Data / Rankings / Share of days with good air quality (US EPA AQI) / Counties in Florida

Counties in Florida by share of days with good air quality (US EPA AQI)

Liberty County had the highest share of days with good air quality (US EPA AQI) of 38 counties in 2024, at 99.1%. Duval County had the lowest, at 51.9%. The median was 75.9%. Source: EPA.

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Highest99.1Liberty County
Lowest51.9Duval County
Median75.938 counties

Map of counties, 2024

Alachua County: 86 %Baker County: 77.7 %Bay County: 60.1 %Brevard County: 85 %Broward County: 58.2 %Citrus County: 71.9 %Collier County: 76.2 %Columbia County: 63 %Duval County: 51.9 %Escambia County: 69.9 %Flagler County: 97.2 %Hamilton County: 67.4 %Highlands County: 91.7 %Hillsborough County: 52.5 %Holmes County: 60.2 %Indian River County: 98.9 %Lake County: 90.7 %Lee County: 92.1 %Leon County: 68.5 %Liberty County: 99.1 %Manatee County: 91.1 %Marion County: 52.5 %Martin County: 86.6 %Miami-Dade County: 59.8 %Okaloosa County: 93.2 %Orange County: 75.6 %Osceola County: 90 %Palm Beach County: 70.2 %Pasco County: 90.4 %Pinellas County: 59.2 %Polk County: 77.3 %Putnam County: 90.9 %St. Lucie County: 97.5 %Santa Rosa County: 64.2 %Sarasota County: 67.2 %Seminole County: 71.3 %Volusia County: 81.4 %Wakulla County: 73.3 %
  • Under 60
  • 60 to 69
  • 69 to 76
  • 76 to 86
  • 86 to 92
  • 92 and over
  • No data
%, 2024. 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, 2024

