Separately, through text messages, IGL informed its piped natural gas customers that rates have been reduced by Rs 0.90 per cubic metres in Delhi and by Rs 0.40 in towns of Uttar Pradesh.
Piped natural gas supplied to kitchens in both the places will now be Rs 30.10 per standard cubic metres, it said.
It also announced a new cashback scheme for CNG fuelling through IGL Smart Card during offpeak hours at IGL CNG Stations.
The price of CNG in Delhi continues to remain the lowest in the entire country.
"In order to promote CNG fuelling during night, a discount of Rs 1 per kg shall be offered by IGL on the selling prices of CNG for filling between 12 am to 6 am at select outlets in Delhi, Noida, Greater Noida and Ghaziabad from now," the statement said.
"Thus, the consumer price of CNG would be Rs 44.20 per kg in Delhi and Rs 50.35 per kg in Noida, Greater Noida and Ghaziabad during 12 am to 6 am at the select CNG stations."
In addition, with a view to promote cashless transactions and push CNG refuelling during off-peak hours, IGL has introduced a special cashback scheme of Rs 0.50 per kg for CNG fuelling done only at IGL CNG stations through IGL Smart Cards between 11 am to 4 pm and 12 am to 6 am.
"The revision in retail price of CNG has been effected after taking into account the overall impact on the cost as a result of the reduction in prices of domestically produced natural gas notified by the government," the statement said.
With the revised price, CNG would offer over 56 per cent savings towards the running cost when compared to petrol-driven vehicles at the current level of prices. When compared to diesel driven vehicles, the economics in favour of CNG at revised price would be over 33 per cent, it added.