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 2005, at 98.3%. Fulton County had the lowest, at 12.3%. The median was 29.3%. Source: EPA.

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Highest98.3Spalding County
Lowest12.3Fulton County
Median29.335 counties

Map of counties, 2005

Bibb County: 25.9 %Charlton County: 70 %Chatham County: 25.2 %Chattooga County: 72.8 %Clarke County: 27.7 %Clayton County: 17 %Cobb County: 40.6 %Coffee County: 42.4 %Columbia County: 84 %Coweta County: 31.7 %Dawson County: 69.8 %DeKalb County: 15.1 %Dougherty County: 29.3 %Douglas County: 58.2 %Fayette County: 58 %Floyd County: 14 %Fulton County: 12.3 %Glynn County: 62.3 %Gwinnett County: 27.1 %Hall County: 22.3 %Henry County: 28.5 %Houston County: 25 %Lowndes County: 32.7 %Murray County: 57 %Muscogee County: 27.7 %Paulding County: 29.3 %Pike County: 74.4 %Richmond County: 19.2 %Rockdale County: 73.2 %Spalding County: 98.3 %Sumter County: 71.7 %Walker County: 14.3 %Walton County: 28.3 %Washington County: 29 %Wilkinson County: 14.7 %
  • Under 18
  • 18 to 27
  • 27 to 29
  • 29 to 52
  • 52 to 71
  • 71 and over
  • No data
%, 2005. 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, 2005

Spalding County: 98.3 %Spalding County98.3Columbia County: 84 %Columbia County84Pike County: 74.4 %Pike County74.4Rockdale County: 73.2 %Rockdale County73.2Chattooga County: 72.8 %Chattooga County72.8Sumter County: 71.7 %Sumter County71.7Charlton County: 70 %Charlton County70Dawson County: 69.8 %Dawson County69.8Glynn County: 62.3 %Glynn County62.3Douglas County: 58.2 %Douglas County58.2Fayette County: 58 %Fayette County58Murray County: 57 %Murray County57Coffee County: 42.4 %Coffee County42.4Cobb County: 40.6 %Cobb County40.6Lowndes County: 32.7 %Lowndes County32.7Coweta County: 31.7 %Coweta County31.7Dougherty County: 29.3 %Dougherty County29.3Paulding County: 29.3 %Paulding County29.3Washington County: 29 %Washington County29Henry County: 28.5 %Henry County28.5Walton County: 28.3 %Walton County28.3Clarke County: 27.7 %Clarke County27.7Muscogee County: 27.7 %Muscogee County27.7Gwinnett County: 27.1 %Gwinnett County27.1Bibb County: 25.9 %Bibb County25.9Chatham County: 25.2 %Chatham County25.2Houston County: 25 %Houston County25Hall County: 22.3 %Hall County22.3Richmond County: 19.2 %Richmond County19.2Clayton County: 17 %Clayton County17DeKalb County: 15.1 %DeKalb County15.1Wilkinson County: 14.7 %Wilkinson County14.7Walker County: 14.3 %Walker County14.3Floyd County: 14 %Floyd County14Fulton County: 12.3 %Fulton County12.3Spalding County: 98.3 %Spalding County98.3Columbia County: 84 %Columbia County84Pike County: 74.4 %Pike County74.4Rockdale County: 73.2 %Rockdale County73.2Chattooga County: 72.8 %Chattooga County72.8Sumter County: 71.7 %Sumter County71.7Charlton County: 70 %Charlton County70Dawson County: 69.8 %Dawson County69.8Glynn County: 62.3 %Glynn County62.3Douglas County: 58.2 %Douglas County58.2Fayette County: 58 %Fayette County58Murray County: 57 %Murray County57Coffee County: 42.4 %Coffee County42.4Cobb County: 40.6 %Cobb County40.6Lowndes County: 32.7 %Lowndes County32.7Coweta County: 31.7 %Coweta County31.7Dougherty County: 29.3 %Dougherty County29.3Paulding County: 29.3 %Paulding County29.3Washington County: 29 %Washington County29Henry County: 28.5 %Henry County28.5Walton County: 28.3 %Walton County28.3Clarke County: 27.7 %Clarke County27.7Muscogee County: 27.7 %Muscogee County27.7Gwinnett County: 27.1 %Gwinnett County27.1Bibb County: 25.9 %Bibb County25.9Chatham County: 25.2 %Chatham County25.2Houston County: 25 %Houston County25Hall County: 22.3 %Hall County22.3Richmond County: 19.2 %Richmond County19.2Clayton County: 17 %Clayton County17DeKalb County: 15.1 %DeKalb County15.1Wilkinson County: 14.7 %Wilkinson County14.7Walker County: 14.3 %Walker County14.3Floyd County: 14 %Floyd County14Fulton County: 12.3 %Fulton County12.3
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2005 (%)Change on 2004
1Spalding County98.3-1.7 pts
2Columbia County84n/a
3Pike County74.4-4.4 pts
4Rockdale County73.2-4.1 pts
5Chattooga County72.8+0.1 pts
6Sumter County71.7-3 pts
7Charlton County70+6.8 pts
8Dawson County69.8-8.6 pts
9Glynn County62.3-6.8 pts
10Douglas County58.2-14.5 pts
11Fayette County58-5.8 pts
12Murray County57-4.6 pts
13Coffee County42.4+3.1 pts
14Cobb County40.6-10.8 pts
15Lowndes County32.7+8.2 pts
16Coweta County31.7-1.1 pts
17Dougherty County29.3-1.5 pts
17Paulding County29.3-3 pts
19Washington County29+7.3 pts
20Henry County28.5+2.4 pts
21Walton County28.3n/a
22Clarke County27.7-11.9 pts
22Muscogee County27.7+2.3 pts
24Gwinnett County27.1+0.8 pts
25Bibb County25.9-5.5 pts
26Chatham County25.2+0.3 pts
27Houston County25+4.3 pts
28Hall County22.3-3.6 pts
29Richmond County19.2-2.2 pts
30Clayton County17+7.8 pts
31DeKalb County15.1+1.7 pts
32Wilkinson County14.7-3.8 pts
33Walker County14.3-11.5 pts
34Floyd County14-4.6 pts
35Fulton County12.3-3 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 2005 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), 2005) [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), 2005. 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=2005. 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), 2005. 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=2005.

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), 2005 [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=2005 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2005,
  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), 2005}},
  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=2005. 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), 2005
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=2005
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/georgia-counties?period=2005.
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 98.3% in 2005, according to EPA.

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

Fulton County, with 12.3% in 2005.

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 2005 and are not ranked.

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

Counties in Georgia: more rankings