This directory contains the time series of the (interpolated) yearly indicators of air pollutants (PM10, PM2.5, NO2, O3 and BC), including

- annual mean concentrations in µg/m3
- number of days with exceedances above EU or WHO threshold (day_exc and NET60)

For NO2 and O3 data are available since 1990.
For PM10, PM2.5 data are available since 1997 and 2005 respectively. 
For BC data are available since 2010.

Concentrations are calculated using the 4x4 km2 RIO interpolation model ( https://www.irceline.be/en/documentation/models/models?set_language=en)
The geographical information on the RIO grid is available in the parent directory. Data can be coupled to the 4x4 km2 gridcells via the RIO id.

RIO-version: v50_V2020

update: 30 October 2023