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

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

Floyd County had the highest median Air Quality Index (US EPA) of 32 counties in 2013, at 58. Rockdale County had the lowest, at 31. The median was 47. Source: the U.S. Environmental Protection Agency.

Keep it in a collection in your library.
Highest58Floyd County
Lowest31Rockdale County
Median4732 counties

Map of counties, 2013

Bibb County: 51 indexCharlton County: 32 indexChatham County: 46 indexChattooga County: 37 indexClarke County: 47 indexClayton County: 52 indexCobb County: 50 indexCoffee County: 43 indexColumbia County: 37 indexCoweta County: 43 indexDawson County: 35 indexDeKalb County: 55 indexDougherty County: 53 indexDouglas County: 36 indexFloyd County: 58 indexFulton County: 47 indexGlynn County: 38 indexGwinnett County: 47 indexHall County: 53 indexHenry County: 46 indexHouston County: 51 indexLowndes County: 48 indexMurray County: 39 indexMuscogee County: 47 indexPaulding County: 52 indexPike County: 36 indexRichmond County: 48 indexRockdale County: 31 indexSumter County: 36 indexWalker County: 52 indexWashington County: 48 indexWilkinson County: 49 index
  • Under 36
  • 36 to 43
  • 43 to 47
  • 47 to 49
  • 49 to 52
  • 52 and over
  • No data
index, 2013. 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, 2013

Floyd County: 58 indexFloyd County58DeKalb County: 55 indexDeKalb County55Dougherty County: 53 indexDougherty County53Hall County: 53 indexHall County53Clayton County: 52 indexClayton County52Paulding County: 52 indexPaulding County52Walker County: 52 indexWalker County52Bibb County: 51 indexBibb County51Houston County: 51 indexHouston County51Cobb County: 50 indexCobb County50Wilkinson County: 49 indexWilkinson County49Lowndes County: 48 indexLowndes County48Richmond County: 48 indexRichmond County48Washington County: 48 indexWashington County48Clarke County: 47 indexClarke County47Fulton County: 47 indexFulton County47Gwinnett County: 47 indexGwinnett County47Muscogee County: 47 indexMuscogee County47Chatham County: 46 indexChatham County46Henry County: 46 indexHenry County46Coffee County: 43 indexCoffee County43Coweta County: 43 indexCoweta County43Murray County: 39 indexMurray County39Glynn County: 38 indexGlynn County38Chattooga County: 37 indexChattooga County37Columbia County: 37 indexColumbia County37Douglas County: 36 indexDouglas County36Pike County: 36 indexPike County36Sumter County: 36 indexSumter County36Dawson County: 35 indexDawson County35Charlton County: 32 indexCharlton County32Rockdale County: 31 indexRockdale County31Floyd County: 58 indexFloyd County58DeKalb County: 55 indexDeKalb County55Dougherty County: 53 indexDougherty County53Hall County: 53 indexHall County53Clayton County: 52 indexClayton County52Paulding County: 52 indexPaulding County52Walker County: 52 indexWalker County52Bibb County: 51 indexBibb County51Houston County: 51 indexHouston County51Cobb County: 50 indexCobb County50Wilkinson County: 49 indexWilkinson County49Lowndes County: 48 indexLowndes County48Richmond County: 48 indexRichmond County48Washington County: 48 indexWashington County48Clarke County: 47 indexClarke County47Fulton County: 47 indexFulton County47Gwinnett County: 47 indexGwinnett County47Muscogee County: 47 indexMuscogee County47Chatham County: 46 indexChatham County46Henry County: 46 indexHenry County46Coffee County: 43 indexCoffee County43Coweta County: 43 indexCoweta County43Murray County: 39 indexMurray County39Glynn County: 38 indexGlynn County38Chattooga County: 37 indexChattooga County37Columbia County: 37 indexColumbia County37Douglas County: 36 indexDouglas County36Pike County: 36 indexPike County36Sumter County: 36 indexSumter County36Dawson County: 35 indexDawson County35Charlton County: 32 indexCharlton County32Rockdale County: 31 indexRockdale County31
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12.

Full ranking

RankCounties2013
index		Change on 2012
1Floyd County58-10
2DeKalb County55-6
3Dougherty County53+2
3Hall County53-1
5Clayton County52-2
5Paulding County52-3
5Walker County52-3
8Bibb County51-3
8Houston County51-2
10Cobb County50-3
11Wilkinson County49-4
12Lowndes County48-9
12Richmond County48-4
12Washington County48+1
15Clarke County47-5
15Fulton County47-8
15Gwinnett County47-5
15Muscogee County47-4
19Chatham County46-5
19Henry County46-6
21Coffee County43-4
21Coweta County43-5
23Murray County39-4
24Glynn County38+2
25Chattooga County37-2
25Columbia County37-6
27Douglas County36-7
27Pike County36-5
27Sumter County36-4
30Dawson County35-5
31Charlton County32-4
32Rockdale County31-5

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. 7 counties with data in other periods have no value for 2013 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), 2013) [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), 2013. 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=2013. 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), 2013. 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=2013.

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), 2013 [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=2013 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_georgia_by_2013,
  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), 2013}},
  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=2013. 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), 2013
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=2013
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-air-quality-index/georgia-counties?period=2013.
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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Rank Counties in Georgia by median Air Quality Index (US EPA) using official data, and cite the source.
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Questions

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

Floyd County, with 58 in 2013, according to the U.S. Environmental Protection Agency.

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

Rockdale County, with 31 in 2013.

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. 7 counties have no value for 2013 and are not ranked.

Median Air Quality Index (US EPA): other rankings

Counties in Georgia: more rankings