Commercial buildings can obtain four different levels of LEED Certification. The highest level a building can achieve is a Platinum rating, followed by Gold, Silver and Certified. The level a building achieves is determined through 7 separate categories; Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, Indoor Environmental Quality, Innovation and Design Process and Regional Priority Credits. Through these categories, a building can achieve a maximum of 110 points. To achieve a Platinum rating, a building must be awarded 80 or more points out of the possible 110, Gold requires 60-80 points, Silver 50-60 and the minimum amount of points required for a building to be LEED Certified is 40.