Swimming and Health Risks: A Closer Look ''We have been doing research on chemicals in water -- not swimming pools [specifically] -- for quite some time," Kogevinas says.

We’ve consulted several experienced pool professionals to help us navigate the main causes of cloudy swimming pool water. They also provide valuable advice on how to clear it.

Toxicologist Michael Dourson gives an overview of the chemicals found in swimming pools, hot tubs and spas and the risks they pose to humans.

Chlorine has long been an industry standard, but now a few companies are installing natural swimming ponds filled with biologically active goodies (but no mosquitoes or algae).

MORE INFORMATION: Blatchley has studied pool water treatment and chemistry for more than 20 years. His work has resulted in dozens of peer-reviewed published papers on pool water chemistry and he is ...

Does a Urine-Revealing Pool Chemical Exist? Kids have long been warned about a chemical in swimming pools that reveals the presence of urine.

Extreme heat raises questions for pool lovers. What temperature is too hot for a swimming pool? Is it safe to swim in 90 degree water? What to know.

This elegant pool, designed by Philippe Barriere Collective is filled with naturally-filtered, recycled water and built out of local rocks, gravel and stone.

But in the grand scheme of bad things that can happen to you in a swimming pool, how bad is this? Do you really need to worry about dangerous urine-induced chemicals when you take that next dive?