Measured values for the main air pollutants

Historical series since 2004 of the values recorded for the main air pollutants: fine dust, nitrogen dioxide and ozone. Fine dusts, called PM10 (diameter less than 10 µm), are polluting particles present in the air that can be inhaled and penetrate the upper tract of the respiratory system. The higher the concentration of fine dust in the air the greater the harmful effect on the health of the population. The PM10 concentration thresholds, calculated on a daily and annual basis, are laid down in Legislative Decree 155/2010: the annual limit value for human health protection of 40 µg/m³ and the daily limit value is 50 µg/m³ not to be exceeded more than 35 times/year. Nitrogen dioxide is a toxic gas irritating the mucous membranes and responsible for specific diseases of the respiratory system (bronchitis, allergies, irritations), among the emissive sources vehicular traffic has been identified to be the one that contributes most to the increase in levels in the air. The limit value for the concentration of nitrogen dioxide for the protection of human health calculated on an annual basis and established by Legislative Decree 155/2010 is 40 µg/m³. Ozone is a very toxic pollutant for humans, the effects of ozone range from irritation to throat and respiratory tract to burning eyes; higher concentrations of the pollutant may result in alterations in respiratory function and increased frequency of asthma attacks, especially in sensitive subjects. Ozone is also responsible for damage to vegetation and crops. The assessment of the status of the indicator shall be based on the days of exceeding the long-term target threshold for the protection of human health of 120 µg/m³, calculated as the daily maximum of the 8-hour moving average and the maximum number of exceedances allowed in one year is 25. Original data from http://www.arpalombardia.it This dataset has been issued by the municipality of Milan. The path to use to find the original dataset on sisi.comune.milano.it is: **sisi.comune.milano.it — Environment and Mobility — Environment — Atmospheric pollution**