As far as I know, every state is required, by federal statute, to have Public Utilities Commission (aka PUC).

Do a web search and check them out. Here a "mission statement" from Minnesota's PUC:   


Electricity

The Energy Unit reviews all matters relating to natural gas or electricity coming before the Commission. Cases investigated by the Unit fall into several broad categories: rate changes, energy resource planning and certification, service area matters, mergers and acquisitions, and formal complaints. The Unit has also been actively engaged in monitoring the structural changes occurring in these industries.

The primary duties of the Commission regarding the regulation of energy are as follows:

*        Setting rates and regulation of service quality for large electric and natural gas companies
*        Approving resource plans for large electric utilities, including consideration of environmental affects of energy use
*        Granting Certificates of Need for large energy facilities, including power plants and transmission lines
*        Establishing depreciation and accounting procedures for electric and natural gas utilities
*        Approving appropriate financial incentives for energy conservation
*        Serving as board of appeals for the Conservation Improvement Program
*        Setting appropriate incentive for gas purchasing programs
*        Encouragement and approval of co-generation and small power generation resources
*        Handling complaints related to stray voltage and currents in the earth; has included a large study by an independent board of scientific advisors
*        Approving mergers, acquisitions and transactions between affiliates
*        Approving securities issuances, stock purchases and other major financial transactions with rate impacts
*        Administering assigned service areas
*        Administering the Cold Weather Shut-off Rule
*        Mediating consumer complaints regarding energy utility services