Faulkner County
Garland County
Grant County
Hot Spring County
Jefferson County
Lincoln County
Lonoke County
Perry County
Pope County
Saline County
Yell County
AQCR 017 Metropolitan Fort Smith Interstate		Unclassifiable/Attainment
Benton County
Crawford County
Sebastian County
Washington County
AQCR 018 Metropolitan Memphis Interstate		Unclassifiable/Attainment
Crittenden County
AQCR 019 Monroe-El Dorado Interstate		Unclassifiable/Attainment
Ashley County
Bradley County
Calhoun County
Nevada County
Ouachita County
Union County
AQCR 020 Northeast Arkansas Intrastate		Unclassifiable/Attainment
Arkansas County
Clay County
Craighead County
Cross County
Greene County
Independence County
Jackson County
Lawrence County
Lee County
Mississippi County
Monroe County
Phillips County
Poinsett County
Prairie County
Randolph County
Sharp County
St. Francis County
White County
Woodruff County
AQCR 021 Northwest Arkansas Intrastate		Unclassifiable/Attainment
Baxter County
Boone County
Carroll County
Cleburne County
Franklin County
Fulton County
Izard County
Johnson County
Logan County
Madison County
Marion County
Montgomery County
Newton County
Pike County
Polk County
Scott County
Searcy County
Stone County
Van Buren County
AQCR 022 Shreveport-Texarkana-Tyler Interstate		Unclassifiable/Attainment
Columbia County
Hempstead County
Howard County
Lafayette County
Little River County
Miller County
Sevier 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 Arkansas.

Arkansas - PM-10

Designated area	Designation		Classification
	Date	Type	Date	Type
AQCR 016 Central Arkansas Intrastate		Unclassifiable		Unclassifiable.
AQCR 017 Metropolitan Fort Smith Interstate		Unclassifiable		Unclassifiable.
AQCR 018 Metropolitan Memphis Intrastate		Unclassifiable		Unclassifiable.
AQCR 019 Monroe (Louisiana)-El Dorado Interstate		Unclassifiable		Unclassifiable.
AQCR 020 Northeast Arkansas Intrastate		Unclassifiable		Unclassifiable.
AQCR 021 Northwest Arkansas Intrastate		Unclassifiable		Unclassifiable.
AQCR 022 Shreveport-Texarkana-Tyler Interstate		Unclassifiable		Unclassifiable.

Arkansas - 1997 Annual PM_2.5 NAAQS

[Primary and Secondary]

