Glen St. Mary, Florida Air Quality
Glen St. Mary has a median AQI of 45, earning an air quality grade of A- — excellent air quality that ranks better than 27% of US cities. Air quality has been trending worse over the past decade, a concern for local residents and health officials. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Glen St. Mary recorded 188 good air quality days (69% of monitored days).
Population: 612 • County: Baker
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Quick Facts
| Current AQI | 27 — Good |
| Air Quality Grade | A- |
| Median AQI (2025) | 45 |
| vs. U.S. Cities | Better than 27% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | ↓ Worsening |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Glen St. Mary Air Quality
What is the air quality in Glen St. Mary today?
The current AQI in Glen St. Mary is 27, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Glen St. Mary getting better or worse?
Air quality in Glen St. Mary has been worsening in recent years. The median AQI rose from 34 in 2016 to 45 in 2025.
What is the most common air pollutant in Glen St. Mary?
PM2.5 is the primary air pollutant in Glen St. Mary, responsible for the most air quality-impacted days in 2025. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Glen St. Mary have per year?
In 2025, Glen St. Mary had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 188 good days and 84 moderate days out of 272 days monitored.
What air quality grade does Glen St. Mary receive?
Glen St. Mary receives an air quality grade of A-, placing it better than 27% of US cities. This grade is based on a median AQI of 45 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 27% of US cities
Nearby Cities
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National Rankings
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Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Glen St. Mary
Based on your area's air quality (median AQI: 45), we recommend these air purifiers to help protect your health indoors.
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Molekule Air Pro
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Blueair Blue Pure 211+
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Dyson Pure Cool TP04
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