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)

Putnam County had the highest share of days with good air quality (US EPA AQI) of 39 counties in 2014, at 100%. Hillsborough County had the lowest, at 43%. The median was 72.6%. Source: EPA.

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Highest100Putnam County
Lowest43Hillsborough County
Median72.639 counties

Map of counties, 2014

Alachua County: 78.1 %Baker County: 95.9 %Bay County: 60 %Brevard County: 70.4 %Broward County: 68.2 %Citrus County: 80.8 %Collier County: 72.6 %Columbia County: 84.9 %Duval County: 50.1 %Escambia County: 53.2 %Flagler County: 93.1 %Hamilton County: 48.7 %Highlands County: 93.4 %Hillsborough County: 43 %Holmes County: 56.2 %Indian River County: 90.3 %Lake County: 91.4 %Lee County: 72.6 %Leon County: 43.3 %Liberty County: 97.7 %Manatee County: 91.2 %Marion County: 61.4 %Martin County: 76 %Miami-Dade County: 44.1 %Nassau County: 53.4 %Okaloosa County: 92.3 %Orange County: 65.2 %Osceola County: 90.8 %Palm Beach County: 69.3 %Pasco County: 90.7 %Pinellas County: 58.1 %Polk County: 56.6 %Putnam County: 100 %St. Lucie County: 95.3 %Santa Rosa County: 58.4 %Sarasota County: 55.3 %Seminole County: 89.6 %Volusia County: 66.8 %Wakulla County: 86.5 %
  • Under 54
  • 54 to 61
  • 61 to 73
  • 73 to 88
  • 88 to 92
  • 92 and over
  • No data
%, 2014. 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, 2014

Putnam County: 100 %Putnam County100Liberty County: 97.7 %Liberty County97.7Baker County: 95.9 %Baker County95.9St. Lucie County: 95.3 %St. Lucie County95.3Highlands County: 93.4 %Highlands County93.4Flagler County: 93.1 %Flagler County93.1Okaloosa County: 92.3 %Okaloosa County92.3Lake County: 91.4 %Lake County91.4Manatee County: 91.2 %Manatee County91.2Osceola County: 90.8 %Osceola County90.8Pasco County: 90.7 %Pasco County90.7Indian River County: 90.3 %Indian River County90.3Seminole County: 89.6 %Seminole County89.6Wakulla County: 86.5 %Wakulla County86.5Columbia County: 84.9 %Columbia County84.9Citrus County: 80.8 %Citrus County80.8Alachua County: 78.1 %Alachua County78.1Martin County: 76 %Martin County76Collier County: 72.6 %Collier County72.6Lee County: 72.6 %Lee County72.6Brevard County: 70.4 %Brevard County70.4Palm Beach County: 69.3 %Palm Beach County69.3Broward County: 68.2 %Broward County68.2Volusia County: 66.8 %Volusia County66.8Orange County: 65.2 %Orange County65.2Marion County: 61.4 %Marion County61.4Bay County: 60 %Bay County60Santa Rosa County: 58.4 %Santa Rosa County58.4Pinellas County: 58.1 %Pinellas County58.1Polk County: 56.6 %Polk County56.6Holmes County: 56.2 %Holmes County56.2Sarasota County: 55.3 %Sarasota County55.3Nassau County: 53.4 %Nassau County53.4Escambia County: 53.2 %Escambia County53.2Duval County: 50.1 %Duval County50.1Hamilton County: 48.7 %Hamilton County48.7Miami-Dade County: 44.1 %Miami-Dade County44.1Leon County: 43.3 %Leon County43.3Hillsborough County: 43 %Hillsborough County43Putnam County: 100 %Putnam County100Liberty County: 97.7 %Liberty County97.7Baker County: 95.9 %Baker County95.9St. Lucie County: 95.3 %St. Lucie County95.3Highlands County: 93.4 %Highlands County93.4Flagler County: 93.1 %Flagler County93.1Okaloosa County: 92.3 %Okaloosa County92.3Lake County: 91.4 %Lake County91.4Manatee County: 91.2 %Manatee County91.2Osceola County: 90.8 %Osceola County90.8Pasco County: 90.7 %Pasco County90.7Indian River County: 90.3 %Indian River County90.3Seminole County: 89.6 %Seminole County89.6Wakulla County: 86.5 %Wakulla County86.5Columbia County: 84.9 %Columbia County84.9Citrus County: 80.8 %Citrus County80.8Alachua County: 78.1 %Alachua County78.1Martin County: 76 %Martin County76Collier County: 72.6 %Collier County72.6Lee County: 72.6 %Lee County72.6Brevard County: 70.4 %Brevard County70.4Palm Beach County: 69.3 %Palm Beach County69.3Broward County: 68.2 %Broward County68.2Volusia County: 66.8 %Volusia County66.8Orange County: 65.2 %Orange County65.2Marion County: 61.4 %Marion County61.4Bay County: 60 %Bay County60Santa Rosa County: 58.4 %Santa Rosa County58.4Pinellas County: 58.1 %Pinellas County58.1Polk County: 56.6 %Polk County56.6Holmes County: 56.2 %Holmes County56.2Sarasota County: 55.3 %Sarasota County55.3Nassau County: 53.4 %Nassau County53.4Escambia County: 53.2 %Escambia County53.2Duval County: 50.1 %Duval County50.1Hamilton County: 48.7 %Hamilton County48.7Miami-Dade County: 44.1 %Miami-Dade County44.1Leon County: 43.3 %Leon County43.3Hillsborough County: 43 %Hillsborough County43
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2014 (%)Change on 2013
1Putnam County1000 pts
2Liberty County97.7+1.2 pts
3Baker County95.9-1.4 pts
4St. Lucie County95.3n/a
5Highlands County93.4+0.1 pts
6Flagler County93.1-2 pts
7Okaloosa County92.3-3 pts
8Lake County91.4-3.5 pts
9Manatee County91.2-2.2 pts
10Osceola County90.8-2.5 pts
11Pasco County90.7-1.4 pts
12Indian River County90.3-1.2 pts
13Seminole County89.6-0.8 pts
14Wakulla County86.5-4.7 pts
15Columbia County84.9+26.1 pts
16Citrus County80.8+1 pts
17Alachua County78.1+0.7 pts
18Martin County76-0.4 pts
19Collier County72.6+0.3 pts
19Lee County72.6-2.7 pts
21Brevard County70.4-7.7 pts
22Palm Beach County69.3-2.2 pts
23Broward County68.2-0.8 pts
24Volusia County66.8-7.4 pts
25Orange County65.2-4.4 pts
26Marion County61.4-3.8 pts
27Bay County60-2.4 pts
28Santa Rosa County58.4-6 pts
29Pinellas County58.1-2.2 pts
30Polk County56.6-9.7 pts
31Holmes County56.2-5.9 pts
32Sarasota County55.3-5.8 pts
33Nassau County53.4-13.6 pts
34Escambia County53.2-2.1 pts
35Duval County50.1-23.9 pts
36Hamilton County48.7-11 pts
37Miami-Dade County44.1-7.7 pts
38Leon County43.3-22.2 pts
39Hillsborough County43-3.8 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. 3 counties with data in other periods have no value for 2014 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), 2014) [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), 2014. 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=2014. 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), 2014. 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=2014.

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), 2014 [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=2014 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_florida_by_2014,
  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), 2014}},
  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=2014. 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), 2014
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=2014
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/florida-counties?period=2014.
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)?

Putnam County, with 100% in 2014, according to EPA.

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

Hillsborough County, with 43% in 2014.

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. 3 counties have no value for 2014 and are not ranked.

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

Counties in Florida: more rankings