A swimming pool, also known as a bath or wading pool, is a man-made structure designed to hold water for swimming and other recreational activities. The pool can be built into the ground (in-ground pools) or above ground, as a freestanding construction or as part of a building or other larger structure such as a hotel or ocean liner. A pool can be of a custom size and shape or built to a standardized size such as an Olympic-sized swimming pool. Regardless of their size or shape, most swimming pools work in the same basic way by using a system of filtration and chemical treatment to continually clean a large volume of water.
While there are many different types of swimming pools, the majority use chlorine as a sanitizer to kill bacteria and keep the water safe for swimmers. Pools also feature a mechanical pumping system that recirculates the water to continuously clean it. In addition, most swimming pools utilize a sand or cartridge filter to help reduce the amount of chemicals used and the associated environmental impact.
Swimming pools are commonly used for leisure activities such as recreational swimming, diving and water sports, including synchronized swimming and water polo. They are also used for training purposes, such as teaching lifesaving and scuba diving techniques, and water-ditching survival skills for aircraft and submarine crews and astronaut training.
NYC Parks operates 53 outdoor swimming pools from late June until the Sunday after Labor Day, as well as 12 indoor pools located at our recreation centers.
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