Polluted stormwater runoff is a leading impediment to meeting water quality standards in the Bay. Urban stormwater has the dubious distinction of being the fastest growing nutrient source in the Chesapeake Bay, and is also a major source of sediment, pesticides and trace metals to the Bay. Although the stormwater problem has been recognized for two decades, federal, state and local land development regulations have had little impact on the problem – runoff pollution continues unabated in most parts of the Bay.