Infections from swimming?

This morning, while swimming at a gym I occasionally visit, the gym staff put up the yellow "do not enter" (police-like) tape and then asked me to leave the pool saying there was a problem with the chlorine. This is the second time in less than a week that the pool was closed down. A woman in the locker room told me that the three women, who are the most frequent swimmers in the morning, have all come down with bladder infections. They all believe it is from the pool. Does anyone know if this is actually possible? Can you catch something like a bladder infection from a pool? :confused: