Excess fertilizers and pesticides applied to lawns and gardens wash off, are carried through the storm sewer system, and pollute the waterbodies. Yard clippings (grass, brush, etc.) and leaves can wash into storm drains and can choke, suffocate, or disable aquatic life. Be sure to cover piles of dirt or mulch being used in landscaping projects. Do not over fertilize or use pesticides during a forecasted rain event. Leaving pet waste on the ground increases public health risks by allowing harmful bacteria and nutrients to wash into the storm drain and eventually into local waterbodies