Economy Delhi’s air pollution levels have peaked. Here is how severe air pollution harms you Updated : December 26, 2018 06:30 AM IST In some parts of Delhi, pollution levels hit 654 on Monday, among the worst recorded this year, and visibility in some parts of the city was just 200 metres, the weather department said. Anything above 100 is considered unhealthy. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.