The use of copper tubes for drinking water application dates back to the late 19th century. Due to its corrosion resistance nature and ease of manufacturing and installation copper has displaced alternative materials for smaller pipe sizes that are competitively priced. To date copper accounts for almost 80 percent of all pipes installed in drinking water service in the industrialized countries. This accounts to well over 500 million linear feet of copper tubes installed each year in the United States alone. This paper discusses copper corrosion issues related to small and medium sized systems that use groundwater as the source.