Air quality remaimed 'very poor' in Delhi on Tuesday, with average AQI being around 346 in morning and a toxic haze visible in most areas. Last year, AQI was around 359 on the morning after Diwali. AQI shot up to over 400 in Bawana, Wazirpur and Jahangirpuri, The Indian Express reported. Supreme Court had allowed green firecrackers on Diwali.