When Johannesburg’s august Mayor, Harry Graumann (later Sir Harry), welcomed the Duke and Duchess of Connaught on 28 November 1910 he presented the Royal couple – who had come to South Africa to open the first Union Parliament – with a lavish commemorative book. This described the Town Engineer’s duties in terms of roads, parks, gas, electricity provision and other grand projects, but there was not a word about sewage, such were the Edwardian sensitivities to this delicate subject. Yet the disposal of human waste has determined the size and success of cities for millennia. Delta Park owes its existence to the expansion of Johannesburg’s sewage scheme during the 1930s when rural farmland on the outskirts of the city was transformed into the Delta Sewage Disposal Works.
Johannesburg is situated on the Witwatersrand watershed and rivers flow either to the south (into the Klip River, thence into the Vaal River, and eventually into the Atlantic Ocean) or to the north (feeding into the Crocodile River, the Limpopo River and disemboguing into the Indian Ocean). The city is somewhat unusual in always having separated waste-water (including sewage) from storm-water. Until a Town Engineer’s Department was established in 1902 after the South African War, sewage was collected in tarred buckets and removed beyond the town’s boundaries by horse-drawn night-soil carts to be used as fertilizer on neighbouring farms. Naturally, disease was a regular hazard.
Between 1902 and 1910 a very large gravity-fed sewage scheme (at...
