According to the index, 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’.
The average 24-hour AQI at 4 pm on Wednesday was 328 in Ghaziabad, 322 in Noida, 337 in Greater Noida, 307 in Faridabad and 316 in Gurgaon, according to CPCB’s Sameer app.
On Tuesday, it was 356 in Ghaziabad, 335 in Noida, 375 in Greater Noida, 310 in Faridabad and 302 in Gurgaon.
On Monday, it was 369 in Ghaziabad, 368 in…