An assembly of devices designed for use by healthcare personnel, patients, or other persons for hand washing, and without installation to external water supplies and/or drainage. It typically consists of a structure made of plastics, metals, or a combination of these materials, and usually includes a fresh water tank, a waste water tank, tubing, and taps (faucets); it may also include a soap dispenser, a paper towel rack, and an electrically-powered water pump. A portable sink is used in field work, during emergencies, in mobile medical facilities and shelters, and for personal hygiene of persons with a disability that cannot move from a location.