The pollution level in the national capital on Sunday stood in the “very poor” category, and the overall Air Quality Index (AQI) was at ”305”, said the Centre-run System of Air Quality and Weather Forecasting And Research (SAFAR).
An AQI between 0-50 is marked good, 51-100 is satisfactory, 101-200 moderate, 201-300 poor, 301-400 very poor and 401-500 is considered severe.
According to the SAFAR: “Everyone should reduce heavy exertion. People with heart or lung disease, older adults, and children should avoid longer or heavy exertion.”