What causes rust in well water?

Rust in well water can come from iron or manganese deposits that mix with the air, also known as iron bacteria. The bacteria can grow into a slimy material that sticks to well pipes. This can cause the water to change color, have a strange taste or odor.

Although it is unknown if iron bacteria can cause disease, it can create a good environment for other harmful bacteria to grow. When repairing pumps, well pipes and well equipment, they should be disinfected properly. A laboratory can test the water if there is any indication that the well water is contaminated.