This dataset contains the hourly averages of all the observations generated by the network of environmental air quality observation processes of the city of Santiago de Compostela, installed by the TRAFAIR project, funded by the Innovation and Networks Executive Agency (INEA) of the European Commission (EC), through its Connecting Europe Facility (CEF) program. Each record contains a reference to the identifier of the observed feature, i.e. the location where the observation was made, the time instant representing the hour, the average of the concentration values for each pollutant, measured in micrograms per cubic meter (ug/m3), during the hour and a coverage measure that provides the percentage of data available to calculate the average, with respect to the total expected for the whole hour. The following pollutants are observed: carbon monoxide (CO), nitrogen monoxide (NO), nitrogen dioxide (NO2) and ozone (O3).
