You don't want to know what I do in a pool. Did you know that there are approximately 40 gallons of urine in a swimming pool, and if you can smell chlorine in a pool then it doesn't have enough in it. The smell is a reaction between chlorine and ahem piss!!
Olympic pools have around 660,430 gallons of water. So 40 galls is a minute percentage - unless of course you open your mouth in the wrong place at the wrong time.....