LEWISTOWN — Natural gas customers served by UGI Utilities Inc. will not see a change in supply rates beginning June 1, though a modest increase is projected later this year. UGI announced its purchased gas cost rates will remain the same for June, following its annual filing with the Pennsylvania Public Utility Commission. However, the company is projecting a rate increase effective Dec. 1, pending regulatory approval. If approved, a typical residential heating customer using 68.7 hundred cubic feet (ccf) of gas per month would see a bill increase from $118.53 to $120.99, or about ...