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

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

Sumter County had the highest share of days with good air quality (US EPA AQI) of 32 counties in 2009, at 94.8%. Fulton County had the lowest, at 19.2%. The median was 44.7%. Source: EPA.

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Highest94.8Sumter County
Lowest19.2Fulton County
Median44.732 counties

Map of counties, 2009

Bibb County: 32.7 %Charlton County: 78.3 %Chatham County: 43.8 %Chattooga County: 88.9 %Clarke County: 46.6 %Clayton County: 32.8 %Cobb County: 36.3 %Coffee County: 50.9 %Columbia County: 87 %Coweta County: 48.5 %Dawson County: 85.5 %DeKalb County: 27.4 %Dougherty County: 24.3 %Douglas County: 78.4 %Floyd County: 30.2 %Fulton County: 19.2 %Glynn County: 82.9 %Gwinnett County: 43.3 %Hall County: 32.2 %Henry County: 47.4 %Houston County: 21.8 %Lowndes County: 21.9 %Murray County: 78.6 %Muscogee County: 44.1 %Paulding County: 54.2 %Pike County: 88.1 %Richmond County: 41.6 %Rockdale County: 85.5 %Sumter County: 94.8 %Walker County: 32.3 %Washington County: 45.2 %Wilkinson County: 42.9 %
  • Under 31
  • 31 to 38
  • 38 to 45
  • 45 to 53
  • 53 to 85
  • 85 and over
  • No data
%, 2009. 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, 2009

Sumter County: 94.8 %Sumter County94.8Chattooga County: 88.9 %Chattooga County88.9Pike County: 88.1 %Pike County88.1Columbia County: 87 %Columbia County87Dawson County: 85.5 %Dawson County85.5Rockdale County: 85.5 %Rockdale County85.5Glynn County: 82.9 %Glynn County82.9Murray County: 78.6 %Murray County78.6Douglas County: 78.4 %Douglas County78.4Charlton County: 78.3 %Charlton County78.3Paulding County: 54.2 %Paulding County54.2Coffee County: 50.9 %Coffee County50.9Coweta County: 48.5 %Coweta County48.5Henry County: 47.4 %Henry County47.4Clarke County: 46.6 %Clarke County46.6Washington County: 45.2 %Washington County45.2Muscogee County: 44.1 %Muscogee County44.1Chatham County: 43.8 %Chatham County43.8Gwinnett County: 43.3 %Gwinnett County43.3Wilkinson County: 42.9 %Wilkinson County42.9Richmond County: 41.6 %Richmond County41.6Cobb County: 36.3 %Cobb County36.3Clayton County: 32.8 %Clayton County32.8Bibb County: 32.7 %Bibb County32.7Walker County: 32.3 %Walker County32.3Hall County: 32.2 %Hall County32.2Floyd County: 30.2 %Floyd County30.2DeKalb County: 27.4 %DeKalb County27.4Dougherty County: 24.3 %Dougherty County24.3Lowndes County: 21.9 %Lowndes County21.9Houston County: 21.8 %Houston County21.8Fulton County: 19.2 %Fulton County19.2Sumter County: 94.8 %Sumter County94.8Chattooga County: 88.9 %Chattooga County88.9Pike County: 88.1 %Pike County88.1Columbia County: 87 %Columbia County87Dawson County: 85.5 %Dawson County85.5Rockdale County: 85.5 %Rockdale County85.5Glynn County: 82.9 %Glynn County82.9Murray County: 78.6 %Murray County78.6Douglas County: 78.4 %Douglas County78.4Charlton County: 78.3 %Charlton County78.3Paulding County: 54.2 %Paulding County54.2Coffee County: 50.9 %Coffee County50.9Coweta County: 48.5 %Coweta County48.5Henry County: 47.4 %Henry County47.4Clarke County: 46.6 %Clarke County46.6Washington County: 45.2 %Washington County45.2Muscogee County: 44.1 %Muscogee County44.1Chatham County: 43.8 %Chatham County43.8Gwinnett County: 43.3 %Gwinnett County43.3Wilkinson County: 42.9 %Wilkinson County42.9Richmond County: 41.6 %Richmond County41.6Cobb County: 36.3 %Cobb County36.3Clayton County: 32.8 %Clayton County32.8Bibb County: 32.7 %Bibb County32.7Walker County: 32.3 %Walker County32.3Hall County: 32.2 %Hall County32.2Floyd County: 30.2 %Floyd County30.2DeKalb County: 27.4 %DeKalb County27.4Dougherty County: 24.3 %Dougherty County24.3Lowndes County: 21.9 %Lowndes County21.9Houston County: 21.8 %Houston County21.8Fulton County: 19.2 %Fulton County19.2
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2009 (%)Change on 2008
1Sumter County94.8+15.9 pts
2Chattooga County88.9+11.6 pts
3Pike County88.1+13.7 pts
4Columbia County87+21 pts
5Dawson County85.5+16.6 pts
5Rockdale County85.5+12 pts
7Glynn County82.9+8.9 pts
8Murray County78.6+20.1 pts
9Douglas County78.4+11.9 pts
10Charlton County78.3+7.5 pts
11Paulding County54.2+14.3 pts
12Coffee County50.9-1.9 pts
13Coweta County48.5+11.3 pts
14Henry County47.4+12.8 pts
15Clarke County46.6+10.1 pts
16Washington County45.2-2.4 pts
17Muscogee County44.1+10.3 pts
18Chatham County43.8+5.5 pts
19Gwinnett County43.3+7.9 pts
20Wilkinson County42.9+13.8 pts
21Richmond County41.6+12.7 pts
22Cobb County36.3-0.9 pts
23Clayton County32.8+16.3 pts
24Bibb County32.7+3.9 pts
25Walker County32.3+15.2 pts
26Hall County32.2+11.5 pts
27Floyd County30.2+5.3 pts
28DeKalb County27.4+9.4 pts
29Dougherty County24.3+2.5 pts
30Lowndes County21.9+6.9 pts
31Houston County21.8+1.6 pts
32Fulton County19.2+7.2 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. 7 counties with data in other periods have no value for 2009 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 Georgia by share of days with good air quality (US EPA AQI), 2009) [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 Georgia by share of days with good air quality (US EPA AQI), 2009. 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/georgia-counties?period=2009. 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 Georgia by share of days with good air quality (US EPA AQI), 2009. 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/georgia-counties?period=2009.

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 Georgia by share of days with good air quality (US EPA AQI), 2009 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2009 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2009,
  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 Georgia by share of days with good air quality (US EPA AQI), 2009}},
  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/georgia-counties?period=2009. 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 Georgia by share of days with good air quality (US EPA AQI), 2009
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/georgia-counties?period=2009
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2009.
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

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

Sumter County, with 94.8% in 2009, according to EPA.

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

Fulton County, with 19.2% in 2009.

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. 7 counties have no value for 2009 and are not ranked.

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

Counties in Georgia: more rankings