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 2016, at 100%. Miami-Dade County had the lowest, at 42.5%. The median was 76.2%. Source: EPA.

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Highest100Putnam County
Lowest42.5Miami-Dade County
Median76.239 counties

Map of counties, 2016

Alachua County: 77.2 %Baker County: 93.3 %Bay County: 76.2 %Brevard County: 81.4 %Broward County: 58.8 %Citrus County: 62.1 %Collier County: 78.1 %Columbia County: 68.1 %Duval County: 57.4 %Escambia County: 71 %Flagler County: 95.6 %Hamilton County: 67.2 %Highlands County: 95.6 %Hillsborough County: 48.6 %Holmes County: 59.8 %Indian River County: 92.9 %Lake County: 89.5 %Lee County: 77 %Leon County: 56.5 %Liberty County: 97.4 %Manatee County: 93.7 %Marion County: 69.4 %Martin County: 77.1 %Miami-Dade County: 42.5 %Nassau County: 63.8 %Okaloosa County: 94.5 %Orange County: 58.5 %Osceola County: 93.4 %Palm Beach County: 56.8 %Pasco County: 89.6 %Pinellas County: 67.5 %Polk County: 68.6 %Putnam County: 100 %St. Lucie County: 93.9 %Santa Rosa County: 73 %Sarasota County: 60.9 %Seminole County: 89 %Volusia County: 76.9 %Wakulla County: 73.6 %
  • Under 59
  • 59 to 68
  • 68 to 76
  • 76 to 84
  • 84 to 94
  • 94 and over
  • No data
%, 2016. 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, 2016

Putnam County: 100 %Putnam County100Liberty County: 97.4 %Liberty County97.4Flagler County: 95.6 %Flagler County95.6Highlands County: 95.6 %Highlands County95.6Okaloosa County: 94.5 %Okaloosa County94.5St. Lucie County: 93.9 %St. Lucie County93.9Manatee County: 93.7 %Manatee County93.7Osceola County: 93.4 %Osceola County93.4Baker County: 93.3 %Baker County93.3Indian River County: 92.9 %Indian River County92.9Pasco County: 89.6 %Pasco County89.6Lake County: 89.5 %Lake County89.5Seminole County: 89 %Seminole County89Brevard County: 81.4 %Brevard County81.4Collier County: 78.1 %Collier County78.1Alachua County: 77.2 %Alachua County77.2Martin County: 77.1 %Martin County77.1Lee County: 77 %Lee County77Volusia County: 76.9 %Volusia County76.9Bay County: 76.2 %Bay County76.2Wakulla County: 73.6 %Wakulla County73.6Santa Rosa County: 73 %Santa Rosa County73Escambia County: 71 %Escambia County71Marion County: 69.4 %Marion County69.4Polk County: 68.6 %Polk County68.6Columbia County: 68.1 %Columbia County68.1Pinellas County: 67.5 %Pinellas County67.5Hamilton County: 67.2 %Hamilton County67.2Nassau County: 63.8 %Nassau County63.8Citrus County: 62.1 %Citrus County62.1Sarasota County: 60.9 %Sarasota County60.9Holmes County: 59.8 %Holmes County59.8Broward County: 58.8 %Broward County58.8Orange County: 58.5 %Orange County58.5Duval County: 57.4 %Duval County57.4Palm Beach County: 56.8 %Palm Beach County56.8Leon County: 56.5 %Leon County56.5Hillsborough County: 48.6 %Hillsborough County48.6Miami-Dade County: 42.5 %Miami-Dade County42.5Putnam County: 100 %Putnam County100Liberty County: 97.4 %Liberty County97.4Flagler County: 95.6 %Flagler County95.6Highlands County: 95.6 %Highlands County95.6Okaloosa County: 94.5 %Okaloosa County94.5St. Lucie County: 93.9 %St. Lucie County93.9Manatee County: 93.7 %Manatee County93.7Osceola County: 93.4 %Osceola County93.4Baker County: 93.3 %Baker County93.3Indian River County: 92.9 %Indian River County92.9Pasco County: 89.6 %Pasco County89.6Lake County: 89.5 %Lake County89.5Seminole County: 89 %Seminole County89Brevard County: 81.4 %Brevard County81.4Collier County: 78.1 %Collier County78.1Alachua County: 77.2 %Alachua County77.2Martin County: 77.1 %Martin County77.1Lee County: 77 %Lee County77Volusia County: 76.9 %Volusia County76.9Bay County: 76.2 %Bay County76.2Wakulla County: 73.6 %Wakulla County73.6Santa Rosa County: 73 %Santa Rosa County73Escambia County: 71 %Escambia County71Marion County: 69.4 %Marion County69.4Polk County: 68.6 %Polk County68.6Columbia County: 68.1 %Columbia County68.1Pinellas County: 67.5 %Pinellas County67.5Hamilton County: 67.2 %Hamilton County67.2Nassau County: 63.8 %Nassau County63.8Citrus County: 62.1 %Citrus County62.1Sarasota County: 60.9 %Sarasota County60.9Holmes County: 59.8 %Holmes County59.8Broward County: 58.8 %Broward County58.8Orange County: 58.5 %Orange County58.5Duval County: 57.4 %Duval County57.4Palm Beach County: 56.8 %Palm Beach County56.8Leon County: 56.5 %Leon County56.5Hillsborough County: 48.6 %Hillsborough County48.6Miami-Dade County: 42.5 %Miami-Dade County42.5
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2016 (%)Change on 2015
1Putnam County1000 pts
2Liberty County97.4-0.6 pts
3Flagler County95.6-3 pts
3Highlands County95.6-1.3 pts
5Okaloosa County94.5-2.5 pts
6St. Lucie County93.9-3.5 pts
7Manatee County93.7+1.6 pts
8Osceola County93.4-3.2 pts
9Baker County93.3-4.5 pts
10Indian River County92.9-3.2 pts
11Pasco County89.6-4.4 pts
12Lake County89.5-5.8 pts
13Seminole County89-3.5 pts
14Brevard County81.4-3.3 pts
15Collier County78.1+1.2 pts
16Alachua County77.2-2.5 pts
17Martin County77.1+0.1 pts
18Lee County77+1.4 pts
19Volusia County76.9-3.9 pts
20Bay County76.2+6.6 pts
21Wakulla County73.6+4.4 pts
22Santa Rosa County73+7.8 pts
23Escambia County71+12.9 pts
24Marion County69.4-5.9 pts
25Polk County68.6+0.7 pts
26Columbia County68.1-9.5 pts
27Pinellas County67.5-2.1 pts
28Hamilton County67.2-0.3 pts
29Nassau County63.8-5.4 pts
30Citrus County62.1-23.1 pts
31Sarasota County60.9-1.3 pts
32Holmes County59.8-5.3 pts
33Broward County58.8-19.6 pts
34Orange County58.5-7 pts
35Duval County57.4-8.6 pts
36Palm Beach County56.8-10.9 pts
37Leon County56.5+8.8 pts
38Hillsborough County48.6+4.5 pts
39Miami-Dade County42.5-12.6 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 2016 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), 2016) [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), 2016. 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=2016. 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), 2016. 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=2016.

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), 2016 [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=2016 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_florida_by_2016,
  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), 2016}},
  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=2016. 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), 2016
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=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/florida-counties?period=2016.
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)?

Putnam County, with 100% in 2016, according to EPA.

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

Miami-Dade County, with 42.5% in 2016.

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 2016 and are not ranked.

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

Counties in Florida: more rankings