Air quality index in the national capital improved slightly on Friday as New Delhi recorded an Air Quality Index (AQI) of 288 at 6 am. The city had recorded AQI levels of 373 only a day earlier, as per data from the Sameer app developed by the Central Pollution Control Board (CPCB).

The app showed monitoring stations at Anand Vihar reported an AQI of 305 and Bawana 363, both falling under the ‘very poor’ air quality category. AQI monitors at Burari Crossing (275) and Chandni Chowk (203) recorded ‘poor’ air quality.

The Air Quality Index (AQI) is a measure used to assess how polluted the air is and how it may affect health. It is calculated based on the concentration of key pollutants such as PM2.5, PM10, nitrogen dioxide (NO₂), sulfur dioxide (SO₂), carbon monoxide (CO), and ozone (O₃).

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