Some apartment complexes, condos and individual houses have swimming pools. It's more common in areas with hotter climates. Some companies have started specializing in very small pools with a water flow, so a swimmer can swim against the flow, but stay in place, sort of like a water treadmill.
If you have a pool, you need to take safety precautions. ... For instance, it is important to ensure that small children or pets will not accidentally fall into the pool. Often this protection is provided by a fence.
Pools require a good bit of maintenance. ... A pool in a climate where it freezes, needs to be drained for winter. Water should be treated to keep algae and other unwanted things from growing.