India: Delhi's air turns 'severe' again
New Delhi, Jan 19 (PTI) Delhi's air quality turned severe again on Tuesday due to low wind speed and high moisture levels, India Meteorological Department officials said.
The city's 24-hour average air quality index (AQI) was 404 on Tuesday. It was 372 on Monday and 347 the previous day.
Before that, Delhi's air quality remained in the severe zone for three consecutive days.
An AQI between zero 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".
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