# Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe, Division A: Minimum number of sampling points for fixed measurements of concentrations of ozone

Extent: E+W+S+N.I.

Minimum number of sampling points for fixed continuous measurements to assess compliance with target values, long — term objectives and information and alert thresholds where such measurements are the sole source of information.
At least 1 station in areas where exposure of the population to the highest concentrations of ozone is likely to occur. In agglomerations, at least 50 % of the stations shall be located in suburban areas.
1 station per 25 000 km 2 for complex terrain is recommended.
Population (× 1 000 )
Agglomeration
Other zones
Rural background
< 250
1
1 station/ 50 000 km 2 as an average density over all zones per country
< 500
1
2
< 1 000
2
2
< 1 500
3
3
< 2 000
3
4
< 2 750
4
5
< 3 750
5
6
> 3 750
One additional station per 2 million inhabitants
One additional station per 2 million inhabitants

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Source: https://www.legislation.gov.uk/eudr/2008/50/annex/IX/division/A (the official version)
Page: https://openlegislation.uk/eu-directive-2008-50/annex-IX/division-A
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.