Data / Share of days with good air quality (US EPA AQI) / Ouachita County

Share of days with good air quality (US EPA AQI) in Ouachita County

Share of days with good air quality (US EPA AQI) in Ouachita County was 98.2% in 1997, according to EPA. That is down 0.1 pts from 1996.

199798.2%
Change on 1996-0.1 pts
Series high1001990
Series low96.91989

Next release: Tuesday, 13 July 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

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Share of days with good air quality (US EPA AQI) in Ouachita County, 1989 to 1997

96979899100198919911993199519971989: 96.9 %1990: 100 %1991: 98.2 %1992: 98.4 %1993: 100 %1994: 100 %1995: 98.3 %1996: 98.3 %1997: 98.2 %969798991001989199219971989: 96.9 %1990: 100 %1991: 98.2 %1992: 98.4 %1993: 100 %1994: 100 %1995: 98.3 %1996: 98.3 %1997: 98.2 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 9 values
Period%
199798.2
199698.3
199598.3
1994100
1993100
199298.4
199198.2
1990100
198996.9

Ouachita County compared with nearby places

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
Share of days with good air quality (US EPA AQI), 1997, %. Ouachita County is outlined. Same source and period for every area shown. Source: U.S. Environmental Protection Agency. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

Definition

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.

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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 (Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 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, Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 1997. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/good-air-quality-days-share/ouachita-county-arkansas. 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. Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 1997. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/good-air-quality-days-share/ouachita-county-arkansas.

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, Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 1997 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/ouachita-county-arkansas (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_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: Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 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/en/good-air-quality-days-share/ouachita-county-arkansas. 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: Share of days with good air quality (US EPA AQI), Ouachita County, 1989 to 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/en/good-air-quality-days-share/ouachita-county-arkansas
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/ouachita-county-arkansas.
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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Questions

What is the share of days with good air quality (US EPA AQI) in Ouachita County?

Share of days with good air quality (US EPA AQI) in Ouachita County was 98.2% in 1997, according to EPA. That is down 0.1 pts from 1996.

Where does this figure come from?

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 by Invokely on 2026-10-12.

What was the highest share of days with good air quality (US EPA AQI) in Ouachita County?

100% in 1990, the highest value since 1989 in this series.

Related statistics for Ouachita County

All statistics for Ouachita County | Ouachita County in figures