Lead

Because the most common causes of lead in water are pipes in old buildings or older municipal underground distribution systems, replacing those pipes is the best way to prevent lead in drinking water. This is very costly, however, and may not be possible. If the source of the lead cannot be corrected, then you need to get a water treatment system that is designed to remove lead from water. The options are Reverse Osmosis (RO) and UF filtration will remove lead from drinking water