APS to Communicate Outages Via Twitter
Customers Still Should Call Regarding Individual Accounts

June 3, 2010

Beginning this summer, APS customers, news media and other audiences will be able to follow the status of large-scale power outages through Twitter.

Twitter is a social networking and "microblogging" service that enables its users to send and read messages known as tweets. Tweets are text-based posts of up to 140 characters displayed on the author's profile page and delivered to the author's subscribers who are known as followers.

APS has established @APSOutageCenter as its Twitter page for this initiative. APS will utilize Twitter to communicate the evolving status of large customer outages caused by monsoon storms and other unforeseen events. Such information as number of customers impacted, general geographic descriptions of outage boundaries and safety reminders will be the subject of APS tweets. Once the resolution of an outage appears imminent, APS will sign off its Twitter page until circumstances warrant otherwise.

"In the event of a major power outage our customers are looking for the best information in the quickest manner possible," said Tammy McLeod, APS Vice President and Chief Customer Officer. "Twitter will provide yet another tool for our customers and other audiences to receive information from us. We encourage people to start following @APSOutageCenter today."

While Twitter will be used to communicate general outage information, customers who have specific questions or need to report an outage still should call the APS Customer Care Center at (602) 371-7171 or (800) 253-9405 outside the metro Phoenix area.

APS, Arizona's largest and longest-serving electric utility, serves more than 1.1 million customers in 11 of the state's 15 counties. With headquarters in Phoenix, APS is the largest subsidiary of Pinnacle West Capital Corporation (NYSE:PNW).

Damon Gross
(602) 250-2269