Worst air pollution Alcobendas, today and tomorrow
Today (20 September): Air quality in Alcobendas is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 35.0/100).
Tomorrow (21 September 2026): Air quality in Alcobendas is fair. All pollutants stay as today. Pollution peaks around 6:00 PM (O3: 39.0/100). 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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Alcobendas' air quality reflects the northern Madrid metropolitan technology corridor, with vehicle traffic on the M-11 and A-1 motorways and surrounding pharmaceutical and technology companies contributing industrial emissions. The Madrid basin's winter temperature inversion affects the northern corridor, while the flat Castilian Meseta north of the city provides some dispersal on northerly wind days.
Today - 20 September | Pollution peaks at 18:00
AQI:
Fair
35.0/100
PM2.5 (fine particles):
Good
17.0/100
PM10 (coarse particles):
Good
8.9/100
NO2 (nitrogen dioxide):
Good
12.5/100
O3 (ozone):
Fair
35.0/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
2.9/100
PM1 (ultrafine particles):
Good
7.5/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 18:00
AQI:
Fair
39.0/100
PM2.5 (fine particles):
Good
13.2/100
PM10 (coarse particles):
Good
6.0/100
NO2 (nitrogen dioxide):
Good
18.0/100
O3 (ozone):
Fair
39.0/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.5/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
5.5/100
Pollen forecast in Alcobendas
View pollen forecastFrequently Asked Questions
Is air quality bad in Alcobendas right now?
On 20 September 2026, overall air quality in Alcobendas is fair. AQI is the main air quality indicator at 35.0/100. Pollution peaks around 6:00 PM (O3: 35.0/100).
Will air quality be worse tomorrow in Alcobendas?
On 21 September 2026, air quality conditions in Alcobendas will be similar to today, with AQI forecast at fair at 39.0/100. Pollution peaks around 6:00 PM (O3: 39.0/100).
When is air pollution at its worst in Alcobendas?
What is the yearly air quality pattern like in Alcobendas? Winter mornings are frequently the year's most polluted, as fog and calm conditions trap traffic fumes and smoke from wood stoves close to the ground. By spring, air quality usually starts trending upward as the calm winter inversions give way to more unsettled, breezier weather. High summer temperatures and strong sun exposure drive ozone levels up, occasionally combined with smoke from nearby wildfires during dry spells. The first rains of autumn typically help clear out any lingering summer dust or ozone, setting up milder conditions ahead of winter. Away from the moderating effect of the sea, this area experiences starker seasonal air quality swings than coastal Spain.
Are air quality levels in Alcobendas 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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