The Shenango watershed (HUC 05030102) covers approximately 633 square miles in western Pennsylvania and eastern Ohio. It is characterized by rolling hills and valleys, with the Shenango River flowing through the center of the watershed. The hydrology of the watershed is influenced by both surface water and groundwater, with the majority of the water flowing into the Shenango River from smaller tributaries. The watershed experiences a range of weather conditions, including hot summers and cold winters, with an average annual precipitation of around 40 inches. Interesting climatic facts and trends include an increase in extreme precipitation events, which can lead to flooding in the watershed, as well as changes in snowpack accumulation and melt patterns. The reservoirs within the watershed are primarily used for flood control and recreation, with the water quality impacted by agricultural and urban land use practices in the surrounding areas.