Median AQI
44
Good
Florida · County air quality · 2025
Santa Rosa County, Florida
Median AQI 44 (Good). 70.7% of monitored days rated Good, direct from EPA Air Quality System stations.
- 44
- Median AQI
- 70.7%
- Good-air days
- 0
- Unhealthy days
- 34%
- Cleaner than US counties
Santa Rosa County's 2025 annual median AQI is 44 (Good), with 70.7% Good days
According to the U.S. EPA Air Quality System, Santa Rosa County, Florida posted a 2025 median AQI of 44 (Good) across 365 monitored days, with 70.7% rated Good and 0 unhealthy or worse. This is an annual comparison, not today's advisory.
Data source EPA Air Quality System (AQS)
- Cleaner than US
- Santa Rosa County's 70.7% Good-day share places it cleaner than 34% of US counties in 2025.
- Closest median-AQI peer
- Allegan County (63.9% Good, median AQI 44) is the closest nationwide median-AQI peer to Santa Rosa County.
- 2020–2025 trend
- Santa Rosa County's floor-qualifying Good-day share is improving from 2020 to 2025 (61.1% → 70.7%).
- Median AQI
- Median AQI: 44
The verdict
According to EPA Air Quality System monitoring data, Santa Rosa County's air is good on balance, more polluted than the median US county, a median AQI of 44 with 70.7% of 365 monitored days in the Good band, driven mainly by PM2.5.
- 44
- median AQI · Good
- 70.7%
- days rated Good
- PM2.5
- main pollutant
- 34%
- cleaner than US counties
Not one day crossed into the Unhealthy tier; the worst single reading was AQI 80.
Annual release change
What changed in the 2025 EPA annual release
- Santa Rosa County's Good-day share rose from 64.2% to 70.7% between the 2024 and 2025 EPA annual releases, a change of +6.5 percentage points.
Data updated August 2026
- Good · 258 d · 70.7%
- Moderate · 107 d · 29.3%
How did Santa Rosa County's air break down in 2025?
Across 365 monitored days, 258 fell in the Good band (AQI 0–50) and 0 reached Unhealthy or worse. The worst single day peaked at AQI 80 (Moderate).
EPA AQS →Air quality data from EPA Air Quality System (2025). 365 days monitored. Median AQI: 44 (Good).
Insights: Santa Rosa County, Florida. EPA monitors recorded a median Air Quality Index of 44 across 365 measured days in 2025, earning a Good classification and a Moderate health grade. Of those days, 258 (71%) fell in the Good band (AQI 0–50), 107 (29%) registered Moderate readings, and 0 (0%) reached Unhealthy for Sensitive Groups. The 90th-percentile AQI settled at 58, while the worst single-day peak hit 80 (Moderate). Residents averaged about 21.2 clean-air days per 30-day window during the monitoring year.
The full pollutant mix ranks as PM2.5 (214 days), Ozone (151 days). Across the 2020–2025 trend window, the share of monitored days rated Good shifted by +9.6 points and the median AQI moved -3 points, placing the multi-year trajectory at improving. The worst single reading over the 2020–2025 window was AQI 80, moderate but never Unhealthy. Nearby counties show comparable readings: Alachua (88.7% good, AQI 37); Baker (69.5% good, AQI 44); Bay (66.4% good, AQI 44); Brevard (91.2% good, AQI 38); Broward (73.4% good, AQI 43); Citrus (71.1% good, AQI 43).
Air Quality Summary
Good Days
70.7%
258 of 365 monitored days
-4.3pp vs 75% target
Max AQI Recorded
80
Moderate
Health Grade
Moderate
90th-pct AQI 58
Santa Rosa County, Good days share 70.7%
National avg
Share of monitored days at AQI 0-50 (Good band).
Santa Rosa County, Unhealthy-or-worse share 0.0%
National avg
Share of monitored days above AQI 150 (Unhealthy or worse). Bar maxes at 10% (worst-county ceiling).
AQI Day Breakdown (2025)
Distribution of 365 monitored days across EPA AQI categories.
Good
258
71%
Moderate
107
29%
USG
0
0%
Unhealthy
0
0%
Very Unhealthy
0
0%
Hazardous
0
0%
Pollutant Breakdown
Days where each pollutant was the primary driver of AQI readings in Santa Rosa County.
- PM2.5 · 214 days · 58.6%
- Ozone · 151 days · 41.4%
Health Impact Assessment
Moderate
Santa Rosa County's air quality is rated Moderate based on 70.7% good air days. No unhealthy air days were recorded in 2025.
Air quality was acceptable on 70.7% of monitored days in 2025, with a median AQI of 44. Unusually sensitive people can check real-time conditions at AirNow.gov during high-pollution events.
The dominant pollutant is PM2.5, driving AQI on 214 of 365 monitored days.
