Washington was the first state to enact legislation mandating that state buildings achieve at least Silver Leadership in Energy and Environmental Design (LEED) ratings by the U.S. Green Building Council. The WSU Everett building is certified LEED Gold by the U.S. Green Building Council for the sustainability features in construction and operation. The building uses photovoltaic arrays, natural ventilation, natural lighting, rainwater harvesting, radiant flooring, rain gardens and advanced LED fixtures. According to the U.S. Green Building Council, WSU Everett is one of six LEED Gold buildings in Everett, Wash. Read more about LEED certification.