Water distribution systems supply drinking-water to consumers` taps. Internal corrosion of metallic pipe used in drinking-water distribution systems has reduced water quality by increasing its levels of toxic heavy metals, such as lead, copper, and nickel. These problems have been experienced to varying degrees by water utilities in many countries. North America has successfully controlled pipe corrosion and polluted water in water distribution systems by means of various policies, regulations, and rules. Practical and engineering guidelines for evaluating pipe corrosion and deciding on treatment options are also provided to improve drinking-water supplies. In addition, research on the corrosion mechanism in water distribution systems, such as the complex effects of physical and chemical parameters on the corrosion of pipes, has been used to more accurately predict the corrosion rates of metallic pipes in actual water distribution systems. This paper reviews various regulations, policy statement, and treatment procedures concerned with controlling corrosion in drinking-water distribution systems in the US and Canada and offers suggestions for management of polluted water and pipe corrosion in drinking-water distribution system in Korea.