Compared to last year, this Deepavali turned out to be a little less noisy and pollution causing in the city.
According to the Andhra Pradesh Pollution Control Board (APPCB) data collated during the festive season in different parts of the city, there was a rise in almost all parameters of ambient air quality and also noise levels on the festival day, when maximum number of crackers was burst, as compared to a day before.
However, when a comparison is worked out with similar data recorded during last year's Deepavali festival day, a marginal decrease could be observed. If Deepavali 2009 had the noise levels standing at 90.29 decibels in commercial zone and 87.91 dB at residential zone, the same was 82.89 dB and 85.79 dB this time. The 24 hour monitoring of the city at different zones was carried out in three shifts and the data thus generated shows the concentrations of Respirable Suspended Particulate Matter (RSPM) and Total Suspended Particulate Matter (TSPM) too decreasing when compared to the previous year. Last Deepavali, the RSPM and TSPM were logged at 386 microgram per cubic metre and 553 microgram per cubic metre respectively while this festival day, they stood at 214 and 408.
However, when put alongside the data recorded a day before the festival, i.e., November 4, the concentrations of RSPM were found to have increased approximately by 329 per cent in residential and commercial areas.
The Sulphur dioxide (SO2) and Nitrogen oxides (NOx) concentrations though going up on the festival day, remained within prescribed standards.