Designated area	Designationa		Classification
	Date1	Type	Date	Type
AQCR 016 Central Arkansas Intrastate:
Chicot County		Unclassifiable/Attainment
Clark County		Unclassifiable/Attainment
Cleveland County		Unclassifiable/Attainment
Conway County		Unclassifiable/Attainment
Dallas County		Unclassifiable/Attainment
Desha County		Unclassifiable/Attainment
Drew County		Unclassifiable/Attainment
Faulkner County		Unclassifiable/Attainment
Garland County		Unclassifiable/Attainment
Grant County		Unclassifiable/Attainment
Hot Spring County		Unclassifiable/Attainment
Jefferson County		Unclassifiable/Attainment
Lincoln County		Unclassifiable/Attainment
Lonoke County		Unclassifiable/Attainment
Perry County		Unclassifiable/Attainment
Pope County		Unclassifiable/Attainment
Pulaski County		Unclassifiable/Attainment
Saline County		Unclassifiable/Attainment
Yell County		Unclassifiable/Attainment
AQCR 017 Metropolitan Fort Smith Interstate:
Benton County		Unclassifiable/Attainment
Crawford County		Unclassifiable/Attainment
Sebastian County		Unclassifiable/Attainment
Washington County		Unclassifiable/Attainment
AQCR 019 Monroe-El Dorado Interstate:
Ashley County		Unclassifiable/Attainment
Bradley County		Unclassifiable/Attainment
Calhoun County		Unclassifiable/Attainment
Nevada County		Unclassifiable/Attainment
Ouachita County		Unclassifiable/Attainment
Union County		Unclassifiable/Attainment
AQCR 020 Northeast Arkansas Intrastate:
Arkansas County		Unclassifiable/Attainment
Clay County		Unclassifiable/Attainment
Craighead County		Unclassifiable/Attainment
Cross County		Unclassifiable/Attainment
Greene County		Unclassifiable/Attainment
Independence County		Unclassifiable/Attainment
Jackson County		Unclassifiable/Attainment
Lawrence County		Unclassifiable/Attainment
Lee County		Unclassifiable/Attainment
Mississippi County		Unclassifiable/Attainment
Monroe County		Unclassifiable/Attainment
Phillips County		Unclassifiable/Attainment
Poinsett County		Unclassifiable/Attainment
Prairie County		Unclassifiable/Attainment
Randolph County		Unclassifiable/Attainment
St. Francis County		Unclassifiable/Attainment
Sharp County		Unclassifiable/Attainment
White County		Unclassifiable/Attainment
Woodruff County		Unclassifiable/Attainment
AQCR 021 Northwest Arkansas Intrastate:
Baxter County		Unclassifiable/Attainment
Boone County		Unclassifiable/Attainment
Carroll County		Unclassifiable/Attainment
Cleburne County		Unclassifiable/Attainment
Franklin County		Unclassifiable/Attainment
Fulton County		Unclassifiable/Attainment
Izard County		Unclassifiable/Attainment
Johnson County		Unclassifiable/Attainment
Logan County		Unclassifiable/Attainment
Madison County		Unclassifiable/Attainment
Marion County		Unclassifiable/Attainment
Montgomery County		Unclassifiable/Attainment
Newton County		Unclassifiable/Attainment
Pike County		Unclassifiable/Attainment
Polk County		Unclassifiable/Attainment
Scott County		Unclassifiable/Attainment
Searcy County		Unclassifiable/Attainment
Stone County		Unclassifiable/Attainment
Van Buren County		Unclassifiable/Attainment
AQCR 022 Shreveport-Texarkana-Tyler Interstate:
Columbia County		Unclassifiable/Attainment
Hempstead County		Unclassifiable/Attainment
Howard County		Unclassifiable/Attainment
Lafayette County		Unclassifiable/Attainment
Little River County		Unclassifiable/Attainment
Miller County		Unclassifiable/Attainment
Sevier County		Unclassifiable/Attainment
Memphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):
Crittenden 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.

Arkansas - 2012 Annual PM_2.5 NAAQS

[Primary]

