If water tests indicate the presence of lead, and the source was determined to be beyond the household plumbing, again the first course of action is to identify and eliminate the source if possible. If served by a public water system, contact the water supplier and ask what steps can be taken to deal with the lead contamination. If the source of water is a private well, check both the well and the pump for potential lead sources. A licensed water well contractor may be able to help you determine if any of the well components are a source of lead. In addition to identifying potential lead sources, consider the corrosivity factor.
Electric current traveling through the ground wire accelerates the corrosion of lead in the pipes.
In this case, a qualified electrician should be consulted. If at all possible and if cost-effective, eliminate the source of lead in drinking water. There are several treatment methods suitable for removing lead from drinking water, including reverse osmosis, distillation and carbon filters specially designed to remove lead. Typically these methods are used to treat water at only one faucet. Reverse osmosis units can remove approximately 85 percent of the lead from water.