(CENTRALIA, WA) -- Puget Sound Energy natural gas customers will be paying less starting this month. The Washington Utilities and Transportation Commission approved a 15-percent decrease in natural gas rates for PSE customers in several Washington counties, including parts of Thurston and Lewis counties. According to the UTC, the average PSE bill for someone using 68 therms per month will drop by $12.54 to an average of $68.61 a month. The rate decrease, which went into effect on November 1, is due to a drop in the wholesale cost of natural gas.