 When looking at delivery rates or what you pay minus supply costs. What we found are extreme disparities in rate increases. Maryland People's Council David Lapp says looking at delivery rates for the electric companies owned by Exelon in the state, the rates have doubled. For Pepco, which services many people in the D.C. region, they've seen delivery rates go up from 2.6 cents a kilowatt hour to 6.2 cents. Very substantial increase.