Pollution | VOL.13, ISSUE 78, May-June 2013
The ten topmost cities of India with unbelievable levels of air pollution have been laid bare by the ‘Urban outdoor air pollution database’, September 2011, by the Department of Public Health and Environment, World Health Organization. Although the causes of high levels of annual mean particulate matter (PM) with diameter of 10 µg/m3 or less are varied, here are the cities that have achieved the dubious distinction of being the top ten polluted cities in India. On the global scale the highest world record lies with Ahwaz in Iran with 372 µg/m3 and lowest falls in Santa Fe and Clearlake in the US, Whitehorse in Canada with 6 PM10. India ranks the 13th most polluted country out of the 91 studied with an annual mean of 109 µg/m3.