Designated area1	Designation		Classification
	Date2	Type	Date2	Type
AQCR 016 Central Arkansas Intrastate:
Chicot County		Unclassifiable/Attainment
Clark County		Unclassifiable/Attainment
Cleveland County		Unclassifiable/Attainment
Conway County		Unclassifiable/Attainment
Dallas County		Unclassifiable/Attainment
Desha County		Unclassifiable/Attainment
Drew County		Unclassifiable/Attainment
Faulkner County		Unclassifiable/Attainment
Garland County		Unclassifiable/Attainment
Grant County		Unclassifiable/Attainment
Hot Spring County		Unclassifiable/Attainment
Jefferson County		Unclassifiable/Attainment
Lincoln County		Unclassifiable/Attainment
Lonoke County		Unclassifiable/Attainment
Perry County		Unclassifiable/Attainment
Pope County		Unclassifiable/Attainment
Pulaski County		Unclassifiable/Attainment
Saline County		Unclassifiable/Attainment
Yell County		Unclassifiable/Attainment
AQCR 017 Metropolitan Fort Smith Interstate:
Benton County		Unclassifiable/Attainment
Crawford County		Unclassifiable/Attainment
Sebastian County		Unclassifiable/Attainment
Washington County		Unclassifiable/Attainment
AQCR 018 Metropolitan Memphis Interstate: Crittenden County		Unclassifiable/Attainment
AQCR 019 Monroe-El Dorado Interstate:
Ashley County		Unclassifiable/Attainment
Bradley County		Unclassifiable/Attainment
Calhoun County		Unclassifiable/Attainment
Nevada County		Unclassifiable/Attainment
Ouachita County		Unclassifiable/Attainment
Union County		Unclassifiable/Attainment
AQCR 020 Northeast Arkansas Intrastate:
Arkansas County		Unclassifiable/Attainment
Clay County		Unclassifiable/Attainment
Craighead County		Unclassifiable/Attainment
Cross County		Unclassifiable/Attainment
Greene County		Unclassifiable/Attainment
Independence County		Unclassifiable/Attainment
Jackson County		Unclassifiable/Attainment
Lawrence County		Unclassifiable/Attainment
Lee County		Unclassifiable/Attainment
Mississippi County		Unclassifiable/Attainment
Monroe County		Unclassifiable/Attainment
Phillips County		Unclassifiable/Attainment
Poinsett County		Unclassifiable/Attainment
Prairie County		Unclassifiable/Attainment
Randolph County		Unclassifiable/Attainment
St. Francis County		Unclassifiable/Attainment
Sharp County		Unclassifiable/Attainment
White County		Unclassifiable/Attainment
Woodruff County		Unclassifiable/Attainment
AQCR 021 Northwest Arkansas Intrastate:
Baxter County		Unclassifiable/Attainment
Boone County		Unclassifiable/Attainment
Carroll County		Unclassifiable/Attainment
Cleburne County		Unclassifiable/Attainment
Franklin County		Unclassifiable/Attainment
Fulton County		Unclassifiable/Attainment
Izard County		Unclassifiable/Attainment
Johnson County		Unclassifiable/Attainment
Logan County		Unclassifiable/Attainment
Madison County		Unclassifiable/Attainment
Marion County		Unclassifiable/Attainment
Montgomery County		Unclassifiable/Attainment
Newton County		Unclassifiable/Attainment
Pike County		Unclassifiable/Attainment
Polk County		Unclassifiable/Attainment
Scott County		Unclassifiable/Attainment
Searcy County		Unclassifiable/Attainment
Stone County		Unclassifiable/Attainment
Van Buren County		Unclassifiable/Attainment
AQCR 022 Shreveport-Texarkana-Tyler Interstate:
Columbia County		Unclassifiable/Attainment
Hempstead County		Unclassifiable/Attainment
Howard County		Unclassifiable/Attainment
Lafayette County		Unclassifiable/Attainment
Little River County		Unclassifiable/Attainment
Miller County		Unclassifiable/Attainment
Sevier 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.

Arkansas - 1997 24-Hour PM_2.5 NAAQS

[Primary and Secondary]

