Delhi’s air remained in the severe category for the fourth day on Friday even as steady breeze slightly improved the pollution levels.
The three municipal corporations mounted a massive street watering drive including at dusty open grounds like Ramlila Maidan to ensure fugitive dust does not add to the dirty air.
There was a dip in the air quality level on Tuesday due to dust storms in the western India, particularly Rajasthan.
However, influx of dust slowed down and local winds in Delhi picked up, due to which the air quality is expected to return to very poor category from severe by Saturday, said Gufran Beig, a scientist at the System of Air Quality and Weather Forecasting and Research institute (SAFAR).
The PM10 level was recorded at 626 in Delhi-NCR and 650 in Delhi, leading to hazy conditions. The PM2.5 level was at 164 in Delhi and 162 in Delhi-NCR, the CPCB data said.