That includes swimming pools (with all due respect to (and laughter at) the recent Fowl Language comic http://www.fowllanguagecomics.com/comic/pool-with-the-kids/).
Originally shared by +Lifehacker:
Seriously, it's not like the beach is any better.
Yes, There Is Gross Stuff In Your Swimming Pool. Don’t Freak Out.
You’ve probably heard that it’s not chlorine that makes your eyes red when you swim, it’s the chlorine binding with other people’s pee. I look at it a different way: there will always be gross stuff in pools. That’s why we put chlorine in them. Your red eyes mean the chlorine is working.