Data / Rankings / Median Air Quality Index (US EPA) / Counties in Florida

Counties in Florida by median Air Quality Index (US EPA)

Miami-Dade County had the highest median Air Quality Index (US EPA) of 39 counties in 2016, at 52. Putnam County had the lowest, at 14. The median was 43. Source: the U.S. Environmental Protection Agency.

Keep it in a collection in your library.
Highest52Miami-Dade County
Lowest14Putnam County
Median4339 counties

Map of counties, 2016

Alachua County: 42 indexBaker County: 34 indexBay County: 43 indexBrevard County: 42 indexBroward County: 47 indexCitrus County: 45 indexCollier County: 43 indexColumbia County: 43 indexDuval County: 48 indexEscambia County: 44 indexFlagler County: 35 indexHamilton County: 44 indexHighlands County: 33 indexHillsborough County: 51 indexHolmes County: 46 indexIndian River County: 39 indexLake County: 37 indexLee County: 42 indexLeon County: 48 indexLiberty County: 33 indexManatee County: 36 indexMarion County: 43 indexMartin County: 41 indexMiami-Dade County: 52 indexNassau County: 45 indexOkaloosa County: 36 indexOrange County: 47 indexOsceola County: 35 indexPalm Beach County: 47 indexPasco County: 37 indexPinellas County: 45 indexPolk County: 44 indexPutnam County: 14 indexSt. Lucie County: 37 indexSanta Rosa County: 43 indexSarasota County: 47 indexSeminole County: 38 indexVolusia County: 42 indexWakulla County: 41 index
  • Under 36
  • 36 to 40
  • 40 to 43
  • 43 to 44
  • 44 to 47
  • 47 and over
  • No data
index, 2016. Hatched areas have no value for this period. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2016

Miami-Dade County: 52 indexMiami-Dade County52Hillsborough County: 51 indexHillsborough County51Duval County: 48 indexDuval County48Leon County: 48 indexLeon County48Broward County: 47 indexBroward County47Orange County: 47 indexOrange County47Palm Beach County: 47 indexPalm Beach County47Sarasota County: 47 indexSarasota County47Holmes County: 46 indexHolmes County46Citrus County: 45 indexCitrus County45Nassau County: 45 indexNassau County45Pinellas County: 45 indexPinellas County45Escambia County: 44 indexEscambia County44Hamilton County: 44 indexHamilton County44Polk County: 44 indexPolk County44Bay County: 43 indexBay County43Collier County: 43 indexCollier County43Columbia County: 43 indexColumbia County43Marion County: 43 indexMarion County43Santa Rosa County: 43 indexSanta Rosa County43Alachua County: 42 indexAlachua County42Brevard County: 42 indexBrevard County42Lee County: 42 indexLee County42Volusia County: 42 indexVolusia County42Martin County: 41 indexMartin County41Wakulla County: 41 indexWakulla County41Indian River County: 39 indexIndian River County39Seminole County: 38 indexSeminole County38Lake County: 37 indexLake County37Pasco County: 37 indexPasco County37St. Lucie County: 37 indexSt. Lucie County37Manatee County: 36 indexManatee County36Okaloosa County: 36 indexOkaloosa County36Flagler County: 35 indexFlagler County35Osceola County: 35 indexOsceola County35Baker County: 34 indexBaker County34Highlands County: 33 indexHighlands County33Liberty County: 33 indexLiberty County33Putnam County: 14 indexPutnam County14Miami-Dade County: 52 indexMiami-Dade County52Hillsborough County: 51 indexHillsborough County51Duval County: 48 indexDuval County48Leon County: 48 indexLeon County48Broward County: 47 indexBroward County47Orange County: 47 indexOrange County47Palm Beach County: 47 indexPalm Beach County47Sarasota County: 47 indexSarasota County47Holmes County: 46 indexHolmes County46Citrus County: 45 indexCitrus County45Nassau County: 45 indexNassau County45Pinellas County: 45 indexPinellas County45Escambia County: 44 indexEscambia County44Hamilton County: 44 indexHamilton County44Polk County: 44 indexPolk County44Bay County: 43 indexBay County43Collier County: 43 indexCollier County43Columbia County: 43 indexColumbia County43Marion County: 43 indexMarion County43Santa Rosa County: 43 indexSanta Rosa County43Alachua County: 42 indexAlachua County42Brevard County: 42 indexBrevard County42Lee County: 42 indexLee County42Volusia County: 42 indexVolusia County42Martin County: 41 indexMartin County41Wakulla County: 41 indexWakulla County41Indian River County: 39 indexIndian River County39Seminole County: 38 indexSeminole County38Lake County: 37 indexLake County37Pasco County: 37 indexPasco County37St. Lucie County: 37 indexSt. Lucie County37Manatee County: 36 indexManatee County36Okaloosa County: 36 indexOkaloosa County36Flagler County: 35 indexFlagler County35Osceola County: 35 indexOsceola County35Baker County: 34 indexBaker County34Highlands County: 33 indexHighlands County33Liberty County: 33 indexLiberty County33Putnam County: 14 indexPutnam County14
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12.

Full ranking

RankCounties2016
index		Change on 2015
1Miami-Dade County52+3
2Hillsborough County51-1
3Duval County48+4
3Leon County48-3
5Broward County47+8
5Orange County47+3
5Palm Beach County47+5
5Sarasota County47+1
9Holmes County46+3
10Citrus County45+13
10Nassau County45+2
10Pinellas County45+2
13Escambia County44-2
13Hamilton County44+2
13Polk County440
16Bay County430
16Collier County43+4
16Columbia County43+4
16Marion County43+3
16Santa Rosa County43-1
21Alachua County42+3
21Brevard County42+3
21Lee County42+2
21Volusia County42+2
25Martin County41+2
25Wakulla County41-1
27Indian River County39+5
28Seminole County38+3
29Lake County37+3
29Pasco County370
29St. Lucie County37+5
32Manatee County36+2
32Okaloosa County36+3
34Flagler County35+2
34Osceola County35+3
36Baker County34+2
37Highlands County33+2
37Liberty County33+2
39Putnam County14+1

Other periods

About this ranking

Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries.

More on how it is measured
  • The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide).
  • Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.

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: median 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: median daily AQI (Counties in Florida by median Air Quality Index (US EPA), 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: median daily AQI, Counties in Florida by median Air Quality Index (US EPA), 2016. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/median-air-quality-index/florida-counties?period=2016. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Counties in Florida by median Air Quality Index (US EPA), 2016. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/median-air-quality-index/florida-counties?period=2016.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Counties in Florida by median Air Quality Index (US EPA), 2016 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/median-air-quality-index/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: median daily AQI: Counties in Florida by median Air Quality Index (US EPA), 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/median-air-quality-index/florida-counties?period=2016. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median 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: median daily AQI: Counties in Florida by median Air Quality Index (US EPA), 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/median-air-quality-index/florida-counties?period=2016
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-air-quality-index/florida-counties?period=2016.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. 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 median Air Quality Index (US EPA) using official data, and cite the source.
rank_places {"indicator":"aqi_median","level":"province","within":"Florida","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=aqi_median&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 median Air Quality Index (US EPA)?

Miami-Dade County, with 52 in 2016, according to the U.S. Environmental Protection Agency.

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

Putnam County, with 14 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: median daily AQI. Retrieved 2026-10-12. 3 counties have no value for 2016 and are not ranked.

Median Air Quality Index (US EPA): other rankings

Counties in Florida: more rankings