Iron is one of the well water chemicals that can impact hair color by turning blonde hair to an orangish color. Besides turning hair a different color, it can cause other issues for your hair: Hair feels dry, brittle and crunchy. Hair is dull, lacks softness and shine.  Hair that is dark to begin with can darken even more. Hair that has been chemically treated (e.g., straightened, permed, or highlighted) can interact with iron in water.