I just came home from a lake for a week, I have a question about the shower water?

Question

Why did it taste and smell like coins, held in someones hands for hours?

Answer 1

If you don't even Take a shower for two weeks it would make it smell like that I think it will be out of your shower on how many times you take one that would keep it from smelling I hope this helps

Answer 2

The water sat in the pipes all week, and what are the pipes made of?  Copper!

Answer 3

I probably had a lot of minerals in it.

My guess would be iron.

It is not harmful just a bit annoying if you are not accustom to it.