Data / Rankings / Median Air Quality Index (US EPA) / Counties in Georgia

Counties in Georgia by median Air Quality Index (US EPA)

Fulton County had the highest median Air Quality Index (US EPA) of 35 counties in 2006, at 69. Spalding County had the lowest, at 22. The median was 60. Source: the U.S. Environmental Protection Agency.

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Highest69Fulton County
Lowest22Spalding County
Median6035 counties

Map of counties, 2006

Bibb County: 63 indexCharlton County: 47 indexChatham County: 61 indexChattooga County: 44 indexClarke County: 61 indexClayton County: 65 indexCobb County: 59 indexCoffee County: 60 indexColumbia County: 44 indexCoweta County: 60 indexDawson County: 48 indexDeKalb County: 65 indexDougherty County: 58 indexDouglas County: 47 indexFayette County: 48 indexFloyd County: 65 indexFulton County: 69 indexGlynn County: 45 indexGwinnett County: 63 indexHall County: 60 indexHenry County: 61 indexHouston County: 61 indexLowndes County: 57 indexMurray County: 50 indexMuscogee County: 61 indexPaulding County: 59 indexPike County: 44 indexRichmond County: 62 indexRockdale County: 38 indexSpalding County: 22 indexSumter County: 47 indexWalker County: 63 indexWalton County: 57 indexWashington County: 62 indexWilkinson County: 61 index
  • Under 46
  • 46 to 52
  • 52 to 60
  • 60 to 61
  • 61 to 63
  • 63 and over
  • No data
index, 2006. Hatched areas have no value for this period. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2006

Fulton County: 69 indexFulton County69Clayton County: 65 indexClayton County65DeKalb County: 65 indexDeKalb County65Floyd County: 65 indexFloyd County65Bibb County: 63 indexBibb County63Gwinnett County: 63 indexGwinnett County63Walker County: 63 indexWalker County63Richmond County: 62 indexRichmond County62Washington County: 62 indexWashington County62Chatham County: 61 indexChatham County61Clarke County: 61 indexClarke County61Henry County: 61 indexHenry County61Houston County: 61 indexHouston County61Muscogee County: 61 indexMuscogee County61Wilkinson County: 61 indexWilkinson County61Coffee County: 60 indexCoffee County60Coweta County: 60 indexCoweta County60Hall County: 60 indexHall County60Cobb County: 59 indexCobb County59Paulding County: 59 indexPaulding County59Dougherty County: 58 indexDougherty County58Lowndes County: 57 indexLowndes County57Walton County: 57 indexWalton County57Murray County: 50 indexMurray County50Dawson County: 48 indexDawson County48Fayette County: 48 indexFayette County48Charlton County: 47 indexCharlton County47Douglas County: 47 indexDouglas County47Sumter County: 47 indexSumter County47Glynn County: 45 indexGlynn County45Chattooga County: 44 indexChattooga County44Columbia County: 44 indexColumbia County44Pike County: 44 indexPike County44Rockdale County: 38 indexRockdale County38Spalding County: 22 indexSpalding County22Fulton County: 69 indexFulton County69Clayton County: 65 indexClayton County65DeKalb County: 65 indexDeKalb County65Floyd County: 65 indexFloyd County65Bibb County: 63 indexBibb County63Gwinnett County: 63 indexGwinnett County63Walker County: 63 indexWalker County63Richmond County: 62 indexRichmond County62Washington County: 62 indexWashington County62Chatham County: 61 indexChatham County61Clarke County: 61 indexClarke County61Henry County: 61 indexHenry County61Houston County: 61 indexHouston County61Muscogee County: 61 indexMuscogee County61Wilkinson County: 61 indexWilkinson County61Coffee County: 60 indexCoffee County60Coweta County: 60 indexCoweta County60Hall County: 60 indexHall County60Cobb County: 59 indexCobb County59Paulding County: 59 indexPaulding County59Dougherty County: 58 indexDougherty County58Lowndes County: 57 indexLowndes County57Walton County: 57 indexWalton County57Murray County: 50 indexMurray County50Dawson County: 48 indexDawson County48Fayette County: 48 indexFayette County48Charlton County: 47 indexCharlton County47Douglas County: 47 indexDouglas County47Sumter County: 47 indexSumter County47Glynn County: 45 indexGlynn County45Chattooga County: 44 indexChattooga County44Columbia County: 44 indexColumbia County44Pike County: 44 indexPike County44Rockdale County: 38 indexRockdale County38Spalding County: 22 indexSpalding County22
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12.

Full ranking

RankCounties2006
index		Change on 2005
1Fulton County69+5
2Clayton County65+4
2DeKalb County65+2
2Floyd County65-1
5Bibb County63+3
5Gwinnett County63+3
5Walker County630
8Richmond County62+1
8Washington County62+3
10Chatham County61+3
10Clarke County61+2
10Henry County61+3
10Houston County61+4
10Muscogee County61+2
10Wilkinson County61+2
16Coffee County60+8
16Coweta County60+2
16Hall County60+2
19Cobb County59+3
19Paulding County59+1
21Dougherty County580
22Lowndes County57+2
22Walton County570
24Murray County50+3
25Dawson County48+5
25Fayette County48+1
27Charlton County47+10
27Douglas County470
27Sumter County47+5
30Glynn County45+1
31Chattooga County44+1
31Columbia County44+11
31Pike County44+5
34Rockdale County38+3
35Spalding County22+6

Other periods

About this ranking

Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries.

More on how it is measured
  • The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide).
  • Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.

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 2006 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: median daily AQI. 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: median daily AQI (Counties in Georgia by median Air Quality Index (US EPA), 2006) [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: median daily AQI, Counties in Georgia by median Air Quality Index (US EPA), 2006. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/median-air-quality-index/georgia-counties?period=2006. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Counties in Georgia by median Air Quality Index (US EPA), 2006. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/median-air-quality-index/georgia-counties?period=2006.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Counties in Georgia by median Air Quality Index (US EPA), 2006 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/median-air-quality-index/georgia-counties?period=2006 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2006,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Counties in Georgia by median Air Quality Index (US EPA), 2006}},
  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/median-air-quality-index/georgia-counties?period=2006. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. 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: median daily AQI: Counties in Georgia by median Air Quality Index (US EPA), 2006
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/median-air-quality-index/georgia-counties?period=2006
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-air-quality-index/georgia-counties?period=2006.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. 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 median Air Quality Index (US EPA)?

Fulton County, with 69 in 2006, according to the U.S. Environmental Protection Agency.

Which county has the lowest median Air Quality Index (US EPA)?

Spalding County, with 22 in 2006.

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: median daily AQI. Retrieved 2026-10-12. 4 counties have no value for 2006 and are not ranked.

Median Air Quality Index (US EPA): other rankings

Counties in Georgia: more rankings