South Jersey Industries, Inc., through its subsidiaries, engages in the purchase, transmission, and sale of natural gas for residential, commercial, and industrial customers. It sells natural gas and pipeline transportation capacity on a wholesale basis to various customers on the interstate pipeline system, as well as transports natural gas purchased directly from producers or suppliers to their customers. The company also develops, owns, and operates energy-related projects, such as thermal facilities, combined heat and power facilities, landfill gas-fired electric production facilities, and solar projects that provide cooling, heating, and emergency power. In addition, it markets natural gas storage, commodity, and transportation assets on a wholesale basis for energy marketers, electric and gas utilities, and natural gas producers in the mid-Atlantic, Appalachian, and southern regions of the United States. Further, the company provides plumbing services and services appliances, and services for the acquisition and transportation of natural gas and electricity for retail end users; markets total energy management services; installs and services residential and light commercial HVAC systems; and offers services, such as information technology, human resources, government relations, corporate communications, materials purchasing, fleet management, and insurance, as well as owns oil, gas, and mineral rights in the Marcellus Shale region of Pennsylvania. As of December 31, 2011, it served 351,304 residential, commercial, and industrial customers in southern New Jersey. South Jersey Industries, Inc. was founded in 1910 and is headquartered in Folsom, New Jersey.