| Layers: | 
 Annual mean nitrogen dioxide 2012, based on daily average with percentage of valid measurements ≥ 75 % in µg/m³(0)  
 Annual mean nickel 2012, based on annual average with percentage of valid measurements ≥ 14 % in µg/m³(1)  
 Annual mean arsenic 2012, based on annual average with percentage of valid measurements ≥ 14 % in µg/m³(2)  
 Annual mean cadmium 2012, based on annual average with percentage of valid measurements ≥ 14 % in µg/m³(3)  
 Annual mean lead 2012, based on annual average with percentage of valid measurements ≥ 14 % in µg/m³(4)  
 Annual mean benzo(a)pyrene 2012, based on annual average with percentage of valid measurements ≥ 14 % in µg/m³(5)  
 93.2 percentile of ozone concentration in 2012, based on daily running 8h max with percentage of valid measurements ≥ 75 % in µg/m³(6)  
 Annual mean ozone 2012, based on daily running 8h max with percentage of valid measurements ≥ 75 % in µg/m³(7)  
 Annual mean benzene 2012, based on annual average with percentage of valid measurements ≥ 50 % in µg/m³(8)  
 Annual mean carbon monoxide 2012, based on daily running 8h max with percentage of valid measurements ≥ 75 % in µg/m³(9)  
 Annual mean particulate matter < 2.5 µm (aerosol) 2012, based on daily average with percentage of valid measurements ≥ 75 % in µg/m³(10)  
 90.4 percentile of particulate matter < 10 µm (aerosol) concentration in 2012, based on daily average with percentage of valid measurements ≥ 75 % in µg/m³(11)  
 Annual mean particulate matter < 10 µm (aerosol) 2012, based on daily average with percentage of valid measurements ≥ 75 % in µg/m³(12)  
 Annual mean sulphur dioxide 2012, based on daily average with percentage of valid measurements ≥ 75 % in µg/m³(13)  
 
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