India, Nov. 3 -- The national capital recorded its worst air quality in 287 days, with the Air Quality Index (AQI) settling at 348 and 10 monitoring stations reporting severe pollution levels on Tuesday. Delhi last recorded a higher AQI on January 20 this year, when the index stood at 378.

Of the 57 air quality monitoring stations in the city, 10 recorded severe air quality, 35 were in the very poor category, and 12 reported poor air quality. Jahangirpuri recorded the worst air quality, with an AQI of 462, falling in the severe category.

According to the Central Pollution Control Board (CPCB), an AQI between zero and 50 is classified as good, 51 and 100 as satisfactory, 101 and 200 as moderate, 201 and 300 as poor, 301 and 400 as very p...