WHO
safe level
2x
4x
6x
8x safe level
10
20
40
60
80 micrograms
Annual mean concentration of PM2.5*
per cubic metre air in urban areas
Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)
Delhi
Kanpur
Kampala
Bamenda, Cameroon, recorded 132 micrograms in 2016. Kampala, Uganda, recorded 104
Baoding, China, recorded 93 micrograms in 2018
WHO
safe level
2x
4x
6x
8x safe level
10
20
40
60
80 micrograms
Annual mean concentration of PM2.5* per cubic metre air in urban areas
Delhi
Kanpur
Baoding, China, recorded 93 micrograms in 2018
Kampala,
Uganda
Lima, Peru, was South America’s most polluted capital city in 2018, recording PM2.5 at four times the WHO safe level
Bamenda,
Cameroon, recorded 132 micrograms in 2016. Kampala recorded 104
Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)
WHO
safe level
2x
4x
6x
8x safe level
10
20
40
60
80 micrograms
Annual mean concentration of PM2.5* per cubic metre air in urban areas
Delhi
Kanpur
Baoding, China, recorded 93 micrograms in 2018
Kampala
Lima, Peru, was South America’s most polluted capital city in 2018, recording PM2.5 at four times the WHO safe level
Bamenda, Cameroon, recorded 132 micrograms in 2016. Kampala, Uganda, recorded 104
Nine of the world’s 10 most polluted cities in 2018 are in India, including Kanpur (173 micrograms) and Delhi (143)