State air quality · 2025
Florida Air Quality Ranking
Across 38 monitored counties, the typical county in Florida posts a median AQI of 41 (Good) and 77.4% of monitored days were rated Good, from EPA AQS.
- 41
- Avg median AQI
- 77.4%
- Good-air days
- 38
- Counties monitored
- 56%
- Cleaner than US states
Florida's typical county median AQI is 41 (Good) across 38 monitored counties
According to the U.S. EPA Air Quality System, Florida monitors 38 counties with a day-weighted Good-day share of 77.4%. Cleanest: Liberty County (98.5% Good). Most polluted: Duval County (48.0%). These are annual summaries, not live AirNow readings.
Data source EPA Air Quality System (AQS)
- Cleaner than US states
- Florida's day-weighted Good-day share of 77.4% places it cleaner than 56% of US states.
- In-state spread
- Within Florida, Liberty County leads at 98.5% Good days while Duval County sits at 48.0% across 38 monitored counties.
- 2024→2025 release
- Florida's Good-day share moved +0.9 points vs the 2024 EPA annual release.
- Typical median AQI
- Typical median AQI: 41
Verify with AirNow → · EPA AQS →
EPA state monitoring brief
AQS state key FLORIDA
Florida · 2025 EPA AQS · 38 counties · med AQI 41 · 77.4% Good · Liberty→Duval spread
- GOOD 41 Median AQI · Good
- SHARE 77.4% Good-day share
- COUNT 38 Counties monitored
- UNH 1 Unhealthy+ days
- RANK 56% Cleaner than states
- O3 52.2% Main pollutant share
Good-day share peers
Florida's 77.4% Good-day share is cleaner than 56% of monitored US states; Liberty and Duval County bracket the in-state range. Open Liberty County →
According to EPA AQS annual summaries on PlainAirData, Florida ranks #23 of 52 by day-weighted good-day share (77.4%) and #35 by mean county median AQI (40.7). Hawaii is #1 of 52 by day-weighted good-day share (93.8% of monitored days) at mean county median-AQI #4 (27.3) ≠ Alaska #1 lowest mean county median AQI (20.3) at good-day share #8 (84.4%).
Data updated August 2026
What changed, what drives it, and how thick is the sample
Three derived views WPR-style word count does not substitute for: release-over-release movement from county annual rows, the EPA main-pollutant day mix, and how many counties sit below the 100-day ranking floor.
Release change
77.4%
Good-day share in 2025, up 0.9 percentage points vs 2024. County-mean median AQI 41, within half a point of the 2024 county-mean median.
Pollutant mix
Ozone
Main driver on 52.2% of pollutant-assigned days.
- Ozone 52.2%
- PM2.5 44.6%
- PM10 2.9%
- NO2 0.3%
Monitoring coverage
362
Average monitored days per county in the latest release. Every monitored county clears the 100-day ranking floor.
Counties Monitored
38
Good Days %
77.4%
Avg Median AQI
41
Total Unhealthy Days
1
Best Air Quality
Liberty County
Worst Air Quality
Duval County
Where Florida sits nationally
COUNT-derived placement among 52 US states with at least 365 monitored days in the latest county release. Florida's day-weighted Good-day share is 77.4% - cleaner than 56% of that comparison set.
Florida Good-day share vs. every US state
Day-weighted share of monitored days in the Good band (AQI 0–50) - EPA AQS annual release
77.4% Cleaner than 56% higher than 56% of 52 US states
Each bar is a band; taller bars hold more US states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Environmental Protection Agency, Air Quality System (AQS) · 2025
Which counties in Florida have the cleanest and most polluted air?
Cleanest counties in Florida
| County | Good % | Median AQI | Max AQI | Unhealthy Days |
|---|---|---|---|---|
| Liberty | 98.5% | 33 | 77 | 0 |
| Flagler | 98.1% | 34 | 77 | 0 |
| St. Lucie | 96.4% | 34 | 67 | 0 |
| Putnam | 95.6% | 21 | 69 | 0 |
| Polk | 95.5% | 34 | 100 | 0 |
| Lake | 95.0% | 35 | 112 | 0 |
| Highlands | 94.9% | 35 | 80 | 0 |
| Indian River | 94.1% | 37 | 87 | 0 |
| Okaloosa | 93.9% | 36 | 84 | 0 |
| Pasco | 92.6% | 37 | 115 | 0 |
| Brevard | 91.2% | 38 | 80 | 0 |
| Manatee | 91.0% | 36 | 97 | 0 |
| Alachua | 88.7% | 37 | 69 | 0 |
| Seminole | 84.6% | 39 | 97 | 0 |
| Osceola | 83.6% | 40 | 105 | 0 |
| Volusia | 81.4% | 41 | 90 | 0 |
| Martin | 79.5% | 40 | 74 | 0 |
| Lee | 76.4% | 40 | 97 | 0 |
| Palm Beach | 76.4% | 39 | 87 | 0 |
| Wakulla | 75.6% | 41 | 80 | 0 |
| Escambia | 73.7% | 43 | 104 | 0 |
| Broward | 73.4% | 43 | 93 | 0 |
| Orange | 72.9% | 43 | 105 | 0 |
| Collier | 72.0% | 43 | 71 | 0 |
| Citrus | 71.1% | 43 | 125 | 0 |
| Santa Rosa | 70.7% | 44 | 80 | 0 |
| Pinellas | 69.6% | 44 | 129 | 0 |
| Baker | 69.5% | 44 | 155 | 1 |
| Marion | 67.3% | 46 | 101 | 0 |
| Bay | 66.4% | 44 | 92 | 0 |
| Sarasota | 64.7% | 46 | 84 | 0 |
| Hamilton | 60.2% | 46 | 72 | 0 |
| Holmes | 60.0% | 46 | 79 | 0 |
| Columbia | 57.3% | 48 | 80 | 0 |
| Leon | 56.4% | 48 | 140 | 0 |
| Miami-Dade | 56.4% | 47 | 113 | 0 |
| Hillsborough | 53.1% | 49 | 122 | 0 |
| Duval | 48.0% | 51 | 136 | 0 |
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025. See our methodology for how AQI and median figures are computed.
Coverage: 38 counties in Florida with active monitoring stations. Unmonitored counties are not represented.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files, aggregated to the state level · 2020–2025
Every figure on PlainAirData is rendered directly from EPA AQS air-quality monitoring data, no number is typed in by an editor. This page draws directly on EPA AQS air-quality monitoring data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer.