Technical Abstract: Golf courses are particularly vulnerable to phosphate (PO43-) and pesticide loss by infiltration because of the sandy, porous grass rooting media used and presence of subsurface tile drainage. In this study, an effort was made to filter PO43-, chlorothalonil, mefenoxam, and propiconazole in putting green drainage water using a blend of industrial byproducts, including granulated blast furnace slag (GBFS), cement kiln dust (CKD), silica sand, coconut shell activated carbon (CS AC), and zeolite. Two, six-hour storm events were simulated by repeated irrigation of the golf green immediately following a PO43- and pesticide application. Drainage flow ranged from 26 L/s to 2316.01 L/s throughout the course of the simulations. A significant decrease in chlorothalonil load for the experimental run was observed compared to the control (p < 0.05). The median decrease in chlorothalonil was 69.35%, while that of the control was 0%. In general, percent reductions in chlorothalonil were very high (> 80%) near peak flows. In contrast, the filter material did not remove statistically significant quantities of PO43-, mefenoxam, nor propiconazole (p > 0.05). High flow rates, minimal contact time with filter media, pesticide chemistry, preferential flow, and sorption, ion exchange, and precipitation kinetics may all have influenced the filter’s contaminant removal efficiency. More research is needed to determine the optimal blend and configuration for the filter media to remove significant amounts of all contaminants investigated.