Designated area	Designationa		Classification
	Date1	Type	Date	Type
AQCR 016 Central Arkansas Intrastate:
Chicot County		Unclassifiable/Attainment
Clark County		Unclassifiable/Attainment
Cleveland County		Unclassifiable/Attainment
Conway County		Unclassifiable/Attainment
Dallas County		Unclassifiable/Attainment
Desha County		Unclassifiable/Attainment
Drew County		Unclassifiable/Attainment
Faulkner County		Unclassifiable/Attainment
Garland County		Unclassifiable/Attainment
Grant County		Unclassifiable/Attainment
Hot Spring County		Unclassifiable/Attainment
Jefferson County		Unclassifiable/Attainment
Lincoln County		Unclassifiable/Attainment
Lonoke County		Unclassifiable/Attainment
Perry County		Unclassifiable/Attainment
Pope County		Unclassifiable/Attainment
Pulaski County		Unclassifiable/Attainment
Saline County		Unclassifiable/Attainment
Yell County		Unclassifiable/Attainment
AQCR 017 Metropolitan Fort Smith Interstate:
Benton County		Unclassifiable/Attainment
Crawford County		Unclassifiable/Attainment
Sebastian County		Unclassifiable/Attainment
Washington County		Unclassifiable/Attainment
AQCR 019 Monroe-El Dorado Interstate:
Ashley County		Unclassifiable/Attainment
Bradley County		Unclassifiable/Attainment
Calhoun County		Unclassifiable/Attainment
Nevada County		Unclassifiable/Attainment
Ouachita County		Unclassifiable/Attainment
Union County		Unclassifiable/Attainment
AQCR 020 Northeast Arkansas Intrastate:
Arkansas County		Unclassifiable/Attainment
Clay County		Unclassifiable/Attainment
Craighead County		Unclassifiable/Attainment
Cross County		Unclassifiable/Attainment
Greene County		Unclassifiable/Attainment
Independence County		Unclassifiable/Attainment
Jackson County		Unclassifiable/Attainment
Lawrence County		Unclassifiable/Attainment
Lee County		Unclassifiable/Attainment
Mississippi County		Unclassifiable/Attainment
Monroe County		Unclassifiable/Attainment
Phillips County		Unclassifiable/Attainment
Poinsett County		Unclassifiable/Attainment
Prairie County		Unclassifiable/Attainment
Randolph County		Unclassifiable/Attainment
St. Francis County		Unclassifiable/Attainment
Sharp County		Unclassifiable/Attainment
White County		Unclassifiable/Attainment
Woodruff County		Unclassifiable/Attainment
AQCR 021 Northwest Arkansas Intrastate:
Baxter County		Unclassifiable/Attainment
Boone County		Unclassifiable/Attainment
Carroll County		Unclassifiable/Attainment
Cleburne County		Unclassifiable/Attainment
Franklin County		Unclassifiable/Attainment
Fulton County		Unclassifiable/Attainment
Izard County		Unclassifiable/Attainment
Johnson County		Unclassifiable/Attainment
Logan County		Unclassifiable/Attainment
Madison County		Unclassifiable/Attainment
Marion County		Unclassifiable/Attainment
Montgomery County		Unclassifiable/Attainment
Newton County		Unclassifiable/Attainment
Pike County		Unclassifiable/Attainment
Polk County		Unclassifiable/Attainment
Scott County		Unclassifiable/Attainment
Searcy County		Unclassifiable/Attainment
Stone County		Unclassifiable/Attainment
Van Buren County		Unclassifiable/Attainment
AQCR 022 Shreveport-Texarkana-Tyler Interstate:
Columbia County		Unclassifiable/Attainment
Hempstead County		Unclassifiable/Attainment
Howard County		Unclassifiable/Attainment
Lafayette County		Unclassifiable/Attainment
Little River County		Unclassifiable/Attainment
Miller County		Unclassifiable/Attainment
Sevier County		Unclassifiable/Attainment
Memphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):
Crittenden 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.

Arkansas - 2006 24-Hour PM_2.5 NAAQS

[Primary and Secondary]

