The city registered lesser noise, water and air pollution during this festive season as compared to last year Kali Puja and Diwali, claimed West Bengal Pollution Control Broad’s officials today. The average ‘ambient noise level’ at 12am on the night of Diwali and Kali Puja this year was around 65 decibel.

“Although the level was higher than the permissible limits, the figure was 5 decibel lesser than last year’s average number, despite Diwali and Kali Puja being celebrated on the same night,” informed Mr Kalyan Rudra, chairman of WBPCB. Another positive development, according to the chairman was that the level of PM 10 on the night of Kali Puja that had shot up to the 1700mic-G/m3 mark, remained at around 950.

“Although this is above the standard limit, we have been able to keep it down by 700mic- G/m3 roughly,” highlighted Mr Rudra. Additionally, following the monitoring of the water quality, the dissolved oxygen and the biochemical oxygen demand of the Ganga waters before and after the immersion has been found to remain within the permissible limits. “This has been possible due to the civic bodies’ efforts that immediately took out the wooden structure instantly. This prevented the materials from dissolving into the water,” pointed out Mr Rudra.

The PCB officials are now mulling over schemes to collect the details of the suppliers of the artisans including sound system suppliers and paint suppliers. With these details, PCB officials will make it a point that the sound systems include sound limitors and environment friendly colours are used in idol making.