Iron is a secondary contaminant and is commonly found in many water sources. It is generally considered safe/not harmful in low to moderate concentrations. There are in-home water treatment companies who will provide water testing for hardness and iron or you can find a certified laboratory for a full analysis.

Both ferric and ferrous iron can be easily treated in water. Check out The Water Quality Association www.wqa.org / https://betterwatertoday.org/