Abstract: A drain filter pad and system for the same for preventing silt, debris and contaminants carried by storm and other runoff water from entering a storm drainage system. The filter pad comprises a porous outer shell with a permeable pad enclosed in the outer shell for attachment to the upper surface of the drain inlet grate. The outer shell is a synthetic mesh that blocks debris and larger contaminants from the drainage system. The permeable pad is an organic material that blocks silt and absorbs contaminants. The outer shell has an opening at one end for replacing the permeable pad. A closure mechanism closes the permeable pad in the outer shell. Fasteners securely attach the filter pad to the inlet grate without requiring removal of the grate. One such fastener passes through holes in the filter pad to interact with the underside of the grate.