Designated area	Designationa		Classification
	Date1	Type	Date	Type
AQCR 016 Central Arkansas Intrastate:
Chicot County		Unclassifiable/Attainment
Clark County		Unclassifiable/Attainment
Cleveland County		Unclassifiable/Attainment
Conway County		Unclassifiable/Attainment
Dallas County		Unclassifiable/Attainment
Desha County		Unclassifiable/Attainment
Drew County		Unclassifiable/Attainment
Faulkner County		Unclassifiable/Attainment
Garland County		Unclassifiable/Attainment
Grant County		Unclassifiable/Attainment
Hot Spring County		Unclassifiable/Attainment
Jefferson County		Unclassifiable/Attainment
Lincoln County		Unclassifiable/Attainment
Lonoke County		Unclassifiable/Attainment
Perry County		Unclassifiable/Attainment
Pope County		Unclassifiable/Attainment
Pulaski County		Unclassifiable/Attainment
Saline County		Unclassifiable/Attainment
Yell County		Unclassifiable/Attainment
AQCR 017 Metropolitan Fort Smith Interstate:
Benton County		Unclassifiable/Attainment
Crawford County		Unclassifiable/Attainment
Sebastian County		Unclassifiable/Attainment
Washington County		Unclassifiable/Attainment
AQCR 019 Monroe-El Dorado Interstate:
Ashley County		Unclassifiable/Attainment
Bradley County		Unclassifiable/Attainment
Calhoun County		Unclassifiable/Attainment
Nevada County		Unclassifiable/Attainment
Ouachita County		Unclassifiable/Attainment
Union County		Unclassifiable/Attainment
AQCR 020 Northeast Arkansas Intrastate:
Arkansas County		Unclassifiable/Attainment
Clay County		Unclassifiable/Attainment
Craighead County		Unclassifiable/Attainment
Cross County		Unclassifiable/Attainment
Greene County		Unclassifiable/Attainment
Independence County		Unclassifiable/Attainment
Jackson County		Unclassifiable/Attainment
Lawrence County		Unclassifiable/Attainment
Lee County		Unclassifiable/Attainment
Mississippi County		Unclassifiable/Attainment
Monroe County		Unclassifiable/Attainment
Phillips County		Unclassifiable/Attainment
Poinsett County		Unclassifiable/Attainment
Prairie County		Unclassifiable/Attainment
Randolph County		Unclassifiable/Attainment
St. Francis County		Unclassifiable/Attainment
Sharp County		Unclassifiable/Attainment
White County		Unclassifiable/Attainment
Woodruff County		Unclassifiable/Attainment
AQCR 021 Northwest Arkansas Intrastate:
Baxter County		Unclassifiable/Attainment
Boone County		Unclassifiable/Attainment
Carroll County		Unclassifiable/Attainment
Cleburne County		Unclassifiable/Attainment
Franklin County		Unclassifiable/Attainment
Fulton County		Unclassifiable/Attainment
Izard County		Unclassifiable/Attainment
Johnson County		Unclassifiable/Attainment
Logan County		Unclassifiable/Attainment
Madison County		Unclassifiable/Attainment
Marion County		Unclassifiable/Attainment
Montgomery County		Unclassifiable/Attainment
Newton County		Unclassifiable/Attainment
Pike County		Unclassifiable/Attainment
Polk County		Unclassifiable/Attainment
Scott County		Unclassifiable/Attainment
Searcy County		Unclassifiable/Attainment
Stone County		Unclassifiable/Attainment
Van Buren County		Unclassifiable/Attainment
AQCR 022 Shreveport-Texarkana-Tyler Interstate:
Columbia County		Unclassifiable/Attainment
Hempstead County		Unclassifiable/Attainment
Howard County		Unclassifiable/Attainment
Lafayette County		Unclassifiable/Attainment
Little River County		Unclassifiable/Attainment
Miller County		Unclassifiable/Attainment
Sevier County		Unclassifiable/Attainment
Memphis, TN-AR: (AQCR 018 Metropolitan Memphis Interstate):
Crittenden 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.

Arkansas - NO₂ (1971 Annual Standard)

Designated area	Does not meet primary standards	Cannot be classified or better than national standards
AQCR 016		X
AQCR 017		X
AQCR 018		X
AQCR 019		X
AQCR 020		X
AQCR 021		X
AQCR 022		X

Arkansas - NO₂ (2010 1-Hour Standard)

