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)

Spalding County had the highest share of days with good air quality (US EPA AQI) of 35 counties in 2007, at 100%. Fulton County had the lowest, at 10.7%. The median was 31.9%. Source: EPA.

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Highest100Spalding County
Lowest10.7Fulton County
Median31.935 counties

Map of counties, 2007

Bibb County: 23.3 %Charlton County: 75.9 %Chatham County: 26.8 %Chattooga County: 53.8 %Clarke County: 28.9 %Clayton County: 20.3 %Cobb County: 35.3 %Coffee County: 24.5 %Columbia County: 58.4 %Coweta County: 31.9 %Dawson County: 61.2 %DeKalb County: 15.3 %Dougherty County: 28.9 %Douglas County: 53 %Fayette County: 55.1 %Floyd County: 19 %Fulton County: 10.7 %Glynn County: 69.9 %Gwinnett County: 25.1 %Hall County: 27.8 %Henry County: 32.5 %Houston County: 28.2 %Lowndes County: 45.3 %Murray County: 46.3 %Muscogee County: 24.4 %Paulding County: 33.2 %Pike County: 68 %Richmond County: 22.3 %Rockdale County: 72.5 %Spalding County: 100 %Sumter County: 65.4 %Walker County: 19.6 %Walton County: 39.2 %Washington County: 21.7 %Wilkinson County: 15.8 %
  • Under 21
  • 21 to 26
  • 26 to 32
  • 32 to 46
  • 46 to 63
  • 63 and over
  • No data
%, 2007. 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, 2007

Spalding County: 100 %Spalding County100Charlton County: 75.9 %Charlton County75.9Rockdale County: 72.5 %Rockdale County72.5Glynn County: 69.9 %Glynn County69.9Pike County: 68 %Pike County68Sumter County: 65.4 %Sumter County65.4Dawson County: 61.2 %Dawson County61.2Columbia County: 58.4 %Columbia County58.4Fayette County: 55.1 %Fayette County55.1Chattooga County: 53.8 %Chattooga County53.8Douglas County: 53 %Douglas County53Murray County: 46.3 %Murray County46.3Lowndes County: 45.3 %Lowndes County45.3Walton County: 39.2 %Walton County39.2Cobb County: 35.3 %Cobb County35.3Paulding County: 33.2 %Paulding County33.2Henry County: 32.5 %Henry County32.5Coweta County: 31.9 %Coweta County31.9Clarke County: 28.9 %Clarke County28.9Dougherty County: 28.9 %Dougherty County28.9Houston County: 28.2 %Houston County28.2Hall County: 27.8 %Hall County27.8Chatham County: 26.8 %Chatham County26.8Gwinnett County: 25.1 %Gwinnett County25.1Coffee County: 24.5 %Coffee County24.5Muscogee County: 24.4 %Muscogee County24.4Bibb County: 23.3 %Bibb County23.3Richmond County: 22.3 %Richmond County22.3Washington County: 21.7 %Washington County21.7Clayton County: 20.3 %Clayton County20.3Walker County: 19.6 %Walker County19.6Floyd County: 19 %Floyd County19Wilkinson County: 15.8 %Wilkinson County15.8DeKalb County: 15.3 %DeKalb County15.3Fulton County: 10.7 %Fulton County10.7Spalding County: 100 %Spalding County100Charlton County: 75.9 %Charlton County75.9Rockdale County: 72.5 %Rockdale County72.5Glynn County: 69.9 %Glynn County69.9Pike County: 68 %Pike County68Sumter County: 65.4 %Sumter County65.4Dawson County: 61.2 %Dawson County61.2Columbia County: 58.4 %Columbia County58.4Fayette County: 55.1 %Fayette County55.1Chattooga County: 53.8 %Chattooga County53.8Douglas County: 53 %Douglas County53Murray County: 46.3 %Murray County46.3Lowndes County: 45.3 %Lowndes County45.3Walton County: 39.2 %Walton County39.2Cobb County: 35.3 %Cobb County35.3Paulding County: 33.2 %Paulding County33.2Henry County: 32.5 %Henry County32.5Coweta County: 31.9 %Coweta County31.9Clarke County: 28.9 %Clarke County28.9Dougherty County: 28.9 %Dougherty County28.9Houston County: 28.2 %Houston County28.2Hall County: 27.8 %Hall County27.8Chatham County: 26.8 %Chatham County26.8Gwinnett County: 25.1 %Gwinnett County25.1Coffee County: 24.5 %Coffee County24.5Muscogee County: 24.4 %Muscogee County24.4Bibb County: 23.3 %Bibb County23.3Richmond County: 22.3 %Richmond County22.3Washington County: 21.7 %Washington County21.7Clayton County: 20.3 %Clayton County20.3Walker County: 19.6 %Walker County19.6Floyd County: 19 %Floyd County19Wilkinson County: 15.8 %Wilkinson County15.8DeKalb County: 15.3 %DeKalb County15.3Fulton County: 10.7 %Fulton County10.7
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2007 (%)Change on 2006
1Spalding County1000 pts
2Charlton County75.9+17.9 pts
3Rockdale County72.5+2.6 pts
4Glynn County69.9+5.4 pts
5Pike County68+3.9 pts
6Sumter County65.4+2.4 pts
7Dawson County61.2+0.6 pts
8Columbia County58.4-9.8 pts
9Fayette County55.1-2.7 pts
10Chattooga County53.8-20 pts
11Douglas County53-1.9 pts
12Murray County46.3-5 pts
13Lowndes County45.3+17.4 pts
14Walton County39.2+7.4 pts
15Cobb County35.3-3.1 pts
16Paulding County33.2+2.5 pts
17Henry County32.5+6.4 pts
18Coweta County31.9+6.3 pts
19Clarke County28.9+4.8 pts
19Dougherty County28.9+4.8 pts
21Houston County28.2+9.9 pts
22Hall County27.8+0.5 pts
23Chatham County26.8+4.3 pts
24Gwinnett County25.1+1 pts
25Coffee County24.5+10.7 pts
26Muscogee County24.4+1.7 pts
27Bibb County23.3+3.2 pts
28Richmond County22.3+1.1 pts
29Washington County21.7+0.4 pts
30Clayton County20.3+4.3 pts
31Walker County19.6-1 pts
32Floyd County19-1.5 pts
33Wilkinson County15.8-2.5 pts
34DeKalb County15.30 pts
35Fulton County10.7+4.7 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. 4 counties with data in other periods have no value for 2007 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), 2007) [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), 2007. 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=2007. 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), 2007. 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=2007.

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), 2007 [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=2007 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2007,
  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), 2007}},
  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=2007. 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), 2007
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=2007
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2007.
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)?

Spalding County, with 100% in 2007, according to EPA.

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

Fulton County, with 10.7% in 2007.

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. 4 counties have no value for 2007 and are not ranked.

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

Counties in Georgia: more rankings