Tucson Electric Power Co. is asking its regulators to approve a rate increase, an expanded financial assistance program and annual rate adjustments.

Phoenix-based Arizona Public Service (APS) filed an application June 13 with the Arizona Corporation Commission (ACC) to update its rates to cover ongoing operations and to support the state’s growth ...

APS serves about 1.4 million homes and businesses in 11 of Arizona’s 15 counties and is a leader in delivering affordable, ...