Designated area	Designationa
	Date1	Type
Ashley County		Unclassifiable/Attainment.
Arkansas County		Unclassifiable/Attainment.
Baxter County		Unclassifiable/Attainment.
Benton County		Unclassifiable/Attainment.
Boone County		Unclassifiable/Attainment.
Bradley County		Unclassifiable/Attainment.
Calhoun County		Unclassifiable/Attainment.
Carroll County		Unclassifiable/Attainment.
Chicot County		Unclassifiable/Attainment.
Clark County		Unclassifiable/Attainment.
Clay County		Unclassifiable/Attainment.
Cleburne County		Unclassifiable/Attainment.
Cleveland County		Unclassifiable/Attainment.
Columbia County		Unclassifiable/Attainment.
Conway County		Unclassifiable/Attainment.
Craighead County		Unclassifiable/Attainment.
Crawford County		Unclassifiable/Attainment.
Crittenden County		Unclassifiable/Attainment.
Cross County		Unclassifiable/Attainment.
Dallas County		Unclassifiable/Attainment.
Desha County		Unclassifiable/Attainment.
Drew County		Unclassifiable/Attainment.
Faulkner County		Unclassifiable/Attainment.
Franklin County		Unclassifiable/Attainment.
Fulton County		Unclassifiable/Attainment.
Garland County.		Unclassifiable/Attainment.
Grant County		Unclassifiable/Attainment.
Greene County		Unclassifiable/Attainment.
Hempstead County		Unclassifiable/Attainment.
Hot Spring County		Unclassifiable/Attainment.
Howard County.		Unclassifiable/Attainment.
Independence County		Unclassifiable/Attainment.
Izard Count		Unclassifiable/Attainment.
Jackson County		Unclassifiable/Attainment.
Jefferson County.		Unclassifiable/Attainment.
Johnson County		Unclassifiable/Attainment.
Lafayette County		Unclassifiable/Attainment.
Lawrence County		Unclassifiable/Attainment.
Lee County		Unclassifiable/Attainment.
Lincoln County		Unclassifiable/Attainment.
Little River County		Unclassifiable/Attainment.
Logan County		Unclassifiable/Attainment.
Lonoke County		Unclassifiable/Attainment.
Madison County		Unclassifiable/Attainment.
Marion County		Unclassifiable/Attainment.
Miller County		Unclassifiable/Attainment.
Mississippi County		Unclassifiable/Attainment.
Monroe County		Unclassifiable/Attainment.
Montgomery County		Unclassifiable/Attainment.
Nevada County		Unclassifiable/Attainment.
Newton County		Unclassifiable/Attainment.
Ouachita County		Unclassifiable/Attainment.
Perry County		Unclassifiable/Attainment.
Phillips County		Unclassifiable/Attainment.
Pike County		Unclassifiable/Attainment.
Poinsett County		Unclassifiable/Attainment.
Polk County		Unclassifiable/Attainment.
Pope County		Unclassifiable/Attainment.
Prairie County		Unclassifiable/Attainment.
Pulaski County		Unclassifiable/Attainment.
Randolph County		Unclassifiable/Attainment.
St. Francis County		Unclassifiable/Attainment.
Saline County		Unclassifiable/Attainment.
Scott County		Unclassifiable/Attainment.
Searcy County		Unclassifiable/Attainment.
Sebastian County		Unclassifiable/Attainment
Sevier County		Unclassifiable/Attainment.
Sharp County		Unclassifiable/Attainment.
Stone County		Unclassifiable/Attainment.
Union County		Unclassifiable/Attainment.
Van Buren County		Unclassifiable/Attainment.
Washington County		Unclassifiable/Attainment.
White County		Unclassifiable/Attainment.
Woodruff County		Unclassifiable/Attainment.
Yell 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.

Arkansas - 1997 8-Hour Ozone NAAQS

([Primary and Secondary) ]

Designated area	Designationa		Category/classification
	Date1	Type	Date1	Type
Memphis TN-AR: (AQCR Metropolitan Memphis Interstate) Crittenden County		Attainment	(2)
AQCR 016 Central Arkansas Intrastate (part)		Unclassifiable/Attainment
Pulaski County
AQCR 016 Central Arkansas Intrastate (remainder of)		Unclassifiable/Attainment
Chicot County
Clark County
Cleveland County
Conway County
Dallas County
Desha County
Drew County
Faulkner County
Garland County
Grant County
Hot Spring County
Jefferson County
Lincoln County
Lonoke County
Perry County
Pope County
Saline County
Yell County
AQCR 017 Metropolitan Fort Smith Interstate		Unclassifiable/Attainment
Benton County
Crawford County
Sebastian County
Washington County
AQCR 019 Monroe-El Dorado Interstate		Unclassifiable/Attainment
Ashley County
Bradley County
Calhoun County
Nevada County
Ouachita County
Union County
AQCR 020 Northeast Arkansas Intrastate		Unclassifiable/Attainment
Arkansas County
Clay County
Craighead County
Cross County
Greene County
Independence County
Jackson County
Lawrence County
Lee County
Mississippi County
Monroe County
Phillips County
Poinsett County
Prairie County
Randolph County
St. Francis County
Sharp County
White County
Woodruff County
AQCR 021 Northwest Arkansas Intrastate		Unclassifiable/Attainment
Baxter County
Boone County
Carroll County
Cleburne County
Franklin County
Fulton County
Izard County
Johnson County
Logan County
Madison County
Marion County
Montgomery County
Newton County
Pike County
Polk County
Scott County
Searcy County
Stone County
Van Buren County
AQCR 022 Shreveport-Texarkana-Tyler Interstate.		Unclassifiable/Attainment
Columbia County
Hempstead County
Howard County
Lafayette County
Little River County
Miller County
Sevier 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.

