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)

Pope County had the highest share of days with good air quality (US EPA AQI) of 20 counties in 1997, at 100%. Newton County had the lowest, at 67.4%. The median was 96.7%. Source: EPA.

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Highest100Pope County
Lowest67.4Newton County
Median96.720 counties

Map of counties, 1997

Arkansas County: 95 %Ashley County: 96.7 %Clark County: 77.3 %Craighead County: 96.7 %Crittenden County: 71.4 %Garland County: 98.2 %Jefferson County: 96.4 %Marion County: 98.1 %Miller County: 95 %Montgomery County: 91.2 %Newton County: 67.4 %Ouachita County: 98.2 %Phillips County: 98.2 %Polk County: 98.1 %Pope County: 100 %Pulaski County: 69.3 %Sebastian County: 96.6 %Union County: 98.1 %Washington County: 100 %White County: 96.4 %
  • Under 88
  • 88 to 96
  • 96 to 97
  • 97 to 98
  • 98 and over
  • No data
%, 1997. 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, 1997

Pope County: 100 %Pope County100Washington County: 100 %Washington County100Garland County: 98.2 %Garland County98.2Ouachita County: 98.2 %Ouachita County98.2Phillips County: 98.2 %Phillips County98.2Marion County: 98.1 %Marion County98.1Polk County: 98.1 %Polk County98.1Union County: 98.1 %Union County98.1Ashley County: 96.7 %Ashley County96.7Craighead County: 96.7 %Craighead County96.7Sebastian County: 96.6 %Sebastian County96.6Jefferson County: 96.4 %Jefferson County96.4White County: 96.4 %White County96.4Arkansas County: 95 %Arkansas County95Miller County: 95 %Miller County95Montgomery County: 91.2 %Montgomery County91.2Clark County: 77.3 %Clark County77.3Crittenden County: 71.4 %Crittenden County71.4Pulaski County: 69.3 %Pulaski County69.3Newton County: 67.4 %Newton County67.4Pope County: 100 %Pope County100Washington County: 100 %Washington County100Garland County: 98.2 %Garland County98.2Ouachita County: 98.2 %Ouachita County98.2Phillips County: 98.2 %Phillips County98.2Marion County: 98.1 %Marion County98.1Polk County: 98.1 %Polk County98.1Union County: 98.1 %Union County98.1Ashley County: 96.7 %Ashley County96.7Craighead County: 96.7 %Craighead County96.7Sebastian County: 96.6 %Sebastian County96.6Jefferson County: 96.4 %Jefferson County96.4White County: 96.4 %White County96.4Arkansas County: 95 %Arkansas County95Miller County: 95 %Miller County95Montgomery County: 91.2 %Montgomery County91.2Clark County: 77.3 %Clark County77.3Crittenden County: 71.4 %Crittenden County71.4Pulaski County: 69.3 %Pulaski County69.3Newton County: 67.4 %Newton County67.4
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties1997 (%)Change on 1996
1Pope County1000 pts
1Washington County100+1.7 pts
3Garland County98.2-1.8 pts
3Ouachita County98.2-0.1 pts
3Phillips County98.2+1.6 pts
6Marion County98.1-0.2 pts
6Polk County98.1-0.1 pts
6Union County98.1-0.1 pts
9Ashley County96.70 pts
9Craighead County96.7-1.6 pts
11Sebastian County96.6-1.7 pts
12Jefferson County96.4-3.6 pts
12White County96.4-1.7 pts
14Arkansas County95+3.9 pts
14Miller County95-5 pts
16Montgomery County91.2-3.3 pts
17Clark County77.3-4.2 pts
18Crittenden County71.4-0.7 pts
19Pulaski County69.3-8.8 pts
20Newton County67.4-6 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 1997 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), 1997) [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), 1997. 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=1997. 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), 1997. 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=1997.

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), 1997 [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=1997 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_arkansas_by_1997,
  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), 1997}},
  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=1997. 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), 1997
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=1997
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/arkansas-counties?period=1997.
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)?

Pope County, with 100% in 1997, according to EPA.

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

Newton County, with 67.4% in 1997.

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 1997 and are not ranked.

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

Counties in Arkansas: more rankings