Texas Gas Service Customers in El Paso Continue to Experience Low Natural Gas Prices

May 12, 2006

May 12, 2006, EL PASO, Texas – Texas Gas Service customers continue to see low natural gas prices. The May 2006 natural gas costs were $0.64558 per Ccf (hundred cubic feet), compared with $0.70068 per Ccf in May 2005.

"Our customers have the power to budget their dollars even further when they sign up for our average billing plan," says Richard Fleager, vice president of Texas Gas Service's western region.

Texas Gas Service created the ABC Plan to help its customers budget their natural gas payments throughout the year. The initial ABC payment is calculated by averaging the customer's gas bill over the previous twelve months; it is reviewed twice a year to make any adjustment upward or downward. The ABC plan makes billing predictable and easy on the customers' budget. For additional information customers can call (915) 562-8411.

Texas Gas Service does not profit from the cost of gas. Texas Gas Service charges its customers the same price it pays for natural gas, making the cost of gas a true "pass through" cost. TGS changes the cost of gas factor each month, to reflect current market conditions.

Texas Gas Service provides natural gas service to approximately 565,000 customers in the state of Texas, including customers in Austin, El Paso, the Gulf Coast and the Rio Grande Valley. Texas Gas Service is a division of ONEOK, Inc. (NYSE: OKE), a diversified energy company. ONEOK is the general partner and owns 45.7 percent of Northern Border Partners, L.P. (NYSE:NBP), one of the largest publicly traded limited partnerships, which is a leader in the gathering, processing, storage and transportation of natural gas in the U.S. and owns one of the nation's premier natural gas liquids (NGL) systems, connecting much of the natural gas and NGL supply in the mid-continent with key market centers. ONEOK is among the largest natural gas distributors in the United States, serving more than 2 million customers in Oklahoma, Kansas and Texas. Its energy services operation focuses primarily on marketing natural gas and related services throughout the U.S. ONEOK is a Fortune 500 company.

For information about ONEOK, Inc. visit the Web site: www.oneok.com.