Emerald Ridge High School is a high school in the Puyallup School District of Washington, United States and is commonly referred to as ERHS or simply ER. Emerald Ridge opened in September 2000. It features green, black and silver as its primary colors and has a jaguar as its official mascot. The enrollment is currently around 1,600 In the 2008-2009 school year, 10th graders showed 90.1% competency in Reading, 55% in Math, 97.7% in Writing and 44.4% in Science.