As part of AltaGas’ diverse energy portfolio, the Company owns and operates utility assets that store and deliver clean energy solutions to over 575,000 customers1 in Alberta, British Columbia, Nova Scotia, Michigan and Alaska. AltaGas also owns a one-third equity interest in Inuvik Gas Ltd. that delivers natural gas to customers in Inuvik, Northwest Territories and a 65 per cent interest in Cook Inlet Natural Gas Storage Alaska LLC in Alaska.


ENSTAR Natural Gas Company is a regulated public utility that delivers natural gas to approximately 143,000 residential, commercial, and industrial customers in and around the Anchorage and Cook Inlet area. 


Headquartered in Port Huron, Michigan, SEMCO is a regulated public utility that delivers natural gas to approximately 300,000 residential, commercial, and industrial customers in service territories in the southern half of the state's Lower Peninsula.


AUI is a public utility distributing natural gas to over 78,000 residential, rural and commercial customers in over 90 communities across Alberta.

Heritage Gas

Based in Nova Scotia, Heritage Gas provides a fully regulated natural gas distribution services to its customers.


With offices in Fort St. John and Dawson Creek, PNG operates natural gas transmission and distribution systems that serve approximately 41,000 residential, commercial and industrial customers in northern B.C. The company has been providing customers with safe and reliable service since 1968.

1 Including transportation and non-regulated business lines.

Safety Awards

Safety is a top priority and one of AltaGas’ first values. Our utilities demonstrate this strong commitment to safety and have received numerous awards because of their dedication to safe work initiatives.

Heritage Gas and AltaGas Utilities received the Canadian Gas Association Corporate Safety Award for Vehicle Safety in 2017.

ENSTAR received the American Gas Association Safety Achievement Award in 2014 and 2016.