SOUTHERN UNION TO REPORT SECOND QUARTER 2010 EARNINGS AND HOST INVESTOR CALL/WEBCAST ON AUGUST 5TH

HOUSTON, July 16, 2010 — Southern Union Company (NYSE: SUG) will report earnings for the quarter ended June 30, 2010, before the market opens on Thursday, August 5, 2010. At 9:00 a.m. Eastern time that day, Southern Union will also host an investor call and webcast to discuss results and outlook.

To access the call, dial 866-543-6407 (international callers dial 617-213-8898) and enter passcode 90018846. A replay of the call will be available for one week after the event by dialing 888-286-8010 (international callers dial 617-801-6888) and entering passcode 71830228. The webcast may be accessed online through the Investor’s section of the company's web site at www.sug.com.

About Southern Union Company
Southern Union Company, headquartered in Houston, is one of the nation’s leading diversified natural gas companies, engaged primarily in the transportation, storage, gathering, processing and distribution of natural gas. The company owns and operates one of the nation’s largest natural gas pipeline systems with more than 20,000 miles of gathering and transportation pipelines and one of North America’s largest liquefied natural gas import terminals, along with serving more than half a million natural gas end-user customers in Missouri and Massachusetts. For further information, visit www.sug.com.

For further information:

John P. Barnett, Director of External Affairs
713-989-7556

John F. Walsh, Vice President of Investor Relations
212-659-3208