Abstract: A pool safety sensing system to attempt to reduce the likelihood of drowning visually observes a zone with a camera, and if detected motion occurs, and alarm is generated. The alarm can be visible, audible, text based (email, with or without attached images, instant message) or telephonic. Alarm events can be stored for future reference. Zones of sensing or zones to ignore when monitoring may be defined in the field of view of the camera. Motion thresholds, such as size of moving object, speed of movement, can be employed to adapt to particular location requirements and types of sensing.