Iron is not considered hazardous to health.
In fact, iron is essential for good health because it transports
oxygen in your blood. In the United States, most tap water probably
supplies less than 5 percent of the dietary requirement for iron.
Iron is considered
a secondary or "aesthetic" contaminant. The present recommended
limit for iron in water, 0.3 mg/I (ppm), is based on taste and appearance
rather than on any detrimental health effect.
When the level of iron in water exceeds the 0.3 mg/l
limit, there is a noticable red, brown, or yellow staining of laundry,
glassware, dishes. and household fixtures such as bathtubs and sinks.
may also have a metallic taste and an offensive odor. Water system
piping and fixtures can also become restricted or clogged.