The electric power system consists of 5 substations which step down the voltage from 69,000 volts to 12,470 volts. The current is then distributed through 18 feeder lines to neighborhood transformers to serve over 9,200 electric customers. The system has 217 miles of power lines of which 83% are underground with that percentage growing every year due to conversion projects. The peak demand city wide in 2010 was 58.5 MW down from a historical high of 60.9 MW in 2006.

The heating system was built in 1913. In 1982 it was modernized to utilize hot water, rather than steam, to provide heating. In making the upgrade to hot water, Willmar Municipal Utilities achieved higher efficiencies. As part of the 1982 renovation, Willmar Municipal Utilities rebuilt the entire district heating distribution system. The district heating program started serving only the commercial, institutional and industrial buildings in the core business district, but began expanding in 1983 and continued expanding until 1990 to include its current customer base – 96 commercial, institutional and industrial facilities and 140 single family homes. The most recent expansion was to the Rice Memorial Expansion Project in 2003.

The water system consists of 16 wells, 2 water treatment plants, 3 pumping stations, and 4 storage facilities. The water is then moved over 120 miles of distribution piping to serve over 6350 water customers. The Willmar Municipal Utilities has been recognized state-wide as an industrial leader in providing low cost, high quality water. An average of 4 million gallons of water per day are pumped to Willmar’s customers. The peak daily demand for water in 2012 was 6.5 million gallons. Willmar Municipal Utilities’ production capacity is 7.9 million gallons of water per day.