Stations for air quality assessment

Information on the evolution of air quality in Spain from 2001 to the last official assessment of fixed stations that have been used to carry out the assessment in accordance with Directive 2008/50/EC and RD 102/2011 on the improvement of air quality. This information is based on official data and is divided by pollutant and legislated value: SO2 (hourly and daily limit value), NO2 (annual limit value and schedule), PM10 (daily and annual limit value), Pb, C6H6, CO and PM2.5 (annual limit value), O3, As, Cd, Ni and B(a)P (target value). Historical information is presented at two levels: · Air quality stations, where each station’s legislation statisticians are. · Air quality zones, showing the situation of each zone with respect to the legislated values. It should be borne in mind that the situation of the worst season is the one that determines the classification of the area with respect to the legislated values.