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dr. john torez. >> i always >> it doesn't kill the urine, and the smell is urine mixed with the clo reenreporter: this is gross. but are there any real health risks? >> there are some. when the urine mixes with the chlorine, it can irritate your lung and skin. you wouldn't know where it's coming from. >> reporter: we have one big category left, hot tubs. notorious breeding grounds for germs and bacteria, but we've never tested for pee before. bad news. we test two hot tubs, and both have urine. in the end from the water park to the hot tubs and pools we tested, only one, yes, just one came back pee free. >> don't pee in a pool. tell your family and friends, don't pee in the pool. that's going to be tough. 64% of americans say they pee in pools. the only way to get rid of it completely is to everyone thety and drain the pool and refill it back up. hotels don't do that. >> 64% of people admit it? >> yeah. >> little kid pea? four-year-olds, five-year-olds, for some reason, i don't know why are you looking at me that way. for some reason a 77-year-old man versus a two-year-old. >> no one get