Worst air pollution Horizon West, today and tomorrow
Today (20 September): Air quality in Horizon West is very poor. AQI and PM10 are very poor; PM2.5 is poor; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (PM10: 100/100).
Tomorrow (21 September 2026): Air quality in Horizon West is very poor. PM2.5 increases to very poor; all other pollutants stay as today. Pollution peaks around 6:00 PM (PM2.5: 100/100). 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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Horizon West's air quality reflects the flat Orange County Florida terrain southwest of Orlando, with vehicle emissions from US-192 and SR-429 and the surrounding rapidly expanding resort and residential development contributing local sources. Afternoon sea breezes from both the Atlantic and Gulf coasts converge over central Florida providing reasonable ventilation, while summer ozone from Orlando metropolitan tourism and residential traffic and intense subtropical heat is the primary warm-season concern.
Today - 20 September | Pollution peaks at 18:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Poor
63.1/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
4.5/100
O3 (ozone):
Good
11.7/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.5/100
PM1 (ultrafine particles):
Good
4.8/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 18:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Very poor
100/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
2.6/100
O3 (ozone):
Good
12.2/100
SO2 (sulfur dioxide):
Good
0.2/100
CO (carbon monoxide):
Good
0.4/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
8.8/100
Pollen forecast in Horizon West
View pollen forecastFrequently Asked Questions
Is air quality bad in Horizon West right now?
On 20 September 2026, overall air quality in Horizon West is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 6:00 PM (PM10: 100/100).
Will air quality be worse tomorrow in Horizon West?
On 21 September 2026, air quality conditions in Horizon West will be similar to today, with AQI forecast at very poor at 100/100. Pollution peaks around 6:00 PM (PM2.5: 100/100).
When is air pollution at its worst in Horizon West?
Horizon West's air quality follows a clear seasonal pattern. In short, the wetter summer months often see cleaner air, as frequent afternoon storms wash pollution out quickly, whereas without the wet season's regular storms, dry-season smoke can linger for days at a time. Sea breezes help disperse pollution on most days, though smoke from inland fires can still drift into populated areas.
Are air quality levels in Horizon West 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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