Fog reduces visibility across Delhi-NCR; air quality 'very poor'

Delhi on Wednesday woke up to a foggy morning, with reduced visibility as the air quality continued to remain in the 'very poor' category. According to the System of Air Quality and Weather Forecasting And Research (SAFAR), the air quality index (AQI) in Delhi on Wednesday stands at 339. An AQI between 0-50 is marked good, 51-100 is satisfactory, 101- 200 is moderate, 201- 300 is poor, 301-400 is very poor and 401-500 is considered severe. 

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