Worst air pollution Biscayne, today and tomorrow
Today (20 September): Air quality in Biscayne is very poor. AQI and PM10 are very poor; PM2.5 is moderate; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (PM10: 100/100).
Tomorrow (21 September 2026): Air quality in Biscayne is very poor. All pollutants stay as today. Pollution peaks around 11:00 PM (PM10: 96.0/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Biscayne National Park's air quality benefits from its exceptional Biscayne Bay and Florida Reef island position, with consistent Atlantic and Gulf trade winds providing outstanding maritime ventilation across the extraordinary coral reef and mangrove wilderness. The remote island wilderness and the dual-water exposure generally maintain excellent conditions, while the Miami metropolitan area's regional background affects the bay's northern margin and the extraordinary reef wilderness otherwise maintains very good conditions throughout most of the year.
Today - 20 September | Pollution peaks at 10:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Moderate
41.9/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Good
12.4/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
1.5/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 23:00
AQI:
Very poor
96.0/100
PM2.5 (fine particles):
Moderate
43.0/100
PM10 (coarse particles):
Very poor
96.0/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Good
14.5/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
2.1/100
Frequently Asked Questions
Is air quality bad in Biscayne right now?
On 20 September 2026, overall air quality in Biscayne is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 10:00 AM (PM10: 100/100).
Will air quality be worse tomorrow in Biscayne?
On 21 September 2026, air quality conditions in Biscayne will be similar to today, with AQI forecast at very poor at 96.0/100. Pollution peaks around 11:00 PM (PM10: 96.0/100).
When is air pollution at its worst in Biscayne?
Air quality around Biscayne National Park changes with the seasons — the wet season's frequent storms generally keep particulate levels lower than in the dry months, whereas dry-season wildfire and prescribed-burn smoke, mainly from late autumn through spring, is the main seasonal concern. Inland areas tend to see more smoke buildup than locations closer to the coast.
Are air quality levels in Biscayne based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 20 September 2026 at 14:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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