So what is the contribution of vehicular emissions to the air pollution in city? Quite high, if one has to go by a recent study which says that there are 36.3% diesel vehicles and 12.6 % petrol vehicles which exceed the national limit on vehicular emissions. The study has also found that the diesel & petrol vehicles which are having more than 15 year old are emitting more pollution.
The study titled "Joint monitoring of vehicular emission in Bangalore city", has been done by the Karnataka State Pollution Control Board (KSPCB) along with Transport & Road Safety Department, Traffic Police, BMTC and Zonal Office of Central Pollution Control Board (CPCB). The study was conducted during the month of June and July this year to understand the impact of vehicular emission on the ambient air quality of city.
1978 vehicles were checked for emission levels, out of which 1279 were petrol vehicles and 524 were diesel vehicle. The sample monitored data revealed that among 1279 number of petrol driven vehicles tested, out of which 1118 vehicles (87.5 %) are within the national limit and 161 vehicles (12.6 %) are exceeded the national limit.
Among 524 number of diesel driven vehicles tested, 334 vehicles (63.7 %) are within the national limit and 190 vehicles (36.3 %) exceeded the national limit.
As per the annual average data of air pollutants being monitored by KSPCB, particulate matter values have exceeded national limit 60.0 micro grams per metre cube in all 12 monitoring locations in the range of 20 % to 215 %.
