 In May 2007, SWC became a subsidiary of the British firm Cascal N.V. and in October 2012 it became part of the Sembcorp group from Singapore.In 1999 the municipality of Nelspruit in Mpumalanga (ex-East Transvaal) signed a 30-year concession with the Greater Nelspruit Utility Company (GNUC), a subsidiary of Cascal, itself part of the British firm Biwater.The concession serves 350,000 people in Nelspruit and neighboring townships.