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)

Garland County had the highest share of days with good air quality (US EPA AQI) of 20 counties in 1996, at 100%. Crittenden County had the lowest, at 72.1%. The median was 98.2%. Source: EPA.

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Highest100Garland County
Lowest72.1Crittenden County
Median98.220 counties

Map of counties, 1996

Arkansas County: 91.1 %Ashley County: 96.7 %Clark County: 81.5 %Craighead County: 98.3 %Crittenden County: 72.1 %Garland County: 100 %Jefferson County: 100 %Marion County: 98.3 %Miller County: 100 %Montgomery County: 94.5 %Newton County: 73.4 %Ouachita County: 98.3 %Phillips County: 96.6 %Polk County: 98.2 %Pope County: 100 %Pulaski County: 78.1 %Sebastian County: 98.3 %Union County: 98.2 %Washington County: 98.3 %White County: 98.1 %
  • Under 89
  • 89 to 98
  • 98 to 99
  • 99 and over
  • No data
%, 1996. 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, 1996

Garland County: 100 %Garland County100Jefferson County: 100 %Jefferson County100Miller County: 100 %Miller County100Pope County: 100 %Pope County100Craighead County: 98.3 %Craighead County98.3Marion County: 98.3 %Marion County98.3Ouachita County: 98.3 %Ouachita County98.3Sebastian County: 98.3 %Sebastian County98.3Washington County: 98.3 %Washington County98.3Polk County: 98.2 %Polk County98.2Union County: 98.2 %Union County98.2White County: 98.1 %White County98.1Ashley County: 96.7 %Ashley County96.7Phillips County: 96.6 %Phillips County96.6Montgomery County: 94.5 %Montgomery County94.5Arkansas County: 91.1 %Arkansas County91.1Clark County: 81.5 %Clark County81.5Pulaski County: 78.1 %Pulaski County78.1Newton County: 73.4 %Newton County73.4Crittenden County: 72.1 %Crittenden County72.1Garland County: 100 %Garland County100Jefferson County: 100 %Jefferson County100Miller County: 100 %Miller County100Pope County: 100 %Pope County100Craighead County: 98.3 %Craighead County98.3Marion County: 98.3 %Marion County98.3Ouachita County: 98.3 %Ouachita County98.3Sebastian County: 98.3 %Sebastian County98.3Washington County: 98.3 %Washington County98.3Polk County: 98.2 %Polk County98.2Union County: 98.2 %Union County98.2White County: 98.1 %White County98.1Ashley County: 96.7 %Ashley County96.7Phillips County: 96.6 %Phillips County96.6Montgomery County: 94.5 %Montgomery County94.5Arkansas County: 91.1 %Arkansas County91.1Clark County: 81.5 %Clark County81.5Pulaski County: 78.1 %Pulaski County78.1Newton County: 73.4 %Newton County73.4Crittenden County: 72.1 %Crittenden County72.1
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties1996 (%)Change on 1995
1Garland County100+1.8 pts
1Jefferson County100+12.3 pts
1Miller County100+3.4 pts
1Pope County1000 pts
5Craighead County98.3+6.9 pts
5Marion County98.3-1.7 pts
5Ouachita County98.30 pts
5Sebastian County98.3+1.7 pts
5Washington County98.3-1.7 pts
10Polk County98.2+0.1 pts
10Union County98.20 pts
12White County98.1+1.8 pts
13Ashley County96.7+1.6 pts
14Phillips County96.6-1.5 pts
15Montgomery County94.5+10.7 pts
16Arkansas County91.1-0.1 pts
17Clark County81.5+7.1 pts
18Pulaski County78.1+8.2 pts
19Newton County73.4-1 pts
20Crittenden County72.1+2.5 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. 6 counties with data in other periods have no value for 1996 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), 1996) [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), 1996. 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=1996. 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), 1996. 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=1996.

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), 1996 [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=1996 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_arkansas_by_1996,
  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), 1996}},
  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=1996. 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), 1996
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=1996
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties?period=1996.
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)?

Garland County, with 100% in 1996, according to EPA.

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

Crittenden County, with 72.1% in 1996.

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. 6 counties have no value for 1996 and are not ranked.

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

Counties in Arkansas: more rankings