The Ashtabula-Chagrin Watershed (HUC 04110003) is located in northeastern Ohio and covers an area of approximately 567 square miles. The watershed is fed by several small tributaries that eventually flow into Lake Erie. The region experiences a humid continental climate with cold winters and warm summers. The area receives an average annual precipitation of 39 inches, with snowfall occurring in the winter months. The snowpack in the watershed is generally light, with an average snow depth of around 20 inches. Surface water in the watershed is used for various purposes, including municipal water supply, recreation, and irrigation. The reservoirs in the watershed contain a mix of constituents, including phosphorus, nitrogen, and sediment, which can lead to water quality issues. In recent years, the region has experienced more frequent extreme weather events, including heavy rainfall and flooding. This has led to increased erosion and sedimentation in the watershed, impacting water quality and aquatic habitats. Efforts are underway to address these issues through improved land management practices, increased monitoring and research, and development of new technologies for water quality management.