Worst air pollution Collado-Villalba, today and tomorrow
Today (30 August): Air quality in Collado-Villalba is moderate. AQI and O3 are moderate; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 40.2/100).
Tomorrow (31 August 2026): Air quality in Collado-Villalba is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 31.0/100). Airmine updates local air quality forecasts four times daily.
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Collado-Villalba's air quality benefits from its elevated position in the Sierra de Guadarrama foothills at 915 metres northwest of Madrid, with clean northwesterly Sierra airflows providing generally better conditions than the central Madrid basin. Vehicle traffic on the A-6 national road is the primary local source, while the elevated mountain position generally helps avoid the worst of Madrid's winter temperature inversion accumulation in the lower metropolitan basin below.
Today - 30 August | Pollution peaks at 17:00
AQI:
Moderate
40.2/100
PM2.5 (fine particles):
Good
5.4/100
PM10 (coarse particles):
Good
2.1/100
NO2 (nitrogen dioxide):
Good
15.3/100
O3 (ozone):
Moderate
40.2/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
3.3/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 17:00
AQI:
Fair
31.0/100
PM2.5 (fine particles):
Good
7.7/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Good
13.4/100
O3 (ozone):
Fair
31.0/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.7/100
PM1 (ultrafine particles):
Good
3.9/100
Pollen forecast in Collado-Villalba
View pollen forecastFrequently Asked Questions
Is air quality bad in Collado-Villalba right now?
On 30 August 2026, overall air quality in Collado-Villalba is moderate. AQI is the main air quality indicator at 40.2/100. Pollution peaks around 5:00 PM (O3: 40.2/100).
Will air quality be worse tomorrow in Collado-Villalba?
On 31 August 2026, air quality conditions in Collado-Villalba will be better than today, with AQI forecast at fair at 31.0/100. Pollution peaks around 5:00 PM (O3: 31.0/100).
When is air pollution at its worst in Collado-Villalba?
How do the seasons affect air quality in Collado-Villalba? Cold, windless spells in December and January are usually when conditions dip most, as heating emissions and traffic fumes accumulate under a stable atmosphere. Spring generally sees a gradual recovery, driven by more frequent rain showers and stronger breezes that prevent pollutants from settling. Summer readings are shaped mainly by ozone, which builds under strong sun and heat, sometimes worsened by drifting wildfire smoke. Autumn typically starts mild and can still see occasional ozone or dust episodes before rain and cooler temperatures gradually restore cleaner conditions. Away from the moderating effect of the sea, this area experiences starker seasonal air quality swings than coastal Spain.
Are air quality levels in Collado-Villalba 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: 30 August 2026 at 14:32 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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