California Erosion and Sediment Control Ordinance refers to a set of regulations and guidelines established by the state of California to address the growing concern of soil erosion and sediment runoff. These ordinances aim to protect and preserve the state's natural resources, including rivers, lakes, and water bodies, by implementing preventative measures and best management practices (BMPs) to control erosion and manage sedimentation. One prominent type of California Erosion and Sediment Control Ordinance is the Construction General Permit (CAP), developed by the California State Water Resources Control Board (SW RCB). The CAP encompasses various erosion and sediment control requirements specifically tailored for construction sites. These requirements mandate the implementation of erosion and sediment control plans, site stabilization measures, and stormwater management techniques to prevent soil erosion and minimize sediment runoff from construction activities. Furthermore, specific regions within California may have their own localized erosion and sediment control ordinances designed to address unique geographical, climate, and land-use factors. These local ordinances may include additional provisions and stricter regulations to ensure comprehensive erosion and sediment control. Keywords: California, erosion and sediment control ordinance, regulations, guidelines, soil erosion, sediment runoff, natural resources, rivers, lakes, water bodies, preventative measures, the best management practices, BMPs, construction general permit, CAP, state water resources control board, SW RCB, erosion and sediment control plans, site stabilization measures, stormwater management, construction activities, regions, localized ordinances, geographical, climate, land-use, provisions, stricter regulations.