Lead contamination poses a serious threat to the safety of drinking water in many parts of the United States.

This colorless, odorless and tasteless metal can go virtually undetected in water. At the same time, excessive amounts of lead place adults at higher risk for cancer, stroke and high blood pressure; children are at an even greater risk since their growing bodies can absorb lead more quickly and efficiently than adults.

Reverse osmosis units, activated alumina filters and distallation units are commonly used to effectively reduce lead in water at the point-of-use.

Granular activated carbon (GAC) filters can also remove lead from drinking water. However, they are most efficient at removing lead when the water pH is near 7.

Small, countertop units can be efficient and popular treatment methods for residential customers. However, it is best to make sure the product your dealership offers contains an NSF seal, ensuring that the unit has been tested for adequate lead removal efficiency.

Dealers should remember, however, that the NSF seal does not guarantee that the filter will be effective after many months of continuous use.

Water treatment dealers should advise their customers using this treatment method that carbon filter replacement is always required periodically.

Prepared by Bryan R. Swistock, research support assistant and William E. Sharpe, Professor of Forest Hydrology, School of Forest Resources and Environmental Resources Research Institute at Pennsylvania State University, State College, PA.