Air quality. Time data since 2001

The Comprehensive Air Quality System of the City Council of Madrid allows to know at all times the levels of air pollution in the municipality. In this dataset you can obtain the information collected by air quality monitoring stations, with hourly data by annuities since 2001. (In the current year the information will be updated monthly). The hourly data of the magnitudes correspond to the arithmetic mean of the ten-minute values that are recorded every hour. Other air quality datasets are also available on this portal: Air quality: Real-time data Air quality. Daily data since 2001 Air quality: Control stations You can also find more information about this data in the Transparency Portal > Air .