Question: are sump pumps expensive to run?
Answer: The Cost of Operating a Water Powered Sump Pump. ... According to the EPA, the U.S. national average cost of water is $0.002 per gallon. So, multiplying 288 cycles, by 7.5 gallons per cycle, by a water cost of $0.002 per gallon, your cost to operate the pump would only be $4.32 during that 24 hour period.