(1)What is the capacity of the water purification plant in Koppies, Free State;
(2) whether there are any plans to upgrade the specified plant in the near future; if not, why not; if so, what are the relevant details;
(3) what are the full details of the quality of the water that was tested from the specified plant in the period 1 January 2014 to 31 October 2015;
(4) how will her department assist in preventing sludge from flowing into the Renoster River?