The wastewater treatment plant is at the centre of the water contamination crisis in the area of Hammanskraal, where cholera has claimed the lives of at least 24 people.
Water and Sanitation Minister Senzo Mchunu said this was a marked difference from previous mayors in the capital city who refused to work with the national government in solving the problem.
President Cyril Ramaphosa said that government would now be embarking on a programme to reform the water sector, which has now come under the spotlight like the ongoing power crisis.