A day after an overall “severe” Air Quality Index (AQI) at 435, the capital, at 221, saw a dip in AQI to “poor” category on Monday, stated data from Central Pollution Control Board (CPCB). The dip was due to evening showers on Sunday, followed by an increase in local wind speed, it added.
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The agency has forecast the spell of relatively clean air to continue for the next 48 hours. The AQI likely to touch “moderate” level in the next 24 hours, it added.
Kuldeep Srivastava, scientist, IMD, and head, Regional Weather Forecasting Centre, Delhi, said, the northern plains saw light to moderate showers on Sunday, with snowfall in the mountains. With withdrawal of western disturbance, wind speed is likely to remain good.
“On Sunday, wind speed touched 24 km/hr, and it was high on Monday too. A combination of rain and good wind speed has completely settled the pollutants and is allowing faster dispersal of local emissions,” he added.