Arkansas—1971 Sulfur Dioxide NAAQS

[Primary and Secondary]

Open Table
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]

Open Table
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.

1Includes 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.

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

Arkansas—Carbon Monoxide

Open Table
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

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

Arkansas—Ozone (1-Hour Standard)2

Open Table
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

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

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

Arkansas—PM-10

Open Table
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 PM2.5 NAAQS

[Primary and Secondary]

Open Table
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

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Arkansas—2012 Annual PM2.5 NAAQS

[Primary]

Open Table
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

1Includes areas of Indian country located in each county or area, except as otherwise specified.

2This date is April 15, 2015, unless otherwise noted.

Arkansas—1997 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Open Table
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

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after January 5, 2005, unless otherwise noted.

Arkansas—2006 24-Hour PM2.5 NAAQS

[Primary and Secondary]

Open Table
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

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 30 days after November 13, 2009, unless otherwise noted.

Arkansas—NO2 (1971 Annual Standard)

Open Table
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)

Open Table
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.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is 90 days after October 31, 2011, unless otherwise noted.

Arkansas—1997 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
Designated area Designation a 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

aIncludes Indian Country located in each county or area, except as otherwise specified.

1This date is June 15, 2004, unless otherwise noted.

2Effective April 23, 2010.

Arkansas—2008 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
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

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

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

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

Arkansas—2015 8-Hour Ozone NAAQS

[Primary and Secondary]

Open Table
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

1Includes 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.

2This date is January 16, 2018, unless otherwise noted.

Arkansas—2008 Lead NAAQS

Open Table
Designated area Designation for the 2008 NAAQSa
Date1 Type
Whole State Unclassifiable/Attainment.

aIncludes Indian Country located in each county or area, except as otherwise specified.

1December 31, 2011 unless otherwise noted.

[43 FR 8964, Mar. 3, 1978]


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