The Department of Water and Sanitation (DWS) on Wednesday cautioned water users along the Vaal and Harts rivers in the North West and the Northern Cape of the presence of cholera. This followed a routine raw water sampling from five sites – Wentzel dam, Schweizer Reneke, Christiana, Barkley West caravan park and Douglas weir – in September, which indicated the presence of cholera, the DWS said in a statement issued to media.