A pet water supply system includes a housing that has a bottom wall, a top wall and a peripheral wall that is attached to and extends between the top and bottom walls. A basin is integrally coupled to the peripheral wall and is positioned adjacent to the bottom wall. A water outlet extends through the peripheral wall and fluidly couples the housing to the basin. A drain conduit is fluidly coupled to the basin. A pump is fluidly coupled to the drain conduit and to the housing. The pump is configured to pull the water through the drain conduit and depositing the water into the housing. A water filter is in fluid communication with the drain conduit and filters that is moved through the drain conduit by the pump.