According to the EPA, iron is classed as a nuisance contaminant. The substances that belong to this class of contaminants are considered non-health threatening. The amount of iron in the water has to be extremely high in order to pose any danger to health. It is very rare for this to happen. A water that is contaminated with iron is safe to drink or use for cooking. It is not surprising to that many people do not see the need to install a water filter for iron.
However, the presence of iron in the water can cause other problems. One problem is the corrosion of pipes. The presence of iron can lead to faster deterioration of metal pipes and other vessels. Some pipes contain dangerous metals like lead. The corrosion of the pipe releases these dangerous metals into the water. The damage to pipes caused by corrosion can also produce leaks in which other harmful contaminants can enter.
The corrosion of pipes also means that various water appliances are prone to breaking down which will then require expensive repairs.
Other effects of iron contamination involve the usability of the water. An iron-contaminated water can become unsuitable for many industrial applications. Using water that contains iron for washing laundry can discolor the fabrics. It is for these reasons that the use of iron filters must be carefully considered.