Map 3: Number of exceedances of the threshold value (background stations)
Map 3: Number of exceedances of the threshold value for the information of the public (1h > 180 µg/m3) observed at background stations. Summer 1996 data (April-July), interpolated using inverse distance weighting and a cut-off distance of 100 km.
For references, please go to http://www.eea.europa.eu/publications/C2I92-9167-074-X/page011.html or scan the QR code.
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