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 2008, at 100%. Fulton County had the lowest, at 12%. The median was 37.2%. Source: EPA.

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Highest100Spalding County
Lowest12Fulton County
Median37.235 counties

Map of counties, 2008

Bibb County: 28.8 %Charlton County: 70.8 %Chatham County: 38.3 %Chattooga County: 77.3 %Clarke County: 36.5 %Clayton County: 16.5 %Cobb County: 37.2 %Coffee County: 52.8 %Columbia County: 66 %Coweta County: 37.2 %Dawson County: 68.9 %DeKalb County: 18 %Dougherty County: 21.8 %Douglas County: 66.5 %Fayette County: 75.5 %Floyd County: 24.9 %Fulton County: 12 %Glynn County: 74 %Gwinnett County: 35.4 %Hall County: 20.7 %Henry County: 34.6 %Houston County: 20.2 %Lowndes County: 15 %Murray County: 58.5 %Muscogee County: 33.8 %Paulding County: 39.9 %Pike County: 74.4 %Richmond County: 28.9 %Rockdale County: 73.5 %Spalding County: 100 %Sumter County: 78.9 %Walker County: 17.1 %Walton County: 35.9 %Washington County: 47.6 %Wilkinson County: 29.1 %
  • Under 21
  • 21 to 31
  • 31 to 37
  • 37 to 57
  • 57 to 74
  • 74 and over
  • No data
%, 2008. 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, 2008

Spalding County: 100 %Spalding County100Sumter County: 78.9 %Sumter County78.9Chattooga County: 77.3 %Chattooga County77.3Fayette County: 75.5 %Fayette County75.5Pike County: 74.4 %Pike County74.4Glynn County: 74 %Glynn County74Rockdale County: 73.5 %Rockdale County73.5Charlton County: 70.8 %Charlton County70.8Dawson County: 68.9 %Dawson County68.9Douglas County: 66.5 %Douglas County66.5Columbia County: 66 %Columbia County66Murray County: 58.5 %Murray County58.5Coffee County: 52.8 %Coffee County52.8Washington County: 47.6 %Washington County47.6Paulding County: 39.9 %Paulding County39.9Chatham County: 38.3 %Chatham County38.3Cobb County: 37.2 %Cobb County37.2Coweta County: 37.2 %Coweta County37.2Clarke County: 36.5 %Clarke County36.5Walton County: 35.9 %Walton County35.9Gwinnett County: 35.4 %Gwinnett County35.4Henry County: 34.6 %Henry County34.6Muscogee County: 33.8 %Muscogee County33.8Wilkinson County: 29.1 %Wilkinson County29.1Richmond County: 28.9 %Richmond County28.9Bibb County: 28.8 %Bibb County28.8Floyd County: 24.9 %Floyd County24.9Dougherty County: 21.8 %Dougherty County21.8Hall County: 20.7 %Hall County20.7Houston County: 20.2 %Houston County20.2DeKalb County: 18 %DeKalb County18Walker County: 17.1 %Walker County17.1Clayton County: 16.5 %Clayton County16.5Lowndes County: 15 %Lowndes County15Fulton County: 12 %Fulton County12Spalding County: 100 %Spalding County100Sumter County: 78.9 %Sumter County78.9Chattooga County: 77.3 %Chattooga County77.3Fayette County: 75.5 %Fayette County75.5Pike County: 74.4 %Pike County74.4Glynn County: 74 %Glynn County74Rockdale County: 73.5 %Rockdale County73.5Charlton County: 70.8 %Charlton County70.8Dawson County: 68.9 %Dawson County68.9Douglas County: 66.5 %Douglas County66.5Columbia County: 66 %Columbia County66Murray County: 58.5 %Murray County58.5Coffee County: 52.8 %Coffee County52.8Washington County: 47.6 %Washington County47.6Paulding County: 39.9 %Paulding County39.9Chatham County: 38.3 %Chatham County38.3Cobb County: 37.2 %Cobb County37.2Coweta County: 37.2 %Coweta County37.2Clarke County: 36.5 %Clarke County36.5Walton County: 35.9 %Walton County35.9Gwinnett County: 35.4 %Gwinnett County35.4Henry County: 34.6 %Henry County34.6Muscogee County: 33.8 %Muscogee County33.8Wilkinson County: 29.1 %Wilkinson County29.1Richmond County: 28.9 %Richmond County28.9Bibb County: 28.8 %Bibb County28.8Floyd County: 24.9 %Floyd County24.9Dougherty County: 21.8 %Dougherty County21.8Hall County: 20.7 %Hall County20.7Houston County: 20.2 %Houston County20.2DeKalb County: 18 %DeKalb County18Walker County: 17.1 %Walker County17.1Clayton County: 16.5 %Clayton County16.5Lowndes County: 15 %Lowndes County15Fulton County: 12 %Fulton County12
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2008 (%)Change on 2007
1Spalding County1000 pts
2Sumter County78.9+13.5 pts
3Chattooga County77.3+23.5 pts
4Fayette County75.5+20.4 pts
5Pike County74.4+6.4 pts
6Glynn County74+4.1 pts
7Rockdale County73.5+1 pts
8Charlton County70.8-5.1 pts
9Dawson County68.9+7.7 pts
10Douglas County66.5+13.5 pts
11Columbia County66+7.6 pts
12Murray County58.5+12.2 pts
13Coffee County52.8+28.3 pts
14Washington County47.6+25.9 pts
15Paulding County39.9+6.7 pts
16Chatham County38.3+11.5 pts
17Cobb County37.2+1.9 pts
17Coweta County37.2+5.3 pts
19Clarke County36.5+7.6 pts
20Walton County35.9-3.3 pts
21Gwinnett County35.4+10.3 pts
22Henry County34.6+2.1 pts
23Muscogee County33.8+9.4 pts
24Wilkinson County29.1+13.3 pts
25Richmond County28.9+6.6 pts
26Bibb County28.8+5.5 pts
27Floyd County24.9+5.9 pts
28Dougherty County21.8-7.1 pts
29Hall County20.7-7.1 pts
30Houston County20.2-8 pts
31DeKalb County18+2.7 pts
32Walker County17.1-2.5 pts
33Clayton County16.5-3.8 pts
34Lowndes County15-30.3 pts
35Fulton County12+1.3 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 2008 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), 2008) [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), 2008. 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=2008. 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), 2008. 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=2008.

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), 2008 [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=2008 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2008,
  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), 2008}},
  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=2008. 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), 2008
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=2008
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2008.
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 2008, according to EPA.

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

Fulton County, with 12% in 2008.

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 2008 and are not ranked.

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

Counties in Georgia: more rankings