A sump system includes a catch basin and a sump pump. The catch basin is configured to receive runoff water. The catch basin has an upper end and a bottom surface. The catch basin defines a vertical chamber and a horizontal chamber. The vertical chamber extends downward in a vertical direction from the upper end to a first portion of the bottom surface. The horizontal chamber intersects the first chamber to form an intersecting region. The horizontal chamber is defined by an upper surface and a second portion the bottom surface. The horizontal chamber extends outwardly in a horizontal direction from an outer periphery of the first chamber and has a vertical dimension that extends upward from the bottom surface to the upper surface. The upper surface is positioned below the upper end. The sump pump is disposed within the catch basin.