What is the air quality in Castanhal?

Castanhal, Brazil has an annual US AQI of 48 (Reasonable) and average PM2.5 of 9.6 µg/m³, ranking #632 of 5856 cities. Main pollutant: PM2.5.

What is the cleanest month in Castanhal?

July is typically the cleanest month (AQI 38) and February the most polluted (AQI 58).

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
632	Castanhal, Brazil	South America	AQI 48	PM2.5 9.6 µg/m³