Another reason to be careful who you swim with. Or at least ask them if they pee in the pool. Diarrhea is also involved in this study.

The pool can be a scary and dangerous place for a lot of kids. It is now a scary and dangerous place for me too. The CDC celebrated Healthy and Safe Swimming Week last month and released new information about Americans habits involving the pool. And the results might disgust you. The CDC says that cryptosporidium, a disease that causes watery diarrhea, has been on the rise in America. The amount of crypto cases have doubled from 16 to 32 from 2014 to 2016.

For Healthy and Safe Swimming Week, the CDC is giving tips to swim. A recent survey showed that 1 in 4 people have gone swimming within an hour of having diarrhea. The CDC says that these Crypto outbreaks can be linked to swimming soon after having diarrhea, saying that chlorine doesn't easily kill germs and bacteria.

Crypto outbreaks linked to swimming are increasing and are particularly hard to control, because germs are not easily killed by chlorine. Crypto is seen in swimming pools and water playgrounds. Here's what the CDC had to say:

That’s why it’s so important not to swim or let your kids swim if sick with diarrhea. Just one diarrheal incident in the water can release millions of germs. If someone swallows a mouthful of the water, it can cause diarrhea lasting up to 3 weeks.

The survey also showed that 20% of adults say that they still pee in the pool. You may not know, but they also say that people should be showering before they go into the pool. A Health Department in Utah told KUTV that the average swimmer has about 10 grams of fecal matter on their body. That's about 4 pennies worth of poop at any moment. The health department also said that adults swallow about a teaspoon of pool water on the average swim, while children swallow even more.