Polluants

Moroccan limit values

EU limit values 2010

WHO guideline values 

Sulphur dioxide (SO2)

99.2 percentile of daily mean values of 125 µg/m3

350 µg/m3 1-hour mean

20 µg/m3 24-hour mean

500 µg/m3 10-minute mean 

Nitrogen dioxide (NO2)

98 percentile of daily mean values of 200 µg/m3

50 µg/m3 annual mean

40 µg/m3 annual mean

200 µg/m3 1-hour mean

40 µg/m3 annual mean

200 µg/m3 1-hour mean

Carbon monoxide (CO)

10 µg/m3 daily maximum running 8-hour mean

10 mg/m3 maximum daily 8 hour mean

10 mg/m3 maximum daily 8 hour mean 

Particulate matter (PM10)

90.4 percentile of daily mean values of 50

50 µg/m3 24-hours mean

40 µg/m3 annual mean

50 µg/m3 24-hours mean

20 µg/m3 annual mean 

Ozone (O3)          
110 µg/m3 8-hour daily max mean          
120 µg/m3 8-hour daily max mean          
100 µg/m3 8-hour daily max mean