One of the reasons many parents don't want to take their children to a public pool is because of fear of the pee in the water due to the large number of children in the pool. But if you are certain that the pool quality is maintained, you have nothing to worry about.
The article written by Lee Rannals for redOrbit.com – Your Universe Online supports that scientifically, there is no proof that pee is harmful to the pool water. I agree, I guess, as long as everyone doesn't pee at the same time...
"Scientists confirmed a claim made by Michael Phelps back at the 2012 Olympics in London that peeing in the pool was just fine."
"Phelps caused reason for concern by admitting during the Olympics that many swimmers pee in the pool, but said that it was okay because the chlorine killed any germs.
Stuart Jones, a biochemist with Sense About Science (SAS), a charity that aims to dispel commonly held myths, said that he was in fact correct.
“In fact Michael, urine is essentially sterile so there isn’t actually anything to kill in the first place,” Jones said in a statement. “Urine is largely just salts and water with moderate amounts of protein and DNA breakdown products.”
He mentioned that chlorine is just preventing the bacteria from growing inside the pool water.
“So you’re basically right, peeing in a swimming pool, even if all swimmers do it simultaneously, has very little impact on the composition of the pool water itself,” he said.
According to Jones, an Olympic pool contains over 2 million liters of water, and a single urination is in the range of 0.2 liters.
“To have any significant effect on the overall composition of the pool water you’d need a serious amount of peeing,” Jones added."
I am still not going to let my own grandchildren PEE in the pool, though!