Delhi’s air quality showed a slight improvement on Saturday morning, with the AQI in the ‘poor’ category at 261, marking a drop from the 290 recorded a day before, Central Pollution Control Board (CPCB) data showed.

However, Anand Vihar was in the ‘severe’ category with an Air Quality Index (AQI) of 415, the highest among all the monitoring stations in the capital, according to the Sameer app developed by the CPCB.

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Seven stations recorded ‘very poor’ AQI, while the rest remained in the ‘poor’ category.

According to the CPCB, 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’.