With rising pollution in the National Capital, the Delhi government might impose a complete ban on passenger buses except those running on CNG, electricity and BS-VI diesel from entering the capital city.

Delhi is under GRAP Stage IV restrictions amid deteriorating air quality in the national capital. At present, only trucks are barred from entering the city, as reported by PTI.

Although Diwali is over, but many other festivals are around the corner.

A source said, "Chhath Puja is around the corner and there is a huge rush being witnessed because of it. We are planning to implement a ban after the festival." Last month, the Delhi government directed that all buses entering the national capital from Haryana will have to be run on electricity, CNG or BS-VI diesel.

Buses entering from the NCR regions of Uttar Pradesh and Rajasthan also need to follow these norms.

The city government's transport department said all buses entering Delhi from any city or town in Haryana, Rajasthan and Uttar Pradesh from July 1 will only be those that run on electricity, CNG and BS-VI diesel.

"There are plans to implement the same norms for buses coming from all states," the source added.

Delhi's air quality dropped over the last few days despite the city government implementing stringent measures, including a ban on construction work and the entry of diesel- guzzling trucks into the city, to control pollution. Forty enforcement teams, including traffic, are deployed in Delhi's border areas from 8 pm to 4 am to enforce the restrictions. A hundred teams have been pressed into action overall to check overloaded trucks, pollution certificates, interstate buses and congestion