NW Natural Schedules Conference Call to Review Financial Results for Quarter & Year-to-Date Period Ending June 30, 2009

Northwest Natural Gas Company (NYSE:NWN), dba NW Natural, announced today that it will issue its second quarter and year-to-date earnings release on Tuesday, Aug. 4, 2009, for the three- and six-month period ending June 30, 2009.

NW Natural will conduct a conference call and webcast starting at 8 a.m. Pacific Time (11 a.m. Eastern Time) on Aug. 4, 2009, to review the company's financial and operating results.

To hear the conference call live, please dial 1-800-860-2442 within the United States, and 1-412-858-4600 from international locations, including Canada. To access the recording, please call 1-877-344-7529 and enter the conference identification pass code (431406#). To hear the replay from international locations, please dial 1-412-317-0088.

To hear the conference by webcast, log on to NW Natural's corporate website at www.nwnatural.com or through www.InvestorCalendar.com.

About NW Natural

NW Natural is headquartered in Portland, Ore., and serves more than 660,000 residential and business customers in Oregon and southwest Washington. It is the largest independent natural gas utility in the Pacific Northwest, and recognized its 150th year as a public company on Jan. 7, 2009. The company has approximately $2.0 billion in total assets, which includes about 16 Bcf of underground gas storage capacity within its service territory at Mist, Ore.