Environment Health & Air Pollution — Practice

The air pollution index chart of 4 consecutive days in Delhi station is given below. The air quality index of November 23 is classified as? Date O3 CO NO2 PM10 PM2.5 AQI Nov 21 0.428 38 344 470 334 350 Nov 22 0.422 34 338 462 328 340 Nov 23 0.520 48 402 512 394 407 Nov 24 0.434 37 348 476 344 356