The invention corresponds to a composition for the treatment of polluted water and the method for the corresponding water treatment, wherein the composition comprises a flocculant, a stabilizer, an algaecide and further comprising chelator, disinfectant and oxygenator, wherein after diluting the composition in polluted water under certain stirring conditions, a water with properties of total hardness, total chlorine, total bromine, free chlorine, pH, alkalinity and cyanuric acid of a potable water is obtained.