What type of contaminant is Iron classified as?

Iron is classified as a secondary contaminant. Secondary contaminants are those that may cause aesthetic problems in drinking water, such as taste, odor, or color, but do not pose significant health risks at the levels typically found in drinking water. Iron can cause staining on laundry, plumbing fixtures, and can impart a metallic taste, which makes it a concern for water quality but not for safety. Monitoring and controlling secondary contaminants like iron is essential for maintaining the aesthetic quality of drinking water, even though they are not subject to health-based standards set by regulatory bodies.