Summary:
When the mixing layer goes up during the day, the AQI improves, but it increases once again at night when temperatures drop. NEW DELHI : The air quality in Delhi remained ‘severe’ for a third consecutive day with not much improvement in the last 24 hours, despite a host of emergency measures still in place to control the pollution. However, forecasts show that the impact of a western disturbance could lead to a drop in the pollution once again. These include a ban on construction activities and entry of trucks into Delhi till November 12. The average PM2.5 level, which was 269 micrograms per cubic metre, is forecast to drop to 225 micrograms on Monday, while the average PM10 level, which was 410 micrograms per cubic metre on Sunday, is also forecast to drop to around 340 micrograms, SAFAR’s forecast system showed..