Block: The starting platform; the area from which a swimmer dives into the pool to begin a race. Cap: Latex or lycra head covering used during a race or workout to protect a swimmer's hair from the ...

When you swim, some water is going to get into your mouth. For the most part, that is OK. In recreational pools chlorine is used to kill germs although it can take its sweet time killing some of them.

"So, with thousands of swimming pools in that area we think that it could be a significant increase." Related: That even includes smaller bodies of water like Betsy Kahn's dipping pool.