Memorial Day Weekend. Picnics. Hot weather. Summer fun. To keep swimming safe and fun, the Centers for Disease Control and Prevention (CDC) is urging parents to teach their children not to swallow pool water. It's best to try to keep water out of the mouth, but if water does get in, it's important not to swallow. Swallowing water that contains traces of stool is the number one way that infections are spread in a swimming pool. Frequent bathroom breaks, and careful washing before entering the pool, help stop the spread of infection. And of course, anyone with diarrhea should avoid swimming. Swimming is a great way to enjoy active fun! These precautions make it even better.