What's the best river to swim in Mauritius?

It is not advised to go for dips in rivers, because of the topography of the island, the rivers flow quite fast and it can get dangerous at any time, a 14 year old boy just drowned in a river but even if you are used to swimming in rivers, always be on your guard, go for shallow water...

Grand River South West (GRSW) - nice cool water, beautiful waterfall, clean water. If you stick to the shores, the water is shallow. Be careful of the current though...