Data / Rankings / Median Air Quality Index (US EPA) / Counties in Arkansas

Counties in Arkansas by median Air Quality Index (US EPA)

Pulaski County had the highest median Air Quality Index (US EPA) of 21 counties in 2002, at 58. Montgomery County had the lowest, at 33. The median was 53. Source: the U.S. Environmental Protection Agency.

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Highest58Pulaski County
Lowest33Montgomery County
Median5321 counties

Map of counties, 2002

Arkansas County: 52 indexAshley County: 53 indexClark County: 36 indexCraighead County: 52 indexCrittenden County: 41 indexFaulkner County: 54 indexGarland County: 48 indexJefferson County: 55 indexMarion County: 47 indexMiller County: 55 indexMississippi County: 53 indexMontgomery County: 33 indexNewton County: 41 indexPhillips County: 53 indexPolk County: 52 indexPope County: 54 indexPulaski County: 58 indexSebastian County: 56 indexUnion County: 54 indexWashington County: 54 indexWhite County: 55 index
  • Under 47
  • 47 to 52
  • 52 to 54
  • 54 to 55
  • 55 and over
  • No data
index, 2002. Hatched areas have no value for this period. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2002

Pulaski County: 58 indexPulaski County58Sebastian County: 56 indexSebastian County56Jefferson County: 55 indexJefferson County55Miller County: 55 indexMiller County55White County: 55 indexWhite County55Faulkner County: 54 indexFaulkner County54Pope County: 54 indexPope County54Union County: 54 indexUnion County54Washington County: 54 indexWashington County54Ashley County: 53 indexAshley County53Mississippi County: 53 indexMississippi County53Phillips County: 53 indexPhillips County53Arkansas County: 52 indexArkansas County52Craighead County: 52 indexCraighead County52Polk County: 52 indexPolk County52Garland County: 48 indexGarland County48Marion County: 47 indexMarion County47Crittenden County: 41 indexCrittenden County41Newton County: 41 indexNewton County41Clark County: 36 indexClark County36Montgomery County: 33 indexMontgomery County33Pulaski County: 58 indexPulaski County58Sebastian County: 56 indexSebastian County56Jefferson County: 55 indexJefferson County55Miller County: 55 indexMiller County55White County: 55 indexWhite County55Faulkner County: 54 indexFaulkner County54Pope County: 54 indexPope County54Union County: 54 indexUnion County54Washington County: 54 indexWashington County54Ashley County: 53 indexAshley County53Mississippi County: 53 indexMississippi County53Phillips County: 53 indexPhillips County53Arkansas County: 52 indexArkansas County52Craighead County: 52 indexCraighead County52Polk County: 52 indexPolk County52Garland County: 48 indexGarland County48Marion County: 47 indexMarion County47Crittenden County: 41 indexCrittenden County41Newton County: 41 indexNewton County41Clark County: 36 indexClark County36Montgomery County: 33 indexMontgomery County33
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12.

Full ranking

RankCounties2002
index		Change on 2001
1Pulaski County58-5
2Sebastian County56-2
3Jefferson County55-4
3Miller County55-4
3White County55-1
6Faulkner County54-3
6Pope County54-2
6Union County54-2
6Washington County54-1
10Ashley County53-5
10Mississippi County53-3
10Phillips County53-3
13Arkansas County52-5
13Craighead County52-5
13Polk County52-3
16Garland County48-11
17Marion County47+5
18Crittenden County41-5
18Newton County41-2
20Clark County36-4
21Montgomery County330

Other periods

About this ranking

Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries.

More on how it is measured
  • The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide).
  • Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.

United States counties with air quality monitors only, about 1,000 of some 3,100 in recent years; a county without monitors has no value. The number of days with an AQI differs between counties because some monitors run only in the ozone season.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. 5 counties with data in other periods have no value for 2002 and are left out rather than filled from another source. Equal values share a rank.

How to cite

U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Environmental Protection Agency. (2026). EPA AirData annual AQI by county: median daily AQI (Counties in Arkansas by median Air Quality Index (US EPA), 2002) [Data set]. Retrieved October 12, 2026, from https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual

MLA 9

EPA AirData annual AQI by county: median daily AQI, Counties in Arkansas by median Air Quality Index (US EPA), 2002. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Counties in Arkansas by median Air Quality Index (US EPA), 2002. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Counties in Arkansas by median Air Quality Index (US EPA), 2002 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_arkansas_by_2002,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Counties in Arkansas by median Air Quality Index (US EPA), 2002}},
  year = {2026},
  howpublished = {Data set},
  url = {https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. https://aqs.epa.gov/aqsweb/airdata/download\_files.html\#Annual. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Environmental Protection Agency
TI  - EPA AirData annual AQI by county: median daily AQI: Counties in Arkansas by median Air Quality Index (US EPA), 2002
PY  - 2026
DA  - 2026/07/13
PB  - U.S. Environmental Protection Agency
DB  - Invokely
UR  - https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual
L2  - https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-air-quality-index/arkansas-counties?period=2002.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Rank Counties in Arkansas by median Air Quality Index (US EPA) using official data, and cite the source.
rank_places {"indicator":"aqi_median","level":"province","within":"Arkansas","limit":10}
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Questions

Which county has the highest median Air Quality Index (US EPA)?

Pulaski County, with 58 in 2002, according to the U.S. Environmental Protection Agency.

Which county has the lowest median Air Quality Index (US EPA)?

Montgomery County, with 33 in 2002.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12. 5 counties have no value for 2002 and are not ranked.

Median Air Quality Index (US EPA): other rankings

Counties in Arkansas: more rankings