Iron can be simply be identify by its metallic taste (or it yellow or brown color but it can be colorless) and if iron is consumed too much it can have really bad effects on your body like liver, heart, and pancreases damage. It can get into water supplies by corrosion (which is cause by low PH levels) of iron or steel pipes or other components of pluming. With a free water test learn more about Iron and how you can treat it.