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), 2025

Liberty County had the highest share of days with good air quality (US EPA AQI) of 38 counties in 2025, at 98.5%. Duval County had the lowest, at 47.9%. The median was 76%. Source: EPA.

Keep it in a collection in your library.
Highest98.5Liberty County
Lowest47.9Duval County
Median7638 counties

Map of counties, 2025

Alachua County: 88.7 %Baker County: 69.5 %Bay County: 66.4 %Brevard County: 91.2 %Broward County: 73.4 %Citrus County: 71.1 %Collier County: 72.1 %Columbia County: 57.3 %Duval County: 47.9 %Escambia County: 73.7 %Flagler County: 98.1 %Hamilton County: 60.2 %Highlands County: 94.9 %Hillsborough County: 53.2 %Holmes County: 60 %Indian River County: 94.1 %Lake County: 95 %Lee County: 76.4 %Leon County: 56.4 %Liberty County: 98.5 %Manatee County: 91 %Marion County: 67.3 %Martin County: 79.5 %Miami-Dade County: 56.4 %Okaloosa County: 93.9 %Orange County: 72.9 %Osceola County: 83.6 %Palm Beach County: 76.4 %Pasco County: 92.6 %Pinellas County: 69.6 %Polk County: 95.5 %Putnam County: 95.6 %St. Lucie County: 96.4 %Santa Rosa County: 70.7 %Sarasota County: 64.7 %Seminole County: 84.6 %Volusia County: 81.4 %Wakulla County: 75.6 %
  • Under 61
  • 61 to 71
  • 71 to 76
  • 76 to 87
  • 87 to 95
  • 95 and over
  • No data
%, 2025. 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, 2025

