PHOENIX – Commitment to the environment, public health and safety, and sustainability are hallmarks of Pinnacle West Capital Corporation (NYSE: PNW). The corporation’s commitment to and efforts regarding each area is detailed in its 2007 Corporate Responsibility Report, now available online.

“At Pinnacle West, we view sustainability as an overarching business strategy that provides a long-term perspective, and allows us to plan for a future that must be cleaner, faster and smarter,” said Ed Fox, Vice President and Chief Sustainability Officer APS. “The Corporate Responsibility Report is an important look into our company’s sustainability efforts and speaks to our commitment to a better tomorrow, a healthy environment and strong communities.”

This year’s Corporate Responsibility Report features:

• Details about the future Solana Generating Station – which upon completion will be the world’s largest solar plant;
• Information about the corporation’s programs to increase energy efficiency for its customers;
• Awards recognizing the company’s environmental and social performance including Innovest’s highest rating (AAA) and ranking in the top two of utilities in the United States, and inclusion in Corporate Knights’ Global 100 Most Sustainable Companies;
• Use of innovative technologies to meet the corporation’s future needs, including renewable energy, future fuels and smart meters.

The report covers environmental areas such as air, water, waste and compliance for Pinnacle West subsidiaries including APS, APS Energy Services and SunCor. In addition, the report focuses on the company’s efforts to address climate issues.

The report was prepared in accordance with guidelines set by CERES, a coalition of investors and public interest organizations, and to the extent possible, Global Reporting Initiatives (GRI) guidelines. These guidelines were established to develop globally applicable standards for sustainability reporting.

Based in Phoenix, Pinnacle West has consolidated assets of about $11 billion. Through its subsidiaries, the Company generates, sells and delivers electricity and sells energy-related products and services to retail and wholesale customers in the western United States. It also develops residential, commercial and industrial real estate projects.

Contacts

Media:
Jenna Henry, (602) 250-4403

Technical Expert: David Jallo, (602-3528

Analyst:
Rebecca Hickman, (602) 250-5668
Lisa Malagon, (602) 250-5671