5-Year Air Quality Trend
Air quality is improving in Santa Rosa County. Highest Good-day share: 2025 (70.7%, 258 of 365 monitored days).
| Year | Good | Moderate | USG | Unhealthy | Median AQI | Max AQI |
|---|---|---|---|---|---|---|
| 2020 | 223 | 142 | 0 | 0 | 47 | 86 |
| 2021 | 254 | 110 | 0 | 0 | 44 | 79 |
| 2022 | 239 | 125 | 1 | 0 | 44 | 109 |
| 2023 | 207 | 157 | 1 | 0 | 47 | 103 |
| 2024 | 235 | 131 | 0 | 0 | 46 | 81 |
| 2025 | 258 | 107 | 0 | 0 | 44 | 80 |
How does Santa Rosa County compare?
How Santa Rosa County compares
Good-day share worse than typical
Santa Rosa County 70.7%
Allegan County, Michigan 63.9%
Typical US county 76.0%
Median AQI worse than typical
Santa Rosa County 44
Allegan County, Michigan 44
Typical US county 39
Unhealthy days / yr better than typical
Santa Rosa County 0
Allegan County, Michigan 2
Typical US county 1
Counties with a similar median AQI
Nationwide peers within about the same annual median AQI as Santa Rosa County (44), not geographic neighbors.
Allegan County, Michigan
Median AQI 44 · 63.9% Good-day share
Allen County, Indiana
Median AQI 44 · 60.0% Good-day share
Baker County, Florida
Median AQI 44 · 69.5% Good-day share
Bay County, Florida
Median AQI 44 · 66.4% Good-day share
Blount County, Tennessee
Median AQI 44 · 71.5% Good-day share
Cache County, Utah
Median AQI 44 · 66.0% Good-day share
Same primary pollutant: PM2.5
PM2.5 led the AQI on the most monitored days here. These peers share that driver and the closest Good-day share (a second relationship type beyond median-AQI neighbors).
Boise County, Idaho
70.4% Good-day share · median AQI 42
Lawrence County, Ohio
71.0% Good-day share · median AQI 42
Orleans County, Louisiana
71.0% Good-day share · median AQI 42
Bay County, Michigan
70.4% Good-day share · median AQI 39
Pottawattamie County, Iowa
70.3% Good-day share · median AQI 37
Tippecanoe County, Indiana
70.3% Good-day share · median AQI 39
Florida counties on the map
Geographic containment only, other monitored counties in Florida, independent of AQI or pollutant match.
What Santa Rosa County's air means for you
The air here stays in the breathable range year-round, with PM2.5 the main thing to watch.
- Sensitive groups (asthma, heart conditions, children, older adults) should check the AQI on high-PM2.5 days, the guide explains what a median of 44 means for exposure. Health guidance
- See how Santa Rosa County ranks against every monitored U.S. county on Good-day share. County rankings
- Compare Santa Rosa County with its Florida neighbours before drawing a conclusion about the region. All of Florida
Based on 365 EPA-monitored days in 2025; figures reflect only days the monitors reported. Source: EPA Air Quality System annual summaries.
Keep exploring the annual AQI record
Air-quality reading list
Frequently Asked Questions
What is the air quality in Santa Rosa County, Florida? ▼
Santa Rosa County has a median Air Quality Index (AQI) of 44, rated "Good." 70.7% of monitored days (258 out of 365) had good air quality in 2025.
What is the main pollutant in Santa Rosa County? ▼
The primary pollutant in Santa Rosa County is Fine Particles (PM2.5), which was the main AQI driver on 214 days (59% of monitored days). Penetrates deep into lungs and bloodstream. Linked to heart disease and premature death.
How many unhealthy air days does Santa Rosa County have? ▼
In 2025, Santa Rosa County recorded 0 unhealthy air days (0 Unhealthy, 0 Very Unhealthy, 0 Hazardous). The maximum AQI reached 80.
Is the air quality in Santa Rosa County getting better or worse? ▼
Air quality in Santa Rosa County is improving across floor-qualifying years (2020-2025); years with fewer than 100 monitored days are excluded from that direction. Highest qualifying Good-day share: 2025 at 70.7% (258 of 365 days). Lowest qualifying Good-day share: 2023 at 56.7% (207 of 365 days).
What does AQI 44 mean for health? ▼
Santa Rosa County's median AQI of 44 falls in the "Good" category. See the AQI category guide for what each range means for health.
How does Santa Rosa County compare to other counties in Florida? ▼
Santa Rosa County has 70.7% good air days. Nearby counties in Florida: Alachua (88.7% good), Baker (69.5% good), Bay (66.4% good), Brevard (91.2% good), Broward (73.4% good), Citrus (71.1% good).
What is the 90th percentile AQI in Santa Rosa County? ▼
The 90th percentile AQI for Santa Rosa County is 58, meaning 90% of monitored days had an AQI at or below this level. The maximum AQI recorded was 80 (Moderate).
Data Sources
Primary Source: U.S. Environmental Protection Agency (EPA), Air Quality System (AQS), Annual AQI by County dataset, 2020–2025 (aqs.epa.gov). For current conditions (not shown here — this page is historical annual data), see EPA AirNow (airnow.gov). See our methodology for how AQI, median, and coverage figures are computed.
Informational only, not professional advice. Data from EPA AQS. See our disclaimer. Spotted a figure that looks wrong? Report a correction.
Source: U.S. EPA Air Quality System (AQS) Annual AQI by county summary files for Santa Rosa County, Florida · 2020–2025
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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.