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 2012, at 90.9%. Floyd County had the lowest, at 4.9%. The median was 47.6%. Source: EPA.

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Highest90.9Dawson County
Lowest4.9Floyd County
Median47.632 counties

Map of counties, 2012

Bibb County: 33.9 %Charlton County: 81 %Chatham County: 48.6 %Chattooga County: 81.9 %Clarke County: 46.2 %Clayton County: 40.5 %Cobb County: 40.8 %Coffee County: 60 %Columbia County: 80.8 %Coweta County: 53 %Dawson County: 90.9 %DeKalb County: 23.8 %Dougherty County: 48.3 %Douglas County: 73.1 %Floyd County: 4.9 %Fulton County: 29.8 %Glynn County: 90.2 %Gwinnett County: 43.5 %Hall County: 36.9 %Henry County: 46.8 %Houston County: 35.2 %Lowndes County: 18.3 %Murray County: 79.5 %Muscogee County: 49.5 %Paulding County: 28.4 %Pike County: 79.6 %Richmond County: 42.3 %Rockdale County: 78.1 %Sumter County: 87.6 %Walker County: 31.3 %Washington County: 55.1 %Wilkinson County: 37.6 %
  • Under 32
  • 32 to 41
  • 41 to 48
  • 48 to 58
  • 58 to 81
  • 81 and over
  • No data
%, 2012. 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, 2012

Dawson County: 90.9 %Dawson County90.9Glynn County: 90.2 %Glynn County90.2Sumter County: 87.6 %Sumter County87.6Chattooga County: 81.9 %Chattooga County81.9Charlton County: 81 %Charlton County81Columbia County: 80.8 %Columbia County80.8Pike County: 79.6 %Pike County79.6Murray County: 79.5 %Murray County79.5Rockdale County: 78.1 %Rockdale County78.1Douglas County: 73.1 %Douglas County73.1Coffee County: 60 %Coffee County60Washington County: 55.1 %Washington County55.1Coweta County: 53 %Coweta County53Muscogee County: 49.5 %Muscogee County49.5Chatham County: 48.6 %Chatham County48.6Dougherty County: 48.3 %Dougherty County48.3Henry County: 46.8 %Henry County46.8Clarke County: 46.2 %Clarke County46.2Gwinnett County: 43.5 %Gwinnett County43.5Richmond County: 42.3 %Richmond County42.3Cobb County: 40.8 %Cobb County40.8Clayton County: 40.5 %Clayton County40.5Wilkinson County: 37.6 %Wilkinson County37.6Hall County: 36.9 %Hall County36.9Houston County: 35.2 %Houston County35.2Bibb County: 33.9 %Bibb County33.9Walker County: 31.3 %Walker County31.3Fulton County: 29.8 %Fulton County29.8Paulding County: 28.4 %Paulding County28.4DeKalb County: 23.8 %DeKalb County23.8Lowndes County: 18.3 %Lowndes County18.3Floyd County: 4.9 %Floyd County4.9Dawson County: 90.9 %Dawson County90.9Glynn County: 90.2 %Glynn County90.2Sumter County: 87.6 %Sumter County87.6Chattooga County: 81.9 %Chattooga County81.9Charlton County: 81 %Charlton County81Columbia County: 80.8 %Columbia County80.8Pike County: 79.6 %Pike County79.6Murray County: 79.5 %Murray County79.5Rockdale County: 78.1 %Rockdale County78.1Douglas County: 73.1 %Douglas County73.1Coffee County: 60 %Coffee County60Washington County: 55.1 %Washington County55.1Coweta County: 53 %Coweta County53Muscogee County: 49.5 %Muscogee County49.5Chatham County: 48.6 %Chatham County48.6Dougherty County: 48.3 %Dougherty County48.3Henry County: 46.8 %Henry County46.8Clarke County: 46.2 %Clarke County46.2Gwinnett County: 43.5 %Gwinnett County43.5Richmond County: 42.3 %Richmond County42.3Cobb County: 40.8 %Cobb County40.8Clayton County: 40.5 %Clayton County40.5Wilkinson County: 37.6 %Wilkinson County37.6Hall County: 36.9 %Hall County36.9Houston County: 35.2 %Houston County35.2Bibb County: 33.9 %Bibb County33.9Walker County: 31.3 %Walker County31.3Fulton County: 29.8 %Fulton County29.8Paulding County: 28.4 %Paulding County28.4DeKalb County: 23.8 %DeKalb County23.8Lowndes County: 18.3 %Lowndes County18.3Floyd County: 4.9 %Floyd County4.9
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2012 (%)Change on 2011
1Dawson County90.9+9.3 pts
2Glynn County90.2+13.1 pts
3Sumter County87.6+13.9 pts
4Chattooga County81.9+3 pts
5Charlton County81+14 pts
6Columbia County80.8+18 pts
7Pike County79.6+3.1 pts
8Murray County79.5+18.1 pts
9Rockdale County78.1+9.7 pts
10Douglas County73.1+0.9 pts
11Coffee County60+12.5 pts
12Washington County55.1+9.2 pts
13Coweta County53+2.6 pts
14Muscogee County49.5+11.7 pts
15Chatham County48.6+7.4 pts
16Dougherty County48.3+27.8 pts
17Henry County46.8+3.2 pts
18Clarke County46.2+3.5 pts
19Gwinnett County43.5+10.3 pts
20Richmond County42.3+5.8 pts
21Cobb County40.8+7.7 pts
22Clayton County40.5+9.1 pts
23Wilkinson County37.6+2 pts
24Hall County36.9+10.1 pts
25Houston County35.2+6.5 pts
26Bibb County33.9+4.2 pts
27Walker County31.3+10.2 pts
28Fulton County29.8-2.3 pts
29Paulding County28.4-7.3 pts
30DeKalb County23.8+0.8 pts
31Lowndes County18.3+6.5 pts
32Floyd County4.9-25.9 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 2012 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), 2012) [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), 2012. 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=2012. 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), 2012. 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=2012.

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), 2012 [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=2012 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2012,
  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), 2012}},
  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=2012. 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), 2012
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=2012
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2012.
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 90.9% in 2012, according to EPA.

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

Floyd County, with 4.9% in 2012.

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 2012 and are not ranked.

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

Counties in Georgia: more rankings