A spill containment system for dispensing a berm of containment material on a support surface around a liquid spill to inhibit the liquid spill from spreading across the support surface includes a container receiving the containment material. The container includes a bottom wall and a perimeter wall that extends upwardly from the bottom wall to define an interior space of the container. A dispensing assembly is coupled to the container. The dispensing assembly is actuated to dispense the containment material from the container. The dispensing assembly controls flow of the containment material through a dispensing aperture that extends through a rear wall of the perimeter wall.