New Delhi, June 21 (ANI): The Delhi Electricity Regulatory Commission has hinted that it will revise electricity tariff in the city, which is still grappling with unprecedented power outages. DERC said that the electricity tariff could be increased in the city due to increase in the coal prices, which in turn had increased the cost of electricity production. Due to persistent pressure by the power distribution companies on the power regulator to increase the tariff, the hike could affect people across all the slabs.