In addition to flooding and damaging flows to the creek, stormwater pollution is also a serious concern. As rain washes over the developed landscape, it may be contaminated by oil and grease, heavy metals, pet waste, sediments, chemical fertilizers and pesticides.
The SEA Street design cleanses stormwater through a series of natural functions. The plants and soils filter pollutants as rainwater moves through the swales, preventing them from traveling downstream to sensitive water bodies such as creeks and lakes. Bacteria within healthy soils can also help break down carbon-based pollutants like motor oil.