The Chautauqua Conneaut Watershed (HUC 04120101) covers approximately 1,050 square miles in western Pennsylvania and eastern Ohio. The majority of the watershed is drained by the Conneaut Creek, which is known for its excellent fishing and recreational opportunities. The watershed receives about 40 inches of precipitation per year, with winter snowpack being a significant contributor to surface water resources. The watershed has several reservoirs, including the Pymatuning Reservoir, which is the largest lake in Pennsylvania. The reservoir is used for flood control, recreation, and water supply. The watershed's climate is characterized by warm summers and cold winters, with average temperatures ranging from 20°F in January to 75°F in July. Recent trends show an increase in precipitation and temperature, leading to more frequent flooding events. Efforts are underway to improve water quality and reduce the risk of flooding by implementing best management practices in agricultural and urban areas.