40 CFR 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 area 1 Designation

Date 2 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 4/12/2019 Attainment/Unclassifiable.

Izard County Attainment/Unclassifiable.

Jackson County Attainment/Unclassifiable.

Jefferson County 9/12/2016 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

Date 1 Type Date 1 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 PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 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 PM2.5 NAAQS

[Primary]

Designated area 1 Designation Classification

Date 2 Type Date 2 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 PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 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 PM2.5 NAAQS

[Primary and Secondary]

Designated area Designation a Classification

Date 1 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 Designation a

Date 1 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 Designation a Category/classification

Date 1 Type Date 1 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]

Designated area Designation Classification

Date 1 Type Date 1 Type

Memphis, TN-MS-AR 2 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 area 1 Designation Classification

Date 2 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 NAAQS a

Date 1 Type

Whole State Unclassifiable/Attainment.

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

1 December 31, 2011 unless otherwise noted.