² Effective April 23, 2010.

Arkansas - 2008 8-Hour Ozone NAAQS

([Primary and secondary) Secondary]

Designated area	Designation		Classification
	Date1	Type	Date1	Type
Memphis, TN-MS-AR2 Crittenden County	4/25/2016	Attainment
Rest of State:3
Ashley County		Unclassifiable/Attainment
Arkansas County		Unclassifiable/Attainment
Baxter County		Unclassifiable/Attainment
Benton County		Unclassifiable/Attainment
Boone County		Unclassifiable/Attainment
Bradley County		Unclassifiable/Attainment
Calhoun County		Unclassifiable/Attainment
Carroll County		Unclassifiable/Attainment
Chicot County		Unclassifiable/Attainment
Clark County		Unclassifiable/Attainment
Clay County		Unclassifiable/Attainment
Cleburne County		Unclassifiable/Attainment
Cleveland County		Unclassifiable/Attainment
Columbia County		Unclassifiable/Attainment
Conway County		Unclassifiable/Attainment
Craighead County		Unclassifiable/Attainment
Crawford County		Unclassifiable/Attainment
Cross County		Unclassifiable/Attainment
Dallas County		Unclassifiable/Attainment
Desha County		Unclassifiable/Attainment
Drew County		Unclassifiable/Attainment
Faulkner County		Unclassifiable/Attainment
Franklin County		Unclassifiable/Attainment
Fulton County		Unclassifiable/Attainment
Garland County		Unclassifiable/Attainment
Grant County		Unclassifiable/Attainment
Greene County		Unclassifiable/Attainment
Hempstead County		Unclassifiable/Attainment
Hot Spring County		Unclassifiable/Attainment
Howard County		Unclassifiable/Attainment
Independence County		Unclassifiable/Attainment
Izard County		Unclassifiable/Attainment
Jackson County		Unclassifiable/Attainment
Jefferson County		Unclassifiable/Attainment
Johnson County		Unclassifiable/Attainment
Lafayette County		Unclassifiable/Attainment
Lawrence County		Unclassifiable/Attainment
Lee County		Unclassifiable/Attainment
Lincoln County		Unclassifiable/Attainment
Little River County		Unclassifiable/Attainment
Logan County		Unclassifiable/Attainment
Lonoke County		Unclassifiable/Attainment
Madison County		Unclassifiable/Attainment
Marion County		Unclassifiable/Attainment
Miller County		Unclassifiable/Attainment
Mississippi County		Unclassifiable/Attainment
Monroe County		Unclassifiable/Attainment
Montgomery County		Unclassifiable/Attainment
Nevada County		Unclassifiable/Attainment
Newton County		Unclassifiable/Attainment
Ouachita County		Unclassifiable/Attainment
Perry County		Unclassifiable/Attainment
Phillips County		Unclassifiable/Attainment
Pike County		Unclassifiable/Attainment
Poinsett County		Unclassifiable/Attainment
Polk County		Unclassifiable/Attainment
Pope County		Unclassifiable/Attainment
Prairie County		Unclassifiable/Attainment
Pulaski County		Unclassifiable/Attainment
Randolph County		Unclassifiable/Attainment
St. Francis County		Unclassifiable/Attainment
Saline County		Unclassifiable/Attainment
Scott County		Unclassifiable/Attainment
Searcy County		Unclassifiable/Attainment
Sebastian County		Unclassifiable/Attainment
Sevier County		Unclassifiable/Attainment
Sharp County		Unclassifiable/Attainment
Stone County		Unclassifiable/Attainment
Union County		Unclassifiable/Attainment
Van Buren County		Unclassifiable/Attainment
Washington County		Unclassifiable/Attainment
White County		Unclassifiable/Attainment
Woodruff County		Unclassifiable/Attainment
Yell County		Unclassifiable/Attainment

¹ This date is July 20, 2012, unless otherwise noted.

