Is Chlorine bad for your hair?

I work in a biosecure environment where we have to take shower daily and sometimes twice a day with chlorinated water. I'm concerned about it because the color of my hair has slightly changed from black to slightly light brown (odd color) And also many people here have experienced significant hair loss over the years.

I want to ask how bad is it for hair and what kind of effect it has on our scalp. And is there any way to negate it's effects?