I've noticed that the western side of town is all 25kV and the downtown area and the eastern side of town still run at 12.5kV. Centreville also has some goodies left from the 1950s. Centreville's substation is located off of US 301 just south of town. The substation is getting a voltage increase and Delmarva Power is currently building either a 230kV line or a 138kV line between the Centreville sub and the Wye Mills sub but I have not confirmed what votlage the line will be energized at. My new house is about 10 minutes east of Centreville and I'm powered by the 12.5kV system.