Updated: December 2018
Arizona is served by three primary investor-owned utilities: Arizona Public Service Company (APS), Tucson Electric Power Company (TEP), and UNS Electric. In 2017, APS was the largest electric utility with more than 1.2 million customers in 11 of the 15 counties in the state. TEP served over 420,000 customers in southern Arizona. UNS reported more than 96,000 residential and business customers mostly in Mohave and Santa Cruz counties.
In addition, Salt River Project (SRP) is a private, self-governed corporation serving more than 1 million customers in metro Phoenix and nearby areas.
Thirteen electric cooperatives also serve customers in Arizona.
Natural gas is provided by Southwest Gas and UniSource Energy Services. In 2017, these companies provided natural gas service to more than 1.2 million customers.
Electricity Demand-Side Management by Electric Utility
- Arizona Public Service Company (APS)
- Tucson Electric Power Company (TEP)
- Salt River Project (SRP)
- UNS Electric
- Trico Electric Cooperative
- Navopache Electric Cooperative
- Sulphur Springs Valley Electric Cooperative
Natural Gas Demand-Side Management