Horseshoe Keys, Big Pine Key Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (6 October): Air quality in Horseshoe Keys is very poor. AQI, PM2.5, and PM10 are very poor; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (PM10: 100/100).
Air Quality Tomorrow
Tomorrow (7 October 2026): Air quality in Horseshoe Keys is very poor. All pollutants stay as today. Pollution peaks around 3:00 PM (PM2.5: 100/100).
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Air Quality
Today - 6 October
| Pollen species | Level | Value |
|---|---|---|
| AQI | Very poor | 100/100 |
| PM2.5 (fine particles) | Very poor | 99.0/100 |
| PM10 (coarse particles) | Very poor | 100/100 |
| NO2 (nitrogen dioxide) | Good | 0.1/100 |
| O3 (ozone) | Good | 11.0/100 |
| SO2 (sulfur dioxide) | Good | 0.1/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 0.8/100 |
| PM1 (ultrafine particles) | Good | 3.4/100 |
Tomorrow - 7 October
| Pollen species | Level | Value |
|---|---|---|
| AQI | Very poor | 100/100 |
| PM2.5 (fine particles) | Very poor | 100/100 |
| PM10 (coarse particles) | Very poor | 100/100 |
| NO2 (nitrogen dioxide) | Good | 0.3/100 |
| O3 (ozone) | Good | 10.7/100 |
| SO2 (sulfur dioxide) | Good | 0.2/100 |
| CO (carbon monoxide) | Good | 0.4/100 |
| HCHO (formaldehyde) | Good | 1.1/100 |
| PM1 (ultrafine particles) | Good | 4.8/100 |
Local Environmental Conditions
With little dense development around this location in Big Pine Key, local traffic emissions are modest. Open water nearby lets breezes move freely across the area, helping to disperse pollutants. Air arriving from elsewhere in the region adds to what is produced locally. Levels are generally highest right next to busy roads and drop off quickly with distance.
Warm sunshine all year, around 26°C, can lift ozone on calm afternoons. Short-term changes follow the weather: calm spells raise levels, while breezy or rainy days lower them. Traffic pollution usually peaks during the morning and evening rush hours. A day of steady rain or strong wind typically resets pollution to low levels.
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Frequently Asked Questions About Air Quality in Florida
Is air quality bad in Horseshoe Keys right now?
On 6 October 2026, overall air quality in Horseshoe Keys is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 6:00 AM (PM10: 100/100).
Will air quality be worse tomorrow in Horseshoe Keys?
On 7 October 2026, air quality conditions in Horseshoe Keys will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 3:00 PM (PM2.5: 100/100).
When is air pollution at its worst in Horseshoe Keys?
Warm sunshine all year, around 26°C, can lift ozone on calm afternoons. Short-term changes follow the weather: calm spells raise levels, while breezy or rainy days lower them. Traffic pollution usually peaks during the morning and evening rush hours. A day of steady rain or strong wind typically resets pollution to low levels.
Are air quality levels in Horseshoe Keys 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.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |