Air Quality Guidelines 2021 thresholds (WHO)
– PM2.5: 5 μg/m3 Annual average; 15 μg/m3 24-hour average
– PM10: 15 μg/m3 Annual average; 45 μg/m3 24-hour average
– O3: 60 μg/m3 Peak season average; 100 μg/m3 8-hour average
– NO2: 10 μg/m3 Annual average; 25 μg/m3 24-hour average
– SO2: 40 μg/m3 24-hour average
– CO: 4 mg/m3 24-hour average
Categories:
Air Quality
Entry Date:
29/10/2021
Source 1 Name:
WHO global air quality guidelines. Particulate matter (PM2.5 and PM10), ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide. Executive summary. Geneva: World Health Organization; 2021. Licence: CC BY-NC-SA 3.0 IGO.