WPS: Sets Electric Use Record

Green Bay WI) – Hot and humid weather conditions on Monday afternoon (July 17, 2006) resulted in record use of electricity for customers of Wisconsin Public Service. At 2:00 PM, the company’s electric meter topped out at 2,425 megawatts. This surpasses the previous record by 68 megawatts, or 2,357 megawatts set last year on August 2, 2005. This also marks the first time in the company’s 123-year history of exceeding the 2,400 megawatt mark. Last summer, eleven peak records were set.

One megawatt of electricity is enough energy to power the needs of about 800 average homes.

Wisconsin Public Service Corporation, a wholly owned subsidiary of WPS Resources Corporation (NYSE: WPS), is an investor-owned electric and natural gas utility headquartered in Green Bay, Wisconsin. It serves approximately 420,000 electric customers and 309,000 retail natural gas customers in residential, agricultural, industrial, and commercial markets, as well as wholesale customers. The company’s service area includes northeastern and central Wisconsin, as well as an adjacent portion of Upper Michigan. Information is available online at www.wisconsinpublicservice.com.