Respirable suspended particulates
WHO guidelines - 50 μg/m3
24-hour avg
Fine suspended particulates
WHO guidelines - 25 μg/m3
24-hour avg
Nitrogen dioxide
WHO guidelines - 200 μg/m3
1-hour avg
Ozone
WHO guidelines - 100 μg/m3
8-hour avg
Sulphur dioxide
WHO guidelines - 20 μg/m3
24-hour avg
Carbon monoxide
WHO guidelines - 10000 μg/m3
8-hour avg
μg/m3