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Air quality in Florida

EPA monitors report from 38 of Florida’s 67 counties. That is the honest limit of this page: the other 29 are not measured, not clean. In 2025 the most affected monitored county was Duval County, with 4 days above the moderate category.

38
Counties with monitors
29
Counties without
18
Days above moderate, 2025
Summed across monitored counties
9.4%
Adults with asthma
Population-weighted county estimate

County by county

Monitored Florida counties

GoodModerateUnhealthy for sensitive groupsUnhealthyVery unhealthyHazardous
County90th %ile AQIAbove moderateMax AQI2025 days by category
Duval County624136
Baker County552155
Hillsborough County632122
Citrus County551125
Escambia County571104
Lake County471112
Leon County601140
Marion County571101
Miami-Dade County611113
Orange County581105
Osceola County531105
Pasco County491115
Pinellas County571129
Alachua County51069
Bay County56092
Brevard County50080
Broward County58093
Collier County55071
Columbia County59080
Flagler County45077
Hamilton County57072
Highlands County47080
Holmes County58079
Indian River County48087
Lee County56097
Liberty County44077
Manatee County50097
Martin County55074
Okaloosa County48084
Palm Beach County57087
Polk County460100
Putnam County43069
Santa Rosa County58080
Sarasota County58084
Seminole County54097
St. Lucie County46067
Volusia County53090
Wakulla County54080

EPA Air Quality System annual summaries by county, 2025. The 90th percentile AQI describes a day worse than nine out of ten, which is a steadier measure than the annual maximum a single wildfire can set.

Not measured

29 counties without a monitor

No EPA monitor reported from these counties, so there is no air quality record to publish. Their radon zone is known, and radon is measured in the building rather than the air outside it.

Other states

Air quality elsewhere