Location

Ozone level

(ppb)

NO₂ levels

(ppb)

Region

Suggested pollution source

Reference

Nairobi, Kenya

0 - 125.8

11- 976

urban

traffic related

[44]

Cairo, Egypt

29.69 - 64.0

50 - 140

urban

city emission

[20]

South Africa Zambia

Zimbabwe

19.7 - 61.9

-

rural

-

[45]

Mpumalanga Highveld, South Africa and Botswana

20 - 90

-

rural/industrial area

industrial/biogenic

[46]

Zimbabwe

33 - 48

-

rural

biomass burning

[42]

Central Africa

30 - 40

-

biomass burning

[41]

Port Harcourt, Nigeria

30 - 40

-

urban

city emission

[43]

Dar es Salaam, Tanzania

0 - 44

17 - 123

urban, sub-urban

city emission

This study