Which mineral in water supply is known to cause red water?

The presence of iron in a water supply is commonly associated with the occurrence of red water. Iron can oxidize when it comes into contact with oxygen in the air, which can lead to the formation of rust or iron oxides. These oxides are typically reddish-brown in color, and when they are suspended in water, they can give the water a distinct red or brown tint.

Moreover, iron is naturally occurring in various geological formations, and when water flows through or over these iron-rich materials, it can dissolve iron into the water, especially in the absence of adequate oxygen. This is particularly common in groundwater sources. When the water is later exposed to air or other conditions that promote oxidation, the dissolved iron precipitates out, resulting in visible discoloration in the water supply.

This phenomenon is significant as it can impact not only the aesthetic quality of the water—making it less appealing to consumers—but also lead to staining of fixtures and laundry. Therefore, understanding the role of iron in causing red water is essential for effective water treatment and management strategies to ensure the quality of drinking water.