Global Urban Ambient Air Pollution Database 

The World Health Organization’s (WHO) Ambient Air Quality Database compiles data on ground measurements of annual mean concentrations of nitrogen dioxide (NO2), particulate matter of a diameter equal or smaller than 10 μm (PM10) or equal or smaller than 2.5 μm (PM2.5) which aim at representing an average for the city or town as a whole, rather than for individual stations.

The database covers 3,000 cities in 103 countries and is updated regularly every 2-3 years since 2011. 

World Health Organization (2024, January). WHO Global Urban Ambient Air Pollution Database, V6.1. 

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