The Racoon Symmes Watershed (HUC 05090101) is located in southwestern Ohio and covers approximately 191 square miles. It is predominantly an urban watershed, with about 90% of the land area being developed or urbanized. The hydrology of the watershed is characterized by a series of small tributaries that flow into the Great Miami River. The area experiences typical Midwestern weather patterns, with a humid continental climate and significant precipitation throughout the year. The winter months bring an average of 20 inches of snowfall, which contributes to the seasonal snowpack. Surface water sources in the watershed include the Great Miami River and a few small lakes and ponds. There are no major reservoirs or dams in the watershed, and the primary constituents of the surface water are nutrients, sediment, and bacteria. The area has experienced some climate change impacts, including more frequent and intense precipitation events and warmer temperatures.