I'm using ground water to provide my daily needs: Laundry, bath, toilet, ... I don't use it as drinking water, but I do cook with it.
What I noticed is that when using the water cold it appears as water from a bottle, but when I start to heat the water it turn orange as if the iron becomes more visible? It also is visible from water coming out of the boiler.
Does iron in water become visible when the water is being heated?
Another fun fact, just for information, when it rains a lot the orange color is more dense.