20 gross pool facts that some might scare you off swimming

The concentration of chemicals in swimming pools is higher than in bleach!
By a lot. According to the Environmental Protection Agency, bleach contains 5% chlorine and other household cleaners have just 2% chlorine, but the chemicals in pools contain 12 to 95% chlorine, depending on the size of the pool. Why so strong? Because pools' chemicals, which keep bacteria at bay, are diluted with much more water.