A small increase in the wholesale cost of natural gas has prompted Puget Sound Energy to seek a 1.5 percent increase in the rates its charges its residential natural gas customers in Western Washington.
The company also is seeking a 1.6 percent increase for commercial customers.
The Bellevue-based utility filed for that increase Tuesday with the Washington Utilities and Transportation Board.
If granted, the utility said, the rate hike will increase the average residential natural gas bill to customers by $1.07 monthly to $78.55.
The rate increase would take effect Nov. 1. PSE said the rate increase would bring retail natural gas prices up to the level they were in 2010.
Puget Sound Energy is Washington state's oldest local energy company.
The utility serves 1.1 million electric customers and more than 760,000 natural gas customers in 10 counties.