I pay around 8 cents kwh. I have been runniing a 1/2 hp submersible well pump laid in a well screen in the bottom of a sand bottom creek and pumping it up about 70 ft. Gets me rigt at 10gpm. I have only seen about 35 to 40 dollar a month increase in usage. I have been doing this for a bout 2 months and was very surprised to see what just 10gpm will do to fill a pond. Its about a 1 acre pond. When I started it was a little under 1/2 acre surface area now im almost full 1 acre surface area. I figure with no rain it still should be filled by early March. Not bad for 40 bucks a month. thinking about putting a well in this summer so I dont have to mess with the creek when it floods after hard rains.