All official European Union website addresses are in the europa.eu domain.
See all EU institutions and bodies
An official website of the European Union | How do you know?
Environmental information systems
The maps show the 90.4th percentile of PM10 daily mean concentrations. The 90.4th percentile represents the 36th-highest value in a complete series. It is related to the PM10 daily limit value, allowing 35 exceedances of the 50µg/m3 threshold over 1 year.