HELENA – NorthWestern electric customers will be paying more to stay warm this winter. The Montana PSC said Tuesday, that the average residential customer’s bill will increase by about $11 a month for electric and about 50 cents per month for natural gas, under the interim rate hikes approved by the PSC, which is about $3 less than what NorthWestern Energy proposed for electric and about a dollar less than what the company proposed as an increase for natural gas service. The rate hikes are set to increase starting Saturday.
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