New Delhi: The Capital breathed season's worst air on Sunday as the Air Quality Index (AQI) registered 381, which is equivalent to the "very poor" category. What is worse is that Diwali — the time when air quality is dips —  is still 10 days away.

Experts said that construction dust, vehicular pollution, and crop stubble burning from Punjab and Haryana adversely affected the air quality in the NCR, according to a report published by India Today.

Moreover, calm winds and low ventilation led to stagnation conditions.

The System of Air Quality Forecasting and Research (SAFAR) said that pollution is likely to increase and urged elderly people, children and heart and lung disease patients to avoid prolong and heavy exertion.

Meanwhile, Delhi chief minister Arvind Kejriwal blamed the Centre, and the governments of Haryana and Punjab on Monday for the severe air pollution in Delhi, alleging that they were not ready to do anything despite the all-out efforts by the Aam Aadmi Party government.

"The pollution was in control in Delhi throughout the year, but this time (winters) every year, Delhi has to face severe pollution condition due to the Centre, BJP-led Haryana and Congress-led Punjab governments.

"Despite our all-out efforts, they are not ready to do anything. Farmers of these two states are also fed up with their governments," Kejriwal tweeted.

On Sunday, Prime Minister Narendra Modi hailed farmers from Punjab, who do not burn stubble in fields.

With inputs from PTI