Worst air pollution Alcalá de Henares, today and tomorrow
Today (16 July): Air quality in Alcalá de Henares is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 36.2/100).
Tomorrow (17 July 2026): Air quality in Alcalá de Henares is fair. All pollutants stay as today. Pollution peaks around 3:00 PM (O3: 38.9/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Alcalá de Henares' air quality reflects its position in the Henares river corridor east of Madrid, with vehicle traffic on the A-2 national road and the surrounding automotive and pharmaceutical manufacturing industry contributing elevated NOₓ and industrial PM2.5. The Madrid metropolitan basin's temperature inversion problem affects the entire eastern corridor under calm anticyclonic conditions, while the Henares valley provides some limited ventilation on northeasterly wind days throughout the year.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
36.2/100
PM2.5 (fine particles):
Good
15.3/100
PM10 (coarse particles):
Good
12.5/100
NO2 (nitrogen dioxide):
Fair
23.6/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
5.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.2/100
PM1 (ultrafine particles):
Good
10.6/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 15:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
7.2/100
NO2 (nitrogen dioxide):
Fair
23.5/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
3.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
7.8/100
Pollen forecast in Alcalá de Henares
View pollen forecastFrequently Asked Questions
Is air quality bad in Alcalá de Henares right now?
On 16 July 2026, overall air quality in Alcalá de Henares is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 3:00 PM (O3: 36.2/100).
Will air quality be worse tomorrow in Alcalá de Henares?
On 17 July 2026, air quality conditions in Alcalá de Henares will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 3:00 PM (O3: 38.9/100).
When is air pollution at its worst in Alcalá de Henares?
How do the seasons affect air quality in Alcalá de Henares? The winter months typically bring the weakest air quality of the year, as calm anticyclonic conditions trap vehicle and heating pollution near the surface. Conditions tend to ease in spring, as more active weather systems bring the wind and rain needed to disperse ground-level pollution. High summer temperatures and strong sun exposure drive ozone levels up, occasionally combined with smoke from nearby wildfires during dry spells. Autumn is typically a recovery period, with increasing rainfall and cooler air gradually reducing both ozone and traffic-related pollution. Being inland, this area sees more extreme summer heat and winter cold, which sharpens the seasonal contrast in air quality.
Are air quality levels in Alcalá de Henares 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.
Want to see air quality forecasts for other cities in Spain?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 16 July 2026 at 10:33 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.
For long term forecasts and maps, see the Airmine app