Liberty County: 99.1 %Liberty County99.1Indian River County: 98.9 %Indian River County98.9St. Lucie County: 97.5 %St. Lucie County97.5Flagler County: 97.2 %Flagler County97.2Okaloosa County: 93.2 %Okaloosa County93.2Lee County: 92.1 %Lee County92.1Highlands County: 91.7 %Highlands County91.7Manatee County: 91.1 %Manatee County91.1Putnam County: 90.9 %Putnam County90.9Lake County: 90.7 %Lake County90.7Pasco County: 90.4 %Pasco County90.4Osceola County: 90 %Osceola County90Martin County: 86.6 %Martin County86.6Alachua County: 86 %Alachua County86Brevard County: 85 %Brevard County85Volusia County: 81.4 %Volusia County81.4Baker County: 77.7 %Baker County77.7Polk County: 77.3 %Polk County77.3Collier County: 76.2 %Collier County76.2Orange County: 75.6 %Orange County75.6Wakulla County: 73.3 %Wakulla County73.3Citrus County: 71.9 %Citrus County71.9Seminole County: 71.3 %Seminole County71.3Palm Beach County: 70.2 %Palm Beach County70.2Escambia County: 69.9 %Escambia County69.9Leon County: 68.5 %Leon County68.5Hamilton County: 67.4 %Hamilton County67.4Sarasota County: 67.2 %Sarasota County67.2Santa Rosa County: 64.2 %Santa Rosa County64.2Columbia County: 63 %Columbia County63Holmes County: 60.2 %Holmes County60.2Bay County: 60.1 %Bay County60.1Miami-Dade County: 59.8 %Miami-Dade County59.8Pinellas County: 59.2 %Pinellas County59.2Broward County: 58.2 %Broward County58.2Hillsborough County: 52.5 %Hillsborough County52.5Marion County: 52.5 %Marion County52.5Duval County: 51.9 %Duval County51.9Liberty County: 99.1 %Liberty County99.1Indian River County: 98.9 %Indian River County98.9St. Lucie County: 97.5 %St. Lucie County97.5Flagler County: 97.2 %Flagler County97.2Okaloosa County: 93.2 %Okaloosa County93.2Lee County: 92.1 %Lee County92.1Highlands County: 91.7 %Highlands County91.7Manatee County: 91.1 %Manatee County91.1Putnam County: 90.9 %Putnam County90.9Lake County: 90.7 %Lake County90.7Pasco County: 90.4 %Pasco County90.4Osceola County: 90 %Osceola County90Martin County: 86.6 %Martin County86.6Alachua County: 86 %Alachua County86Brevard County: 85 %Brevard County85Volusia County: 81.4 %Volusia County81.4Baker County: 77.7 %Baker County77.7Polk County: 77.3 %Polk County77.3Collier County: 76.2 %Collier County76.2Orange County: 75.6 %Orange County75.6Wakulla County: 73.3 %Wakulla County73.3Citrus County: 71.9 %Citrus County71.9Seminole County: 71.3 %Seminole County71.3Palm Beach County: 70.2 %Palm Beach County70.2Escambia County: 69.9 %Escambia County69.9Leon County: 68.5 %Leon County68.5Hamilton County: 67.4 %Hamilton County67.4Sarasota County: 67.2 %Sarasota County67.2Santa Rosa County: 64.2 %Santa Rosa County64.2Columbia County: 63 %Columbia County63Holmes County: 60.2 %Holmes County60.2Bay County: 60.1 %Bay County60.1Miami-Dade County: 59.8 %Miami-Dade County59.8Pinellas County: 59.2 %Pinellas County59.2Broward County: 58.2 %Broward County58.2Hillsborough County: 52.5 %Hillsborough County52.5Marion County: 52.5 %Marion County52.5Duval County: 51.9 %Duval County51.9
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2024 (%)Change on 2023
1Liberty County99.1+1.1 pts
2Indian River County98.9+1.1 pts
3St. Lucie County97.50 pts
4Flagler County97.2-0.1 pts
5Okaloosa County93.2+2.7 pts
6Lee County92.1-2.4 pts
7Highlands County91.7-4.1 pts
8Manatee County91.1-2.3 pts
9Putnam County90.9-8.8 pts
10Lake County90.7-1.9 pts
11Pasco County90.4+1.9 pts
12Osceola County90-2.7 pts
13Martin County86.6+9.1 pts
14Alachua County86+12 pts
15Brevard County85+8.6 pts
16Volusia County81.4+9.6 pts
17Baker County77.7+9.6 pts
18Polk County77.3+2 pts
19Collier County76.2+4.3 pts
20Orange County75.6+2.4 pts
21Wakulla County73.3-1.2 pts
22Citrus County71.9+6.7 pts
23Seminole County71.3-10.8 pts
24Palm Beach County70.2-1 pts
25Escambia County69.9+21.1 pts
26Leon County68.5+12 pts
27Hamilton County67.4+7.3 pts
28Sarasota County67.2+3.6 pts
29Santa Rosa County64.2+7.5 pts
30Columbia County63+4.6 pts
31Holmes County60.2+8.4 pts
32Bay County60.1+11.9 pts
33Miami-Dade County59.8+3.1 pts
34Pinellas County59.2-0.3 pts
35Broward County58.2+14.9 pts
36Hillsborough County52.5+9.8 pts
36Marion County52.5-13.5 pts
38Duval County51.9+9.2 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 2024 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 Florida by share of days with good air quality (US EPA AQI), 2024) [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 Florida by share of days with good air quality (US EPA AQI), 2024. 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/florida-counties?period=2024. 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 Florida by share of days with good air quality (US EPA AQI), 2024. 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/florida-counties?period=2024.

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 Florida by share of days with good air quality (US EPA AQI), 2024 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/florida-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_florida_by_2024,
  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 Florida by share of days with good air quality (US EPA AQI), 2024}},
  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/florida-counties?period=2024. 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 Florida by share of days with good air quality (US EPA AQI), 2024
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/florida-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/florida-counties?period=2024.
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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Rank Counties in Florida by share of days with good air quality (US EPA AQI) using official data, and cite the source.
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Questions

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

Liberty County, with 99.1% in 2024, according to EPA.

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

Duval County, with 51.9% in 2024.

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 2024 and are not ranked.

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

Counties in Florida: more rankings