Why is potassium permanganate used for purifying drinking water?

Potassium Permanganate is a purplish colored crystalline solid. It turns out, this chemical not just useful for making fires. Here are the 7 best uses for Potassium permanganate: (1)Purifying water (2) Creating an antiseptic solution (3) As an anti-fungal treatment for the hands and feet (4) As a cholera disinfectant (5) Treating canker sores (6) Marking snow as an emergency signal. (7) General disinfectant agent (b) The correct chronology of the rebellion in ascending order are Champaransatyagraha, 1917, Moplah Rebellion 1921, The Bardoli Satyagraha of 1928 and Salt Satyagraha 1930.