An above grate based inlet filter system for erosion and sediment control comprises a filter mat configured to extend beyond the perimeter of the grate and a securing mechanism, such as magnets, configured to securing the filter mat around the perimeter of the grate. The system may include a filter berm secured in vicinity to the mat, and a rectangular array of magnets coupling the filter mat to the grate. The natural fiber filter mat may effectively be formed of vertically aligned coir fibers or alternatively of reticulated foam. Multiple side edges of the mat are undulating having a pattern of repeating recesses. The mat includes a plurality of high flow holes extending into the mat and which are closed at a bottom surface thereof. The mat includes at least one removable dewatering plug configured to allow for selective mat bypass.