NorthWestern Energy residential rates are expected to rise about $22.20 a year beginning in October as the utility attempts to recover unexpected costs from the previous rate year. This rate increase follows a July rate increase of $26.40 a year for an average residential customer. The 12-month rate increase requested August 31st would take hold October 1st. NorthWestern has a chance every fall to recover costs or return money to customers in the case that it over-collected.
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