FAQs - Soil and water iron microbes in North Carolina
Are Iron blooms harmful?
No! They are a naturally occurring feature of the landscape, very different from acid mine drainage. However, they are used as an indicator to show where water from the ground discharges, and this water can be contaminated. Unless you know for certain otherwise, they thus should be treated with caution.
What causes them to form?
When water moves through the ground, it dissolves iron from our red soils and aquifers. When that water meets the air or surface water, it produces solids that similar to the rust that forms on cars or other iron objects.