A liquid supply facility comprising: a flow path through which liquid supplied from a supply source of liquid flows; and an ultrafine bubble generating apparatus generating ultrafine bubbles in liquid, wherein the flow path is branched at its intermediate point into a plurality of flow paths including a first flow path and a second flow path, wherein the ultrafine bubble generating apparatus includes: a liquid discharger discharging liquid taken in from the second flow path; a gas incorporating device pressurizing gas and incorporating the gas into liquid discharged from the liquid discharger; and an ultrafine bubble generator generating ultrafine bubbles in liquid by allowing liquid having gas incorporated therein to pass through an inside of the ultrafine bubble generator, wherein ultrafine bubbles generated by the ultrafine bubble generator are nanobubbles with a diameter of less than 1 um, wherein the liquid discharger is configured to take in liquid from the second flow path with a pressure of liquid entering the liquid discharger through the second flow path being positive, wherein, between the liquid discharger and the ultrafine to bubble generator, the gas incorporating device is configured pressurize gas and incorporate the gas into liquid being in a pressurized state and flowing toward the ultrafine bubble generator, wherein the ultrafine bubble generator is a nozzle, and the ultrafine bubble generator ejects nanobubble-containing liquid from a tip part of the nozzle, and wherein the tip part of the nozzle is connected to the first flow path on a downstream side of a branch point where the flow path is branched. a flow path through which liquid supplied from a supply source of liquid flows; and an ultrafine bubble generating apparatus generating ultrafine bubbles in liquid, wherein the flow path is branched at its intermediate point into a plurality of flow paths including a first flow path and a second flow path, wherein the ultrafine bubble generating apparatus includes: a liquid discharger discharging liquid taken in from the second flow path; a gas incorporating device pressurizing gas and incorporating the gas into liquid discharged from the liquid discharger; and an ultrafine bubble generator generating ultrafine bubbles in liquid by allowing liquid having gas incorporated therein to pass through an inside of the ultrafine bubble generator, wherein ultrafine bubbles generated by the ultrafine bubble generator are nanobubbles with a diameter of less than 1 um, wherein the liquid discharger is configured to take in liquid from the second flow path with a pressure of liquid entering the liquid discharger through the second flow path being positive, wherein, between the liquid discharger and the ultrafine to bubble generator, the gas incorporating device is configured pressurize gas and incorporate the gas into liquid being in a pressurized state and flowing toward the ultrafine bubble generator, wherein the ultrafine bubble generator is a nozzle, and the ultrafine bubble generator ejects nanobubble-containing liquid from a tip part of the nozzle, and wherein the tip part of the nozzle is connected to the first flow path on a downstream side of a branch point where the flow path is branched. a liquid discharger discharging liquid taken in from the second flow path; a gas incorporating device pressurizing gas and incorporating the gas into liquid discharged from the liquid discharger; and an ultrafine bubble generator generating ultrafine bubbles in liquid by allowing liquid having gas incorporated therein to pass through an inside of the ultrafine bubble generator, wherein ultrafine bubbles generated by the ultrafine bubble generator are nanobubbles with a diameter of less than 1 um, wherein the liquid discharger is configured to take in liquid from the second flow path with a pressure of liquid entering the liquid discharger through the second flow path being positive, wherein, between the liquid discharger and the ultrafine to bubble generator, the gas incorporating device is configured pressurize gas and incorporate the gas into liquid being in a pressurized state and flowing toward the ultrafine bubble generator, wherein the ultrafine bubble generator is a nozzle, and the ultrafine bubble generator ejects nanobubble-containing liquid from a tip part of the nozzle, and wherein the tip part of the nozzle is connected to the first flow path on a downstream side of a branch point where the flow path is branched.