The James River Basin of southwest Missouri is listed on the state’s 303(d) list as being impaired by nutrients from multiple point and nonpoint sources. In 2001, a Total Maximum Daily Load (TMDL) was developed for the James River that set nutrient limits and targets for both wastewater treatment facilities and urban nonpoint land use. The TMDL set in-stream eutrophication threshold target concentrations for total phosphorus (TP) at 0.075 mg/L and total nitrogen (TN) at 1.5 mg/L. Efforts to control point sources through improved tertiary treatment have reduced nutrient concentrations in the Lower James River between 60%-70%. However, nutrient concentrations still remain high in streams draining urban areas particularly during storm flows. To date, few studies have addressed urban nonpoint source pollution concerns in the James River Basin and knowledge of local urban storm water quality and the effectiveness of pollution reduction efforts in this area are incomplete. Water quality monitoring is therefore needed to better understand the role of these types of developments as nonpoint sources of nutrients in the James River Basin and to test the effectiveness of urban storm water controls at reducing pollution from these areas.
Owen, Marc R.; Pavlowsky, Robert T.; and Mulling, Adam D., "Water Quality Monitoring and Load Reduction Evaluation from Detention Basin Retrofits in Springfield, Missouri" (2016). OEWRI Technical Reports. 53.