AltaGas Second Quarter 2010 Results and Conference Call Advisory

July 20, 2010

CALGARY, ALBERTA--(Marketwire - July 20, 2010) - AltaGas Ltd. ("AltaGas") (TSX:ALA) will announce its second quarter financial results on Thursday, July 29, 2010. A conference call and webcast to discuss the results will be held the same day.

Time: 9:00 a.m. MT (11:00 a.m. ET)

Dial-in: 416-340-8018 or toll free at 1-866-223-7781


Shortly after the conclusion of the call, a replay will be available by dialling 416-695-5800 or 1-800-408-3053. The passcode is 4008001. The replay will expire at midnight (Eastern) on August 5, 2010. The webcast will be archived for one year.

AltaGas is one of Canada's largest and fastest growing energy infrastructure organizations. AltaGas creates value by acquiring, growing and optimizing gas and power infrastructure, including a focus on renewable energy sources. For more information visit:

This news release contains forward-looking statements. When used in this news release, the words "may", "would", "could", "will", "intend", "plan", "anticipate", "believe", "seek", "propose", "estimate", "expect", and similar expressions, as they relate to AltaGas or an affiliate of AltaGas, are intended to identify forward-looking statements. In particular, this news release contains forward-looking statements with respect to, among other things, business objectives, expected growth, results of operations, performance, business projects and opportunities and financial results. These statements involve known and unknown risks, uncertainties and other factors that may cause actual results or events to differ materially from those anticipated in such forward-looking statements. Such statements reflect AltaGas' current views with respect to future events based on certain material factors and assumptions and are subject to certain risks and uncertainties, including without limitation, changes in market, competition, governmental or regulatory developments, general economic conditions and other factors set out in AltaGas' public disclosure documents. Many factors could cause AltaGas' actual results, performance or achievements to vary from those described in this news release, including without limitation those listed above. These factors should not be construed as exhaustive. Should one or more of these risks or uncertainties materialize, or should assumptions underlying forward-looking statements prove incorrect, actual results may vary materially from those described in this news release as intended, planned, anticipated, believed, sought, proposed, estimated or expected, and such forward-looking statements included in, or incorporated by reference in this news release, should not be unduly relied upon. Such statements speak only as of the date of this news release. AltaGas does not intend, and does not assume any obligation, to update these forward-looking statements. The forward-looking statements contained in this news release are expressly qualified by this cautionary statement.

Investment Community
Myles Dougan
(403) 691-7594 or 877-691-7199
Adrianne Lovric
(403) 691-9873