The invention relates to a water purification system, a method of purifying water using the system and a method of manufacture of the water purification system. The invention particularly relates to awater purification system for packing small quantities of solid chlorine disinfectant which is stable for long period of time thereby ensuring that sufficient chlorine is available for killing of harmful micro-organisms in water to make it safe for human consumption.Accordingly, the invention provides awater purification system comprising a sachet containing granules of calcium hypochlorite.