Category
Group
Subgroup
NameYears of accessibilityData accessibility levelDescription
 sulphur dioxide 2002-2005NTS-2-
 nitrogen oxides 2002-2005NTS-2-
 carbon monoxide 2002-2005NTS-2-
 non-methane volatile organic compounds 2002-2005NTS-2-
 ammonia 2002-2005NTS-2-
 particulates 2002-2005NTS-2-