NSPI statistics show that drowning and swimming accidents are best prevented by adult supervision, public awareness programs including water safety training for young children, and not drinking alcohol while swimming, diving or soaking. Statistically, most accidents involving drowning or severe injury occur to children under 5 years of age who are unsupervised, cannot swim, and fall into a pool or pool cover with water on top. Toddlers at the age of 2 or 3 are most likely to wander off from a parent's supervision. Barriers such as fences or back doors are often left unlocked. Drowning is NOT accompanied by loud noise or splashing sounds. DROWNING IS SILENT! To prevent child drowning, there is NO!!!!! substitute for parental supervision.

The second largest number of accidental injuries occur to teenagers, primarily males. Often the victim has been drinking alcohol and has dove into the pool in an area too shallow for diving, or from a location not intended for diving (like the roof of the house). Many of those who "drink and dive" end up in a wheelchair, if they're lucky. Alcohol and spas are also a potentially lethal combination; the hot water and the alcohol combine to cause individuals to fall asleep and drown in only three feet of water.

Other hazards exist from standing water on top of solid pool covers. Small children and animals can drown in as little as a few inches of water. Cover pumps are available and must be used, or switch to a mesh type safety cover. Solar blankets or solid covers must be completely removed before entering the water. Entrapment by the suction of a single main drain on long hair or small arms and legs has been the cause of drowning in the past. New standards require double main drains or a safety switch to prevent this.