Industrial pollution, weathering of copper or lead bearing rocks, domestic wastewater, agricultural fungicides, fertilizers, certain aquatic plant control chemicals, etc, are major sources of copper and lead in surface and ground waters. There are several actions which can be taken to reduce the amounts of lead and copper in drinking water. This usually takes about 15 seconds to several minutes, depending on the size of the plumbing system. The longer water is sitting in pipes and the higher its temperature, the more lead and copper it may contain. This should only be considered as a temporary remedy.
Hot water tends to contain higher levels of lead and copper.
Use only water from the cold-water tap for drinking, cooking, etc. Have testing conducted by a competent lab. From an instructional laboratory and health standpoint, lead and copper in water can cause many problems. Be proactive and adopt the actions noted. It also would be a good idea to have home water tested.