Nine people drown per day in the US. That's the average. It does not even include drownings from boat accidents. According to the Centers for Disease Control and Prevention drowning rates have declined over the years, but drowning is still the second-leading cause of injury-related deaths of children.
While most drownings of infants under a year
of age occur in bathtubs, buckets, or toilets, most drownings of children one to
four
years of age occur in residential swimming pools. The facts surrounding the
drownings of young children in residential pools can send a chill down any
parent's spine.
If you have a pool at home, be sure it is as safe as possible. Never, ever, leave a child unsupervised in or near a pool.

The American Red Cross recommends the following steps to maximize the safety of home swimming pools:
Many devices have been developed to improve pool safety, including monitors that sound when someone enters the water and wristband-style monitors that sound if a child falls into the water. While many people purchase these devices, they should be used only as a supplemental security measure and should never replace parental oversight and/or adult supervision of pool areas.
Pool covers have also been advertised as having a "perfect safety record." They are best considered supplemental and should never replace the need for proper fencing on all sides of a pool.
Reference: Centers for Disease Control
Injury drowning facts by SafeKids.org
Drowning is the second leading cause of unintentional injury-related death among children ages 1 to 14. The majority of drownings and near-drownings occur in residential swimming pools and in open water sites. However, children can drown in as little as one inch of water and are therefore at risk of drowning in wading pools, bathtubs, buckets, diaper pails, toilets, spas and hot tubs.
Drowning usually occurs quickly and silently. Childhood drownings and near-drownings can happen in a matter of seconds and typically occur when a child is left unattended or during a brief lapse in supervision. Two minutes following submersion, a child will lose consciousness. Irreversible brain damage occurs after four to six minutes and determines the immediate and long-term survival of a child. The majority of children who survive (92 percent) are discovered within two minutes following submersion, and most children who die (86 percent) are found after 10 minutes. Nearly all who require cardiopulmonary resuscitation (CPR) die or are left with severe brain injury.
DROWNING DEATHS AND INJURIES
WHEN AND WHERE DROWNINGS AND NEAR-DROWNINGS OCCUR
WHO IS AT RISK
In addition to close supervision, CPSC recommends layers of protection, including barriers, such as a fence with self-closing, self-latching gates, completely surrounding pools to prevent unsupervised access by young children. If the house forms a side of the barrier, use alarms on doors leading to the pool area or a power safety cover over the pool. It is important to always be prepared for an emergency by having rescue equipment and a phone near the pool. Also, parents should learn cardiopulmonary resuscitation (CPR).
There are about 260 drowning deaths of children younger than 5 each year in swimming pools. About 77 percent of the victims had been missing for 5 minutes or less when they were found. Precious time is often wasted looking for missing children anywhere but in the pool. Since every second counts, always look for a missing child in the pool or spa first.
Parents may think that if their child falls in the water, they will hear lots of splashing and screaming, and that they will be able to come to the rescue. Many times, however, children slip under the water silently. Even people near or in the pool have reported hearing nothing out of the ordinary during drowning incidents.