Liberty County: 98.5 %Liberty County98.5Flagler County: 98.1 %Flagler County98.1St. Lucie County: 96.4 %St. Lucie County96.4Putnam County: 95.6 %Putnam County95.6Polk County: 95.5 %Polk County95.5Lake County: 95 %Lake County95Highlands County: 94.9 %Highlands County94.9Indian River County: 94.1 %Indian River County94.1Okaloosa County: 93.9 %Okaloosa County93.9Pasco County: 92.6 %Pasco County92.6Brevard County: 91.2 %Brevard County91.2Manatee County: 91 %Manatee County91Alachua County: 88.7 %Alachua County88.7Seminole County: 84.6 %Seminole County84.6Osceola County: 83.6 %Osceola County83.6Volusia County: 81.4 %Volusia County81.4Martin County: 79.5 %Martin County79.5Lee County: 76.4 %Lee County76.4Palm Beach County: 76.4 %Palm Beach County76.4Wakulla County: 75.6 %Wakulla County75.6Escambia County: 73.7 %Escambia County73.7Broward County: 73.4 %Broward County73.4Orange County: 72.9 %Orange County72.9Collier County: 72.1 %Collier County72.1Citrus County: 71.1 %Citrus County71.1Santa Rosa County: 70.7 %Santa Rosa County70.7Pinellas County: 69.6 %Pinellas County69.6Baker County: 69.5 %Baker County69.5Marion County: 67.3 %Marion County67.3Bay County: 66.4 %Bay County66.4Sarasota County: 64.7 %Sarasota County64.7Hamilton County: 60.2 %Hamilton County60.2Holmes County: 60 %Holmes County60Columbia County: 57.3 %Columbia County57.3Leon County: 56.4 %Leon County56.4Miami-Dade County: 56.4 %Miami-Dade County56.4Hillsborough County: 53.2 %Hillsborough County53.2Duval County: 47.9 %Duval County47.9Liberty County: 98.5 %Liberty County98.5Flagler County: 98.1 %Flagler County98.1St. Lucie County: 96.4 %St. Lucie County96.4Putnam County: 95.6 %Putnam County95.6Polk County: 95.5 %Polk County95.5Lake County: 95 %Lake County95Highlands County: 94.9 %Highlands County94.9Indian River County: 94.1 %Indian River County94.1Okaloosa County: 93.9 %Okaloosa County93.9Pasco County: 92.6 %Pasco County92.6Brevard County: 91.2 %Brevard County91.2Manatee County: 91 %Manatee County91Alachua County: 88.7 %Alachua County88.7Seminole County: 84.6 %Seminole County84.6Osceola County: 83.6 %Osceola County83.6Volusia County: 81.4 %Volusia County81.4Martin County: 79.5 %Martin County79.5Lee County: 76.4 %Lee County76.4Palm Beach County: 76.4 %Palm Beach County76.4Wakulla County: 75.6 %Wakulla County75.6Escambia County: 73.7 %Escambia County73.7Broward County: 73.4 %Broward County73.4Orange County: 72.9 %Orange County72.9Collier County: 72.1 %Collier County72.1Citrus County: 71.1 %Citrus County71.1Santa Rosa County: 70.7 %Santa Rosa County70.7Pinellas County: 69.6 %Pinellas County69.6Baker County: 69.5 %Baker County69.5Marion County: 67.3 %Marion County67.3Bay County: 66.4 %Bay County66.4Sarasota County: 64.7 %Sarasota County64.7Hamilton County: 60.2 %Hamilton County60.2Holmes County: 60 %Holmes County60Columbia County: 57.3 %Columbia County57.3Leon County: 56.4 %Leon County56.4Miami-Dade County: 56.4 %Miami-Dade County56.4Hillsborough County: 53.2 %Hillsborough County53.2Duval County: 47.9 %Duval County47.9
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2025 (%)Change on 2024
1Liberty County98.5-0.6 pts
2Flagler County98.1+0.9 pts
3St. Lucie County96.4-1.1 pts
4Putnam County95.6+4.7 pts
5Polk County95.5+18.2 pts
6Lake County95+4.3 pts
7Highlands County94.9+3.2 pts
8Indian River County94.1-4.8 pts
9Okaloosa County93.9+0.7 pts
10Pasco County92.6+2.2 pts
11Brevard County91.2+6.2 pts
12Manatee County91-0.1 pts
13Alachua County88.7+2.7 pts
14Seminole County84.6+13.3 pts
15Osceola County83.6-6.4 pts
16Volusia County81.40 pts
17Martin County79.5-7.1 pts
18Lee County76.4-15.7 pts
18Palm Beach County76.4+6.2 pts
20Wakulla County75.6+2.3 pts
21Escambia County73.7+3.8 pts
22Broward County73.4+15.2 pts
23Orange County72.9-2.7 pts
24Collier County72.1-4.1 pts
25Citrus County71.1-0.8 pts
26Santa Rosa County70.7+6.5 pts
27Pinellas County69.6+10.4 pts
28Baker County69.5-8.2 pts
29Marion County67.3+14.8 pts
30Bay County66.4+6.3 pts
31Sarasota County64.7-2.5 pts
32Hamilton County60.2-7.2 pts
33Holmes County60-0.2 pts
34Columbia County57.3-5.7 pts
35Leon County56.4-12.1 pts
35Miami-Dade County56.4-3.4 pts
37Hillsborough County53.2+0.7 pts
38Duval County47.9-4 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 2025 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), 2025) [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), 2025. 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. 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), 2025. 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.

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), 2025 [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 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_florida_by_2025,
  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), 2025}},
  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. 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), 2025
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
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/florida-counties.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Florida by share of days with good air quality (US EPA AQI) using official data, and cite the source.
rank_places {"indicator":"aqi_good_days_share","level":"province","within":"Florida","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=aqi_good_days_share&level=province&within=Florida&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

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

Liberty County, with 98.5% in 2025, according to EPA.

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

Duval County, with 47.9% in 2025.

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 2025 and are not ranked.

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

Counties in Florida: more rankings