What is the air quality in Alcalá de Henares?

Alcalá de Henares, Spain has an annual US AQI of 55 (Reasonable) and average PM2.5 of 10.8 µg/m³, ranking #1279 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Alcalá de Henares?

November is typically the cleanest month (AQI 49) and July the most polluted (AQI 66).

Where does Alcalá de Henares's air quality data come from?

PM2.5: 1998–2024 (satellite). From satellite data, because no government monitor covers the city. Full sources are on the methodology page.

Alcalá de Henares, Spain — Air Quality & Clean City Guide 2026

Alcalá de Henares Air Quality Data

Global rank	City	Continent	AQI	PM2.5
1279	Alcalá de Henares, Spain	Europe	AQI 55	PM2.5 10.8 µg/m³