Counties in Georgia by highest daily Air Quality Index (US EPA)

Fulton County had the highest highest daily Air Quality Index (US EPA) of 32 counties in 2013, at 177. Coffee County had the lowest, at 64. The median was 94. Source: the U.S. Environmental Protection Agency.

Highest177Fulton County

Lowest64Coffee County

Median9432 counties

Map of counties, 2013

Under 78
78 to 90
90 to 94
94 to 110
110 and over
No data

index, 2013. Hatched areas have no value for this period. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2013

index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2013 index	Change on 2012
1	Fulton County	177	-13
2	DeKalb County	140	-45
3	Dougherty County	126	+2
3	Pike County	126	-61
5	Lowndes County	118	-14
6	Gwinnett County	112	-57
7	Muscogee County	111	+7
8	Cobb County	108	-46
8	Rockdale County	108	-71
10	Bibb County	105	-42
10	Dawson County	105	+12
10	Henry County	105	-113
13	Richmond County	102	-41
14	Douglas County	101	-32
15	Walker County	98	-24
16	Floyd County	95	-4
17	Columbia County	93	-58
17	Murray County	93	-26
17	Paulding County	93	-40
20	Clarke County	92	-61
21	Hall County	91	+13
22	Chatham County	90	-17
23	Houston County	88	-54
24	Washington County	82	+9
25	Glynn County	80	-9
25	Sumter County	80	-17
27	Chattooga County	77	-31
27	Wilkinson County	77	-4
29	Coweta County	74	-38
30	Clayton County	70	-7
31	Charlton County	67	0
32	Coffee County	64	-1

Other periods

About this ranking

Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.

A single day decides the value, so one wildfire or dust event can set it. Dust from the dry Owens Lake bed puts Inyo and Mono counties in California in the thousands. 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: highest 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: highest daily AQI (Counties in Georgia by highest daily 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: highest daily AQI, Counties in Georgia by highest daily 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/highest-daily-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: highest daily AQI. Counties in Georgia by highest daily 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/highest-daily-air-quality-index/georgia-counties?period=2013.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Counties in Georgia by highest daily 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/highest-daily-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: highest daily AQI: Counties in Georgia by highest daily 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/highest-daily-air-quality-index/georgia-counties?period=2013. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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: highest daily AQI: Counties in Georgia by highest daily 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/highest-daily-air-quality-index/georgia-counties?period=2013
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/highest-daily-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: highest daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -

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rank_places {"indicator":"aqi_max","level":"province","within":"Georgia","limit":10}
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Questions

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

Fulton County, with 177 in 2013, according to the U.S. Environmental Protection Agency.

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

Coffee County, with 64 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: highest daily AQI. Retrieved 2026-10-12. 7 counties have no value for 2013 and are not ranked.