Northwest Natural Gas Company (NYSE:NWN), dba NW Natural, announced today that it will issue its second quarter earnings release and hold its quarterly conference call on Wednesday, August 4, 2010, for the period ending June 30, 2010. NW Natural will conduct a conference call and webcast starting at 8 a.m. Pacific Time (11 a.m. Eastern Time) on August 4th, to review the company's 2010 second quarter and year-to-date financial and operating results. To hear the conference call live, please dial 1-877-317-6789 within the United States, and 1-412-317-6789 from international locations. From Canada, please dial 1-866-605-3852. The pass code is 442257#. To access the replay recording, please call 1-877-344-7529 and enter the conference identification pass code (442257#). To hear the replay from all 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 approximately 668,000 residential and business customers in Oregon and southwest Washington. It is the largest independent natural gas utility in the Pacific Northwest. The company has approximately $2.4 billion in total assets, which includes about 16 Bcf of underground gas storage capacity within its service territory at Mist, Ore., is building an underground gas storage facility near Fresno, Calif., and has plans to develop a natural gas pipeline in Oregon.