Northwest Natural Gas Company (NYSE:NWN), dba NW Natural, announced today that it will issue its third quarter earnings release on Friday, Nov. 4, 2011, for the three- and nine-month periods ending Sept. 30, 2011. NW Natural will conduct a conference call and webcast starting at 8 a.m. Pacific Time (11 a.m. Eastern Time) on Nov. 4 th to review the company's financial and operating results for the quarter and year-to-date periods. To hear the conference call live, please dial 1-877-317-6789 within the United States and in Canada please dial 1-866-605-3852. International callers can dial 1-412-317-6789. To access the conference replay, please call 1-877-344-7529 and enter the conference identification pass code (10005183). 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. About NW Natural NW Natural (NYSE:NWN) is headquartered in Portland, Ore., and provides safe, reliable, cost-effective natural gas service to about 676,000 residential, commercial, and industrial customers through 14,000 miles of mains and service lines in western Oregon and southwestern Washington. It is the largest independent natural gas utility in the Pacific Northwest. The company has approximately $2.5 billion in total assets. The company operates and owns 16 Bcf of underground storage capacity in Mist, Ore., and also operates the designed 20 Bcf Gill Ranch underground storage facility in California, in which it owns a 75 percent undivided interest. Together, NW Natural and its subsidiaries currently own and operate underground gas storage facilities with designed storage capacity of approximately 31 Bcf in Oregon and California. Additional information is available at the company's website at www.nwnatural.com.