A pet litter box with a sloped floor holding a quantity of non-absorbent litter and a drain in the low part of the floor that connects by tubing to a liquid waste collection bladder. The pet litter box having legs at four corners or a supportive structural skirt at its perimeter to maintain space between the floor of the pet litter box and the resting surface. The bladder is made of a flexible, impermeable material and is positioned below the drain in the floor of the pet little box to allow the flow of liquid waste from the drain through flexible tubing into the bladder. The tubing can be disconnected from the bladder to allow draining of the bladder into a toilet or other disposal container.
