Pervious paving (PPS) model rigs have been used in laboratory-based experiments to determine the impact of a glyphosate-containing herbicide (GCH) on the ability of the PPS to retain and biodegrade pollutants. Using three concentrations of GCH (7200, 720, and 72mgL(-1)) and used engine oil, it was found that hydrocarbon in the effluent increased with time, and with increasing GCH concentration. Turbidity increased and pH decreased with time, with the highest application of GCH declining by a whole pH unit to become slightly acidic. For Zn, Cu, and Pb, values for the lowest concentration of GCH, whilst slightly higher than the control mirrored its temporal trend and the highest concentration of GCH decreased with time. For the medium GCH concentration, however, Zn and Pb increased toward the end of the monitoring period. Dissolution experiments appeared to confirm speculation that the surfactant in the GCH may be forming an emulsion with the oil facilitating the release of metals associated with the oil. Particulate-associated pollutants possibly released from the aggregate may be desorbed as the pH declined in the PPS rig. This raises concerns for receiving water quality, particularly with UK legislation encouraging the use of sustainable drainage systems and therefore PPS.