Sawnee Electric Membership Corporation announced Monday a change that should lower bills for most of its customers through the end of the year. The change, effective Sept. 1, should reduce monthly Sawnee EMC bills by $10.57 per 1,000 kilowatt-hour used, the company said in a news release. The rate reduction is expected to save Sawnee members approximately $9.9 million from September through the end of 2015, with those who use more electricity seeing larger savings.