Well water filters remove elements, such as iron, manganese and hydrogen sulfide, that commonly build up in private wells and also stop the corrosion of copper pipes. There are also models that can balance pH or remove sediment in addition to this.
According to the EPA, approximately 15% of Americans get their water from private drinking supplies, such as wells. It is important for owners of private wells to test their water regularly (at least once a year) and perform proper water treatment. Avoiding storing or mixing any kind of hazardous chemicals near a well.