South Jersey Industries, Inc., through its subsidiaries, provides energy-related products and services. The company engages in the purchase, transmission, and sale of natural gas. It also sells natural gas and pipeline transportation capacity on a wholesale basis to residential, commercial, and industrial customers on the interstate pipeline system, as well as transports natural gas, which is purchased directly from producers or suppliers to their customers. As of December 31, 2017, the company had approximately 146.2 miles of mains in the transmission system and 6,645 miles of mains in the distribution system; and served 383,633 residential, commercial, and industrial customers in southern New Jersey. In addition, it markets natural gas storage, commodity, and transportation assets on a wholesale basis for energy marketers, electric and gas utilities, power plants, and natural gas producers in the mid-Atlantic, Appalachian, and southern regions of the United States. Further, the company develops, owns, and operates energy projects comprising natural gas fueled combined heating, cooling and power, and landfill gas-to-energy production facilities, as well as solar-generation sites. Additionally, it owns oil, gas, and mineral rights in the Marcellus Shale region of Pennsylvania; acquires and markets natural gas and electricity to retail end users, as well as provides total energy management services; and services residential and small commercial HVAC systems, and installs small commercial HVAC systems, as well as provides plumbing services and services appliances. South Jersey Industries, Inc. was founded in 1910 and is headquartered in Folsom, New Jersey.