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The relative humidity at 8.30 am was 91 per cent, according to the meteorological department.
Delhi’s air quality was recorded in the ‘poor’ category as the air quality index stood at 290 at 9.10 am.
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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