NorthWestern Energy customers could be paying less. The company has filed for a propane supply at a lower cost for about 600 Townsend customers, a spokeswoman said. If approved, the decrease for a typical residential customer will amount to a $15.68 savings per month in the summer, $9.04 in the winter, and customers would save about $4.10 per month in the spring. The rate for delivery and service remains unchanged.
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