May also be caused by corrosion of iron pipe. Water from the tap is red or yellow. There are red stains on fixtures or laundry. The water softener becomes plugged.
Water has a metallic flavor.
A red, slimy coating inside pipes and toilet tank. Test for mineral iron and iron bacteria to see if one or both are present. A mineral iron sample may be drawn from any tap that delivers untreated water from the well. The interior of the toilet tank is a good location for obtaining a sample. 1-Look for red residue below the waterline inside the toilet tank.