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)

Dawson County had the highest share of days with good air quality (US EPA AQI) of 32 counties in 2011, at 81.6%. Lowndes County had the lowest, at 11.8%. The median was 39.5%. Source: EPA.

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Highest81.6Dawson County
Lowest11.8Lowndes County
Median39.532 counties

Map of counties, 2011

Bibb County: 29.7 %Charlton County: 67 %Chatham County: 41.2 %Chattooga County: 78.9 %Clarke County: 42.7 %Clayton County: 31.4 %Cobb County: 33.1 %Coffee County: 47.5 %Columbia County: 62.8 %Coweta County: 50.4 %Dawson County: 81.6 %DeKalb County: 23 %Dougherty County: 20.5 %Douglas County: 72.2 %Floyd County: 30.8 %Fulton County: 32.1 %Glynn County: 77.1 %Gwinnett County: 33.2 %Hall County: 26.8 %Henry County: 43.6 %Houston County: 28.7 %Lowndes County: 11.8 %Murray County: 61.4 %Muscogee County: 37.8 %Paulding County: 35.7 %Pike County: 76.5 %Richmond County: 36.5 %Rockdale County: 68.4 %Sumter County: 73.7 %Walker County: 21.1 %Washington County: 45.9 %Wilkinson County: 35.6 %
  • Under 29
  • 29 to 33
  • 33 to 40
  • 40 to 49
  • 49 to 72
  • 72 and over
  • No data
%, 2011. 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, 2011

Dawson County: 81.6 %Dawson County81.6Chattooga County: 78.9 %Chattooga County78.9Glynn County: 77.1 %Glynn County77.1Pike County: 76.5 %Pike County76.5Sumter County: 73.7 %Sumter County73.7Douglas County: 72.2 %Douglas County72.2Rockdale County: 68.4 %Rockdale County68.4Charlton County: 67 %Charlton County67Columbia County: 62.8 %Columbia County62.8Murray County: 61.4 %Murray County61.4Coweta County: 50.4 %Coweta County50.4Coffee County: 47.5 %Coffee County47.5Washington County: 45.9 %Washington County45.9Henry County: 43.6 %Henry County43.6Clarke County: 42.7 %Clarke County42.7Chatham County: 41.2 %Chatham County41.2Muscogee County: 37.8 %Muscogee County37.8Richmond County: 36.5 %Richmond County36.5Paulding County: 35.7 %Paulding County35.7Wilkinson County: 35.6 %Wilkinson County35.6Gwinnett County: 33.2 %Gwinnett County33.2Cobb County: 33.1 %Cobb County33.1Fulton County: 32.1 %Fulton County32.1Clayton County: 31.4 %Clayton County31.4Floyd County: 30.8 %Floyd County30.8Bibb County: 29.7 %Bibb County29.7Houston County: 28.7 %Houston County28.7Hall County: 26.8 %Hall County26.8DeKalb County: 23 %DeKalb County23Walker County: 21.1 %Walker County21.1Dougherty County: 20.5 %Dougherty County20.5Lowndes County: 11.8 %Lowndes County11.8Dawson County: 81.6 %Dawson County81.6Chattooga County: 78.9 %Chattooga County78.9Glynn County: 77.1 %Glynn County77.1Pike County: 76.5 %Pike County76.5Sumter County: 73.7 %Sumter County73.7Douglas County: 72.2 %Douglas County72.2Rockdale County: 68.4 %Rockdale County68.4Charlton County: 67 %Charlton County67Columbia County: 62.8 %Columbia County62.8Murray County: 61.4 %Murray County61.4Coweta County: 50.4 %Coweta County50.4Coffee County: 47.5 %Coffee County47.5Washington County: 45.9 %Washington County45.9Henry County: 43.6 %Henry County43.6Clarke County: 42.7 %Clarke County42.7Chatham County: 41.2 %Chatham County41.2Muscogee County: 37.8 %Muscogee County37.8Richmond County: 36.5 %Richmond County36.5Paulding County: 35.7 %Paulding County35.7Wilkinson County: 35.6 %Wilkinson County35.6Gwinnett County: 33.2 %Gwinnett County33.2Cobb County: 33.1 %Cobb County33.1Fulton County: 32.1 %Fulton County32.1Clayton County: 31.4 %Clayton County31.4Floyd County: 30.8 %Floyd County30.8Bibb County: 29.7 %Bibb County29.7Houston County: 28.7 %Houston County28.7Hall County: 26.8 %Hall County26.8DeKalb County: 23 %DeKalb County23Walker County: 21.1 %Walker County21.1Dougherty County: 20.5 %Dougherty County20.5Lowndes County: 11.8 %Lowndes County11.8
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2011 (%)Change on 2010
1Dawson County81.6+5 pts
2Chattooga County78.9+2 pts
3Glynn County77.10 pts
4Pike County76.5+3 pts
5Sumter County73.7-7.1 pts
6Douglas County72.2+7 pts
7Rockdale County68.4-10.1 pts
8Charlton County67-6.9 pts
9Columbia County62.8-11.7 pts
10Murray County61.4-3.7 pts
11Coweta County50.4+7.7 pts
12Coffee County47.5-6.7 pts
13Washington County45.9+2.1 pts
14Henry County43.6+0.6 pts
15Clarke County42.7+0.8 pts
16Chatham County41.2-1.1 pts
17Muscogee County37.8+2.2 pts
18Richmond County36.5-1.4 pts
19Paulding County35.7-9.5 pts
20Wilkinson County35.6+15.8 pts
21Gwinnett County33.2-6.5 pts
22Cobb County33.1+2.3 pts
23Fulton County32.1+8.3 pts
24Clayton County31.4+6.4 pts
25Floyd County30.8+15.9 pts
26Bibb County29.7+6.6 pts
27Houston County28.7+4.8 pts
28Hall County26.8+0.2 pts
29DeKalb County23+4.9 pts
30Walker County21.1-6.5 pts
31Dougherty County20.5-11.2 pts
32Lowndes County11.8-2.1 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 2011 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), 2011) [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), 2011. 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=2011. 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), 2011. 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=2011.

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), 2011 [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=2011 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2011,
  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), 2011}},
  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=2011. 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), 2011
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=2011
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2011.
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)?

Dawson County, with 81.6% in 2011, according to EPA.

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

Lowndes County, with 11.8% in 2011.

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 2011 and are not ranked.

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

Counties in Georgia: more rankings