Questar Announces 2011 First-Quarter Earnings Teleconference and Webcast

Questar Corp. (NYSE:STR) will host a teleconference and Webcast to
discuss first-quarter 2011 results beginning at 9:30 a.m. EDT (7:30 a.m.
MDT) on Wednesday, April 27, 2011. Ron W. Jibson, Questar president and
CEO, and Kevin W. Hadlock, executive vice president and CFO, will
comment on Questar′s first-quarter performance. Questar plans to issue
its 2011 earnings release Tuesday, April 26, 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 April 27 to April 30, by
calling (800) 642-1687 domestically or (706) 645-9291 internationally,
then pressing 32876540.

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 Corp.

Kevin W. Hadlock, 801-324-5407

Chad Jones,
801-324-5495 (Media)