*Hyderabad:* As August begins, oil marketing companies have announced a revision in gas prices. Effective from today, the price of a 19 kg commercial LPG cylinder has increased by Rs. 8.50. The new prices are as follows:- Delhi: Rs. 1,652.50 (up from Rs. 1,646, an increase of Rs. 6.50)- Kolkata: Rs. 1,764.50 (up by Rs. 8.50)- Mumbai: Rs. 1,605- Chennai: Rs. 1,817These changes reflect slight variations in pricing depending on the region.In contrast, the prices for the 14.2 kg household gas cylinders remain unchanged. Non-subsidized household gas prices are:- Delhi: Rs. 803- Kolkata: Rs. 829- Mumbai: Rs. 818.50- Chennai: Rs. 802.50The oil marketing companies confirmed that these rates are effective from August 1 and will be maintained for the foreseeable future.