Question

What is water called when it has a high concentration of iron, magnesium, or

calcium?
hard
a lake
groundwater
soft

Answer 1

I think Hard

Step-by-step explanation:

Hard water, water that contains salts of calcium and magnesium principally as bicarbonates, chlorides, and sulfates. Ferrous iron may also be present; oxidized to the ferric form, it appears as a reddish brown stain on washed fabrics and enameled surfaces.