Gilbert, the "Golden Rule Town," is home to approximately 208,453 people. Three school districts serve the children of Gilbert: Gilbert Public Schools District, Chandler School District, and Higley School District. Two utilities serve Gilbert residents and businesses: Arizona Public Service, which serves a four square mile area of central Gilbert, and the Salt River Project, which provides electricity to the rest of Gilbert and several industrial parks. Wastewater is treated by the Gilbert Utilities Department.