“Delhi might have just experienced the wettest June in more than a decade, but even the heavy rains failed to wash away some of the city’s deadliest air pollutants.
Air Quality Index data between 2016 to June 2017, available with the Central Pollution Control Board, revealed that pollution levels in Delhi refused to drop even during the rainy season. Not even in the month of June 2017, when the city received one of the heaviest rains in the last decade.
“Delhi hasn’t witnessed a single day in the last 535 days, in which air quality could be termed ‘good’. The air quality in nearly 50% of the days had poor category air quality followed by very poor,” said D Saha head of the air laboratory in the Central Pollution Control Board.” Hindustan Times

Read it on Delhiair.org: Delhi air quality not ‘good” in over 500 days, not even when it rained