After a year of partial respite from rising air pollution during last year,the city has seen a sharp rise in the level of air pollutants this year.
Extensive public and private construction and other related activities have led to a a rise in the level air pollution,according to the Environment Status Report (2011-12) of the Brihanmumbai Municipal Corporation (BMC).
The report also shows that levels of toxic pollutants like sulphur dioxide (SO2),nitrogen dioxide (NO2) and suspended particulate matter (SPM) and ammonia (NH3) have increased drastically in all six BMC monitoring sites.
An alarming increase has been recorded in the levels of carcinogenic compound such as benzopyrene which can cause cancer and other respiratory and genetic disorders. While the Central Pollution Control Board (CPCB) standard for benzopyrene is 1 ng/m3,the BMCs Marawali monitoring centre at Chembur recorded a high level of benzopyrene at 1.2 ng/m3 and it was 0.9 ng/m3 in Bhandup.
Interestingly,the air pollution standards index (PSI) shows that pollution levels rise after the monsoon and peak in December.
Although there are various sources of pollution in the city including industrial,transport and domestic,the transport sector in the major contributor of air pollution in the city, said the report.
The car population in the city is growing annually by 5.6 per cent. The city has 20.35 lakh registered vehicles in 2012 compared with 18.70 lakh last year. With increasing number of two-wheelers,cars and jeeps,pollution levels at traffic junctions have also increased drastically. The air pollutants such as NO2 and carbon dioxide (CO2) have seen a drastic rise at air quality monitoring sites at Worli,Wadala and Andheri,says the report.
Sound pollution levels too have crossed permissible standards. The decibel levels in residential areas,commercial and even areas demarcated as silent zones are much higher than the Central Pollution Control Board (CPCB) standards. The noise levels have been increasing drastically over many years now. The increasing vehicle population and the resulting honking,construction activity and loudspeakers which used during festivals all contribute to noise pollution. We need an acknowledgement of the problem after which we can devise a plan of action, said Sumaira Abdulali,convenor,Awaaz Foundation.
Range of noise levels observed along with the prescribed standards (2011-12) Area Prevailing Noise levels in Mumbai Central Pollution Control Board Standard Decibel for the day Central Pollution Control Board Standard Decibel for the night.