Questar Announces 2011 Second-Quarter Earnings Teleconference and Webcast

Questar Corp. (NYSE: STR) will host a teleconference and Webcast to
discuss second-quarter 2011 results beginning at 9:30 a.m. ET (7:30 a.m.
MT) on Thursday, July 28, 2011. Ronald W. Jibson, Questar president and
CEO, and Kevin W. Hadlock, executive vice president and CFO, will
comment on Questar′s second-quarter performance. Questar plans to issue
its 2011 earnings release Wednesday, July 27, 2011, after the market
closes.

Interested persons may listen to the Webcast online at the Questar Web
site, www.questar.com.
A podcast will also be available for download following the Webcast at www.questar.com.
A replay of the teleconference will be available on the Web site,
accessed by clicking on Investors>News, Events & Presentations>Calendar.
A telephone audio replay will be available from July 28 to July 31, by
calling (800) 642-1687 or (706) 645-9291 and then pressing 32876701.

Questar Corporation is a Rockies-based integrated natural gas company
with an enterprise value of about $4.3 billion. Its subsidiaries include:

• 
  Wexpro Company?which develops and produces natural gas on behalf of
  Questar Gas Company′s utility customers;
  
• 
  Questar Pipeline Company?which operates interstate natural gas
  pipelines and storage facilities in the western United States;
  
• 
  Questar Gas Company?a regulated natural gas distribution utility
  serving over 900,000 homes and businesses in Utah, Wyoming and Idaho.
  

Questar Corporation

Tony Ivins, 801-324-5218

Chad Jones,
801-324-5495