It is flint with the water problems haha. What happens here, is people check there detroit tap water, without first checking the piping in thier houses. If your in a detroit area house, and have never updated your piping, its likely your house piping causing it to look bad.
Get your water tested, see what is in it, might be mostly calcium and magnesium , this would save you a small fortune in call mag. My city issues water reports 4 times a year so I don't have to test , but with your numbers you totally should. It might be high but it might be good