Delhi’s air quality deteriorated to ‘severe’ due to a dust storm in northwest India which led to a sudden spike in the pollution level in the national capital, the Centre-run System of Air Quality and Weather Forecasting and Research (SAFAR), said.
The centre recorded the city’s air quality index (AQI) at 408 which falls in the severe category, while the Central Pollution Control Board showed the AQI in very poor category at 347. An AQI between 0 and 50 is considered ‘good’, 51 and 100 ‘satisfactory’, 101 and 200 ‘moderate’, 201 and 300 ‘poor’, 301 and 400 ‘very poor’, and 401 and 500 ‘severe’.
SAFAR also gave a list of precautions that should be taken under the ‘severe’ air quality condition, which includes avoiding all physical activity outdoors. 'Give a miss to walk today. Stop any activity level if you experience any unusual coughing, chest discomfort, wheezing, breathing difficulty or fatigue and consult doctor. If the room has windows, close them. If the air conditioner provides a fresh air intake option, close it,' the SAFAR said.