The corresponding figures for Siri Fort are: 51 and 291 in 2012; 78 and 181 in 2013; 84 and 209 in 2014; 94 and 189 in 2015 and 102 and 320 in 2016.
As a whole, Delhi recorded an average PM 10 volume of 260 last year, over four times above the safe level, while the same was 65 in case of gaseous pollutant NO2 (Nitrogen dioxide). Its annual standard is 40.
“The particulate matter concentration was high during November 2016 – January 2017 because of prevailing meteorological conditions like calm weather, low temperature, very low wind speed and reduced mixing height, thereby preventing dispersion of pollutants and leading to their accumulation,” the minister added in his reply.
