What are the effects of high iron and or manganese in water?

• A. Staining of clothes and fixtures, promotion of iron bacteria. No negative health effects, no positive benefits to health
• B. Health benefits
• C. Improved taste and odor
• D. Increased disinfectant demand

Answer: (A)

High iron or manganese in water mainly causes aesthetic and operational problems rather than health benefits. The most noticeable effects are staining of fabrics, laundry, and fixtures with reddish-brown (iron) or dark/gray/black (manganese) residues, which can be difficult to remove and may discolor dishes. These metals can also encourage the growth of iron bacteria in the distribution system, leading to slime, taste and odor issues, and potential clogging of pipes or filters. Regarding health, there are no positive health benefits from drinking water with these metals; at typical drinking-water concentrations, they aren’t considered beneficial to health, though they can be undesirable for taste, odor, and appearance. While increased disinfectant demand can occur because iron and manganese deposits react with and consume disinfectants, the primary, most recognizable problems are staining and iron bacteria.