What is the air quality in Alajuela?

Alajuela, Costa Rica has an annual US AQI of 64 (Polluted) and average PM2.5 of 15.8 µg/m³, ranking #2590 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Alajuela?

January is typically the cleanest month (AQI 57) and July the most polluted (AQI 69).

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

Global rank	City	Continent	AQI	PM2.5
2590	Alajuela, Costa Rica	North America	AQI 64	PM2.5 15.8 µg/m³