Arizona Public Service (or APS as it is often referred to as) is one of the electric companies that service Arizona. It is also the biggest, servicing many different corners of the state. the best thing about them is that their phone support is there 24 hours a day! I know that most of the other electric companies in the state are open during normal business hours only, which does not come in handy when you are experiencing an unplanned outage or some other problem on a 115 degree Saturday in Phoenix! It is your basic utility and I am never happy to receive their bills in the mail (especally during the summer!) but they do a good job and it is comforting to know that I can always get someone on the phone, 24 hours a day.