Data / Rankings / Share of days with good air quality (US EPA AQI) / Counties in Arkansas

Counties in Arkansas by share of days with good air quality (US EPA AQI)

Montgomery County had the highest share of days with good air quality (US EPA AQI) of 21 counties in 2002, at 87.7%. Pulaski County had the lowest, at 23.8%. The median was 41.1%. Source: EPA.

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Highest87.7Montgomery County
Lowest23.8Pulaski County
Median41.121 counties

Map of counties, 2002

Arkansas County: 43.1 %Ashley County: 41 %Clark County: 84.3 %Craighead County: 42.3 %Crittenden County: 64.9 %Faulkner County: 35.5 %Garland County: 51.9 %Jefferson County: 39.5 %Marion County: 61.2 %Miller County: 31 %Mississippi County: 40.5 %Montgomery County: 87.7 %Newton County: 72.1 %Phillips County: 43.2 %Polk County: 47.5 %Pope County: 35.8 %Pulaski County: 23.8 %Sebastian County: 38.4 %Union County: 30.4 %Washington County: 41.1 %White County: 35.9 %
  • Under 36
  • 36 to 41
  • 41 to 43
  • 43 to 61
  • 61 and over
  • No data
%, 2002. Hatched areas have no value for this period. Source: Invokely calculation with data from EPA. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2002

Montgomery County: 87.7 %Montgomery County87.7Clark County: 84.3 %Clark County84.3Newton County: 72.1 %Newton County72.1Crittenden County: 64.9 %Crittenden County64.9Marion County: 61.2 %Marion County61.2Garland County: 51.9 %Garland County51.9Polk County: 47.5 %Polk County47.5Phillips County: 43.2 %Phillips County43.2Arkansas County: 43.1 %Arkansas County43.1Craighead County: 42.3 %Craighead County42.3Washington County: 41.1 %Washington County41.1Ashley County: 41 %Ashley County41Mississippi County: 40.5 %Mississippi County40.5Jefferson County: 39.5 %Jefferson County39.5Sebastian County: 38.4 %Sebastian County38.4White County: 35.9 %White County35.9Pope County: 35.8 %Pope County35.8Faulkner County: 35.5 %Faulkner County35.5Miller County: 31 %Miller County31Union County: 30.4 %Union County30.4Pulaski County: 23.8 %Pulaski County23.8Montgomery County: 87.7 %Montgomery County87.7Clark County: 84.3 %Clark County84.3Newton County: 72.1 %Newton County72.1Crittenden County: 64.9 %Crittenden County64.9Marion County: 61.2 %Marion County61.2Garland County: 51.9 %Garland County51.9Polk County: 47.5 %Polk County47.5Phillips County: 43.2 %Phillips County43.2Arkansas County: 43.1 %Arkansas County43.1Craighead County: 42.3 %Craighead County42.3Washington County: 41.1 %Washington County41.1Ashley County: 41 %Ashley County41Mississippi County: 40.5 %Mississippi County40.5Jefferson County: 39.5 %Jefferson County39.5Sebastian County: 38.4 %Sebastian County38.4White County: 35.9 %White County35.9Pope County: 35.8 %Pope County35.8Faulkner County: 35.5 %Faulkner County35.5Miller County: 31 %Miller County31Union County: 30.4 %Union County30.4Pulaski County: 23.8 %Pulaski County23.8
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2002 (%)Change on 2001
1Montgomery County87.7-4.8 pts
2Clark County84.3+3.1 pts
3Newton County72.1+1.2 pts
4Crittenden County64.9+7.4 pts
5Marion County61.2+6.3 pts
6Garland County51.9+19.1 pts
7Polk County47.5+10.3 pts
8Phillips County43.2+10.2 pts
9Arkansas County43.1+2.3 pts
10Craighead County42.3+12.3 pts
11Washington County41.1+1.7 pts
12Ashley County41+11.2 pts
13Mississippi County40.5+7.9 pts
14Jefferson County39.5+13.1 pts
15Sebastian County38.4+13.9 pts
16White County35.9+2.6 pts
17Pope County35.8+2.2 pts
18Faulkner County35.5+1.1 pts
19Miller County31+0.8 pts
20Union County30.4+1.1 pts
21Pulaski County23.8+5.2 pts

Other periods

About this ranking

Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.

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: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts (Counties in Arkansas by share of days with good air quality (US EPA AQI), 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: good days as a share of days with an AQI, calculated with stored counts, Counties in Arkansas by share of days with good air quality (US EPA AQI), 2002. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties?period=2002. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Counties in Arkansas by share of days with good air quality (US EPA AQI), 2002. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties?period=2002.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Counties in Arkansas by share of days with good air quality (US EPA AQI), 2002 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/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: good days as a share of days with an AQI, calculated with stored counts: Counties in Arkansas by share of days with good air quality (US EPA AQI), 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/good-air-quality-days-share/arkansas-counties?period=2002. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts: Counties in Arkansas by share of days with good air quality (US EPA AQI), 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/good-air-quality-days-share/arkansas-counties?period=2002
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties?period=2002.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Rank Counties in Arkansas by share of days with good air quality (US EPA AQI) using official data, and cite the source.
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Questions

Which county has the highest share of days with good air quality (US EPA AQI)?

Montgomery County, with 87.7% in 2002, according to EPA.

Which county has the lowest share of days with good air quality (US EPA AQI)?

Pulaski County, with 23.8% 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: good days as a share of days with an AQI, calculated with stored counts. Retrieved 2026-10-12. 5 counties have no value for 2002 and are not ranked.

Share of days with good air quality (US EPA AQI): other rankings

Counties in Arkansas: more rankings