New Delhi, December 30: The pollution in the national capital has once again deteriorated and has turned severe. The AQI was at 462 in Anand Vihar and at 494 in Okhla Phase-2, both falling in the 'severe' category. A thick layer of fog has enveloped the city, increasing humidity levels and slow winds together pushed Delhi’s air quality into the ‘severe’ category on Sunday, with the Air Quality Index (AQI) hovering around 431.

The temperature has dipped considerably. The minimum temperature in the national capital touched a low of 2.5-degree Celcius on December 29. As a result of the foggy weather conditions at the New Delhi railway station, 30 trains are running late due to low visibility in the Northern Railway region. Delhi Air Pollution: Air Quality Dips to 'Very Poor' Category, Situation Likely to Worsen Over Next Few Days.

 Check ANI tweet:

An AQI between 0-50 is considered "good", 51-100 "satisfactory", 101-200 "moderate", 201-300 "poor", 301-400 "very poor" and 401-500 "severe". An AQI above 500 falls in the "severe-plus" category.

(The above story first appeared on LatestLY on Dec 30, 2019 08:37 AM IST. For more news and updates on politics, world, sports, entertainment and lifestyle, log on to our website latestly.com).