Hindustan Times. According to the Central Pollution Control Board (CPCB), the city’s AQI stood at 160 at 7 pm on Monday. At the same time on Tuesday, it was recorded at 141, indicating a marginal improvement,. Sector 22 recorded readings of 158 and 170, both falling in the moderate category. Moderate air can cause breathing discomfort to people with lung or heart diseases and those suffering from.