Swimming and other water-related activities are excellent ways to get the physical activity needed for a healthy life, and millions of people enjoy oceans, lakes, rivers, pools, and spas each year. However, it is important to be aware of ways to prevent water-related adverse health events, such as sunburn and other injuries, drowning, and recreational water illnesses (RWIs). CDC's Healthy Swimming program provides information for the public and health professionals (for example, outbreak response toolkits and the Model Aquatic Health Code) on a variety of subjects.