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 2010, at 80.8%. Lowndes County had the lowest, at 13.9%. The median was 42.1%. Source: EPA.

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Highest80.8Sumter County
Lowest13.9Lowndes County
Median42.132 counties

Map of counties, 2010

Bibb County: 23.1 %Charlton County: 73.9 %Chatham County: 42.3 %Chattooga County: 76.9 %Clarke County: 41.9 %Clayton County: 25 %Cobb County: 30.8 %Coffee County: 54.2 %Columbia County: 74.5 %Coweta County: 42.7 %Dawson County: 76.6 %DeKalb County: 18.1 %Dougherty County: 31.7 %Douglas County: 65.2 %Floyd County: 14.9 %Fulton County: 23.8 %Glynn County: 77.1 %Gwinnett County: 39.7 %Hall County: 26.6 %Henry County: 43 %Houston County: 23.9 %Lowndes County: 13.9 %Murray County: 65.1 %Muscogee County: 35.6 %Paulding County: 45.2 %Pike County: 73.5 %Richmond County: 37.9 %Rockdale County: 78.5 %Sumter County: 80.8 %Walker County: 27.6 %Washington County: 43.8 %Wilkinson County: 19.8 %
  • Under 24
  • 24 to 31
  • 31 to 42
  • 42 to 51
  • 51 to 74
  • 74 and over
  • No data
%, 2010. 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, 2010

Sumter County: 80.8 %Sumter County80.8Rockdale County: 78.5 %Rockdale County78.5Glynn County: 77.1 %Glynn County77.1Chattooga County: 76.9 %Chattooga County76.9Dawson County: 76.6 %Dawson County76.6Columbia County: 74.5 %Columbia County74.5Charlton County: 73.9 %Charlton County73.9Pike County: 73.5 %Pike County73.5Douglas County: 65.2 %Douglas County65.2Murray County: 65.1 %Murray County65.1Coffee County: 54.2 %Coffee County54.2Paulding County: 45.2 %Paulding County45.2Washington County: 43.8 %Washington County43.8Henry County: 43 %Henry County43Coweta County: 42.7 %Coweta County42.7Chatham County: 42.3 %Chatham County42.3Clarke County: 41.9 %Clarke County41.9Gwinnett County: 39.7 %Gwinnett County39.7Richmond County: 37.9 %Richmond County37.9Muscogee County: 35.6 %Muscogee County35.6Dougherty County: 31.7 %Dougherty County31.7Cobb County: 30.8 %Cobb County30.8Walker County: 27.6 %Walker County27.6Hall County: 26.6 %Hall County26.6Clayton County: 25 %Clayton County25Houston County: 23.9 %Houston County23.9Fulton County: 23.8 %Fulton County23.8Bibb County: 23.1 %Bibb County23.1Wilkinson County: 19.8 %Wilkinson County19.8DeKalb County: 18.1 %DeKalb County18.1Floyd County: 14.9 %Floyd County14.9Lowndes County: 13.9 %Lowndes County13.9Sumter County: 80.8 %Sumter County80.8Rockdale County: 78.5 %Rockdale County78.5Glynn County: 77.1 %Glynn County77.1Chattooga County: 76.9 %Chattooga County76.9Dawson County: 76.6 %Dawson County76.6Columbia County: 74.5 %Columbia County74.5Charlton County: 73.9 %Charlton County73.9Pike County: 73.5 %Pike County73.5Douglas County: 65.2 %Douglas County65.2Murray County: 65.1 %Murray County65.1Coffee County: 54.2 %Coffee County54.2Paulding County: 45.2 %Paulding County45.2Washington County: 43.8 %Washington County43.8Henry County: 43 %Henry County43Coweta County: 42.7 %Coweta County42.7Chatham County: 42.3 %Chatham County42.3Clarke County: 41.9 %Clarke County41.9Gwinnett County: 39.7 %Gwinnett County39.7Richmond County: 37.9 %Richmond County37.9Muscogee County: 35.6 %Muscogee County35.6Dougherty County: 31.7 %Dougherty County31.7Cobb County: 30.8 %Cobb County30.8Walker County: 27.6 %Walker County27.6Hall County: 26.6 %Hall County26.6Clayton County: 25 %Clayton County25Houston County: 23.9 %Houston County23.9Fulton County: 23.8 %Fulton County23.8Bibb County: 23.1 %Bibb County23.1Wilkinson County: 19.8 %Wilkinson County19.8DeKalb County: 18.1 %DeKalb County18.1Floyd County: 14.9 %Floyd County14.9Lowndes County: 13.9 %Lowndes County13.9
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2010 (%)Change on 2009
1Sumter County80.8-14 pts
2Rockdale County78.5-7 pts
3Glynn County77.1-5.8 pts
4Chattooga County76.9-12 pts
5Dawson County76.6-8.9 pts
6Columbia County74.5-12.5 pts
7Charlton County73.9-4.4 pts
8Pike County73.5-14.6 pts
9Douglas County65.2-13.2 pts
10Murray County65.1-13.5 pts
11Coffee County54.2+3.3 pts
12Paulding County45.2-9 pts
13Washington County43.8-1.4 pts
14Henry County43-4.4 pts
15Coweta County42.7-5.8 pts
16Chatham County42.3-1.5 pts
17Clarke County41.9-4.7 pts
18Gwinnett County39.7-3.6 pts
19Richmond County37.9-3.7 pts
20Muscogee County35.6-8.5 pts
21Dougherty County31.7+7.4 pts
22Cobb County30.8-5.5 pts
23Walker County27.6-4.7 pts
24Hall County26.6-5.6 pts
25Clayton County25-7.8 pts
26Houston County23.9+2.1 pts
27Fulton County23.8+4.6 pts
28Bibb County23.1-9.6 pts
29Wilkinson County19.8-23.1 pts
30DeKalb County18.1-9.3 pts
31Floyd County14.9-15.3 pts
32Lowndes County13.9-8 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 2010 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), 2010) [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), 2010. 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=2010. 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), 2010. 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=2010.

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), 2010 [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=2010 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2010,
  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), 2010}},
  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=2010. 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), 2010
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=2010
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2010.
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 80.8% in 2010, according to EPA.

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

Lowndes County, with 13.9% in 2010.

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 2010 and are not ranked.

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

Counties in Georgia: more rankings