We're more than a utility

UniSource Energy Services provides safe, reliable energy to almost 269,000 customers across Arizona. Our natural gas service reaches more than 167,000 customers in northern and southern Arizona, while our electric service reaches more than 101,000 customers in Mohave and Santa Cruz counties.

Company overview

UniSource and its sister company, Tucson Electric Power, are among a family of utilities owned by Fortis, Canada’s largest investor-owned gas and electric utility holding company. Fortis completed an acquisition of UniSource Energy Corporation, TEP’s and UniSource’s parent company, in August 2014.

Natural gas service

UniSource provides natural gas service in Santa Cruz, Mohave, Yavapai, Coconino and Navajo counties.

Electric service

UniSource provides electric service in Mohave and Santa Cruz counties. Our service territory in Mohave County is located in the northwest corner of the state. It includes both Kingman, located in the high desert central portion of the county, and Lake Havasu City, situated in the low desert along the Colorado River. Our Santa Cruz County service territory serves customers in the south central portion of the state, approximately 60 miles south of Tucson adjacent to the U.S. border with Mexico. We provide service to most of the county, including Nogales - its largest city.

Our Vision and Values

At UniSource Energy Services, our vision is to be an exceptional energy provider that positively impacts the lives of our employees, customers and communities.

Our vision and strategic direction are tied together by a common thread: our values. Our values define how we work and who we are.

We work safely

We are committed to the safety and wellbeing of our employees, customers and communities. We relentlessly pursue a deep safety culture where employees thrive in an environment of trust, resilience, engagement and continuous improvement.

Our differences make us stronger

We value and respect our coworkers, our customers and the communities we serve. We are dedicated to making meaningful progress toward equity, access and opportunity for all. We champion an inclusive, diverse environment that celebrates our unique contributions, perspectives and experiences.

We do the right thing

We take responsibility for our actions, keep our commitments and earn trust through transparency. We act openly and honestly and hold ourselves to the highest level of integrity.

We achieve excellence together

We collaborate to overcome challenges and achieve the highest levels of operational, organizational and financial performance. We attract and develop the best people to produce positive results that are consistent with our values.

We learn continuously

We inspire innovation by promoting a learning culture where it is safe to try new things, ask for help, seek feedback, and grow from our failures. We execute with agility and embrace change as an opportunity for even greater success.

We drive sustainability

We work to protect and preserve our environment. We promote and support prosperity, growth and wellbeing in our communities. We work efficiently, use resources responsibly and partner with customers to care for our planet.

Our management team

Every day, UniSource's executive officers lead by example. Learn more about our company's leadership team.

Meet our management team


Fortis is the largest investor-owned electric and gas distribution utility in Canada. Its regulated utilities account for approximately 93 percent of its total assets and serve more than 3 million customers across Canada and in the United States and the Caribbean. Fortis owns non-regulated hydroelectric generation assets in Canada, Belize and Upstate New York. For more information, visit fortisinc.com.

UniSource Energy Services: Code of Ethics

Code of Ethics

This Code of Ethics contains the standards we have set for ourselves as we carry out our important work.