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The
directives require Member States to ensure that up-to-date
information on ambient concentrations of the different pollutants
is routinely made available to the public as well as to other
organisations. This is done by providing information on websites,
teletext, in press and also by public displays. The information
needs to be updated as appropriate to the averaging periods.
The relation to the different limit and target values needs
to be clear. When information or alert thresholds are exceeded
Member States need to inform the public about the exceedance
and the actions that are eventually taken. This obligation
is prescribed in detail in the different directives.
On the Community level a number of sources exist that provide information to the public. Several important databases concerning air quality are managed by the European Environment Agency (EEA).