• APS is Arizona's largest and longest-serving utility, turning 122 years old in 2008. APS currently serves 1.1 million customers in 11 of Arizona's 15 counties.
   
• Established in 1886, the company is also the second-fastest growing utility in the country.
   
• APS was recently named the recipient of the 2008 Edison Electric Institute (EEI) Edison Award, the industry's highest honor, for developing a real-time monitoring tool of major transformers serving the company's customers.
   
• Over the last decade, APS has added more than 300,000 customers with minimal increases in staff.
   
• Ours is the 11th largest service territory in terms of square miles among the country's 55 investor-owned utilities.
   
• APS is regulated by the Arizona Corporation Commission (ACC) and the Federal Energy Regulatory Commission (FERC).
   
• With headquarters in Phoenix, APS is the largest subsidiary of Pinnacle West Capital Corporation (NYSE:PNW).
   
• As a company, APS has about 6,600 employees.
   
• To keep up with future customer growth while continuing to provide high quality, dependable electric service at affordable rates, APS must invest more than a billion dollars a year in electricity infrastructure, including power plants, transmission and distribution lines, substations and transformers.
   
• APS serves 224 customers for every employee, compared to 199 customers per employee in 2000. That is a more than 10 percent efficiency increase during a period when our peak load has grown by nearly 28 percent.
   
• APS has more than 32,000 miles of transmission, distribution lines and underground cable. We invested $400 million on transmission and distribution infrastructure. This includes building 10 distributions substations, upgrading 14 others and installing 52 distribution feeders - compared to an average of just two new substations per year from 1991 to 1998. APS' 2007 system peak was 7,545 megawatts. The company's record system peak of 7,652 occurred in 2006 on a 118-degree day.
   

APS Fuel Mix/Generation

APS operates 10 power plants that use a variety of sources to produce power. The company also has the second largest generation fleet in the Western United States.