I have my shower curtain liner soaking in a bucket of CLR [calcium, lime, rust] cleaner. The bottom of the white liner is brown from the shit in our NYC water.
My beige toilet has streaks that I cannot remove.
Until I put a filter before my reverse-osmosis filter that resides under the kitchen sink, the carbon canisters would completely clog every two weeks.
Iron in excess is a brain toxin. It is also toxic to my Rainbow Lorikeet who can easily die from an excessive build-up of iron in his blood.
I drink only filtered water, as do my birds and dogs.
So, I wonder what is in your water.