Air Quality ‘Very Poor’ in Ghaziabad and Noida, ‘Poor’ in Gurgaon and ‘Moderate’ in Faridabad: CPCB

<p>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 pmon Monday was 329 in Ghaziabad, 310 in Noida, 319 in Greater Noida, 173 in Faridabad and 298 in Gurgaon, according to CPCB's Sameer app.</p>