The IDAF database presents validated chemical data from the 10 active IDAF sites (see the measurement network for the location of these sites). The database is structured so as to provide the chemical composition data for gas, precipitation and aerosol samples at each site (see available data).

IDAF data are freely available to all registered users through the data portal. Data are distributed according to the IDAF distribution policy. The last year of measurements are made available to the principal investigators and co-investigators of each observation site, but all previous years are open to the entire scientific community.