² Excludes Indian country located in each area, unless otherwise noted.

³ Includes any Indian country in each county or area, unless otherwise specified.

Arkansas - 2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Designated area1	Designation		Classification
	Date2	Type	Date	Type
Arkansas County		Attainment/Unclassifiable
Ashley County		Attainment/Unclassifiable
Baxter County		Attainment/Unclassifiable
Benton County		Attainment/Unclassifiable
Boone County		Attainment/Unclassifiable
Bradley County		Attainment/Unclassifiable
Calhoun County		Attainment/Unclassifiable
Carroll County		Attainment/Unclassifiable
Chicot County		Attainment/Unclassifiable
Clark County		Attainment/Unclassifiable
Clay County		Attainment/Unclassifiable
Cleburne County		Attainment/Unclassifiable
Cleveland County		Attainment/Unclassifiable
Columbia County		Attainment/Unclassifiable
Conway County		Attainment/Unclassifiable
Craighead County		Attainment/Unclassifiable
Crawford County		Attainment/Unclassifiable
Crittenden County		Attainment/Unclassifiable
Cross County		Attainment/Unclassifiable
Dallas County		Attainment/Unclassifiable
Desha County		Attainment/Unclassifiable
Drew County		Attainment/Unclassifiable
Faulkner County		Attainment/Unclassifiable
Franklin County		Attainment/Unclassifiable
Fulton County		Attainment/Unclassifiable
Garland County		Attainment/Unclassifiable
Grant County		Attainment/Unclassifiable
Greene County		Attainment/Unclassifiable
Hempstead County		Attainment/Unclassifiable
Hot Spring County		Attainment/Unclassifiable
Howard County		Attainment/Unclassifiable
Independence County		Attainment/Unclassifiable
Izard County		Attainment/Unclassifiable
Jackson County		Attainment/Unclassifiable
Jefferson County		Attainment/Unclassifiable
Johnson County		Attainment/Unclassifiable
Lafayette County		Attainment/Unclassifiable
Lawrence County		Attainment/Unclassifiable
Lee County		Attainment/Unclassifiable
Lincoln County		Attainment/Unclassifiable
Little River County		Attainment/Unclassifiable
Logan County		Attainment/Unclassifiable
Lonoke County		Attainment/Unclassifiable
Madison County		Attainment/Unclassifiable
Marion County		Attainment/Unclassifiable
Miller County		Attainment/Unclassifiable
Mississippi County		Attainment/Unclassifiable
Monroe County		Attainment/Unclassifiable
Montgomery County		Attainment/Unclassifiable
Nevada County		Attainment/Unclassifiable
Newton County		Attainment/Unclassifiable
Ouachita County		Attainment/Unclassifiable
Perry County		Attainment/Unclassifiable
Phillips County		Attainment/Unclassifiable
Pike County		Attainment/Unclassifiable
Poinsett County		Attainment/Unclassifiable
Polk County		Attainment/Unclassifiable
Pope County		Attainment/Unclassifiable
Prairie County		Attainment/Unclassifiable
Pulaski County		Attainment/Unclassifiable
Randolph County		Attainment/Unclassifiable
St. Francis County		Attainment/Unclassifiable
Saline County		Attainment/Unclassifiable
Scott County		Attainment/Unclassifiable
Searcy County		Attainment/Unclassifiable
Sebastian County		Attainment/Unclassifiable
Sevier County		Attainment/Unclassifiable
Sharp County		Attainment/Unclassifiable
Stone County		Attainment/Unclassifiable
Union County		Attainment/Unclassifiable
Van Buren County		Attainment/Unclassifiable
Washington County		Attainment/Unclassifiable
White County		Attainment/Unclassifiable
Woodruff County		Attainment/Unclassifiable
Yell County		Attainment/Unclassifiable

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.

Arkansas - 2008 Lead NAAQS

Designated area	Designation for the 2008 NAAQSa
	Date1	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

Editorial Note:

For Federal Register citations affecting § 81.304, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at www.govinfo.gov.