Secunda, modern company town (built after 1974), Mpumalanga province, South Africa. It is located about 80 miles (130 km) east of Johannesburg in a region of extensive coal reserves and adequate water supplies, at the site of South Africa’s second and third oil-from-coal extraction plants. Like the world’s first such plant at Sasolburg, the Secunda plants produce commercial quantities of oil. Built by Sasol Ltd. (called the South African Coal, Oil, and Gas Corporation Ltd. before 1979), the second plant achieved full production in 1982. The plants also produce a great variety of chemicals as well as gasoline; ancillary industries produce fertilizers, plastics, man-made fibres, and detergents.