Delhi Chief Minister Arvind Kejriwal on Tuesday raised concerns about the deteriorating air quality as the overall Air Quality Index (AQI) settled at 404 micrograms per cubic on the National Ambient Air Quality Index (NAAQI).
“On November 9, AQI 404 (401 to 500 - Severe), PM10 - 414 (351 to 430 - Very Poor) PM2.5 - 265 (Above 250 - Severe),” CM Kejriwal tweeted.
According to the System of Air Quality and Weather Forecasting And Research (SAFAR), winds coming from the northwest at 925 millibars (mb) are favourable for the transport of stubble-related pollutants to Delhi.
In its short-range air quality weather forecast, SAFAR said, “Air quality improved from severe to very poor during the day.
Winds coming from the northwest direction at 925 mb are favourable for transport of stubble-related pollutants to Delhi. However, its impact on Delhi’s PM2.5 has reduced as wind speed has reduced.
Today’s share of crop residue burning is 30 per cent in PM2.5. AQI is likely to improve further but remain in very poor category,” it added.
Meanwhile values of suspended particulate matters (SPMs) on the NAAQI were abnormally higher than prescribed standards of the Indian Meteorological Department (IMD). SAFAR monitored PM 10 at 370 and PM 2.5 at 226.
SAFAR advised people to stay indoors and avoid prolonged or heavy exertion. “Stop outdoor activity at early morning and after sunset times. Go for a short walk instead of a jog and take more breaks. Stop any activity level if you experience any unusual coughing, chest discomfort, wheezing, breathing difficulty, or fatigue. If the room has windows, close them. If the air conditioner provides a fresh air intake option, keep that closed. Avoid burning of wood, candles or incense. Keep the room clean – don’t vacuum. Do wet mopping to reduce dust. Masks known as N-95 or P-100 respirators may only help if you go out,” it said.