Metals, such as copper and iron, can leach into water from the pipes and plumbing and impart a metallic taste in the water. Less common metals, such as manganese and zinc, can also be a problem. Usually this is not an immediate health threat and is more of a nuisance, especially since these metals can also leave stains in your household. Older, rusty city pipes or older residential pipes, particularly those made from iron, can be a common source of these metal contaminants. If your water source is a well, you may be dealing with iron caused by seepage or corrosion. However, this leaching of metals into the water can also be an indication that you have low pH water (acidic water). Problems with pH may be caused by acid rainfall, naturally low pH water, poor plumbing practices, improper electrical grounding, and more. A range of 6.5 – 8.5 pH is the normal range for tap water. If your water’s pH is low, a neutralizing filter or soda ash injection can be used to balance the pH of the water. 

The presence of copper in the water can also indicate the possible presence of lead. Click Here for more information on lead. A carbon drinking water filter or reverse osmosis system should eliminate the issue; however, make sure that the system that you choose is certified for lead removal by the WQA or NSF International, as not all systems are qualified for the reduction of lead.