Missouri Water Quality (305b) Report

Some of the challenges to the state’s water protection efforts are easy to recognize. However, the 305(b) report provides a more detailed look at a wide variety of impacts to water quality all across Missouri.

Click on an area below to view maps that show streams and lakes impaired by point sources and discrete (localized) nonpoint sources. These maps do not show nonpoint source problems such as stream channelization, aquatic habitat degradation due to agricultural or urban storm water runoff, or wide-scale land use changes such as conversion of rural to urban lands.

State Map for Water Quality Report. Map of Spring Elk River Basin Map of White River Basin Western Osage River Basin. Northwestern Tributaries to the Missouri River Basin map. Western Grand River Basin. Western Missouri River Basin map. Eastern Grand River Basin map. Northern Upper Mississippi River Basin map. Southern Upper Mississippi River Basin map. Central Missouri River Basin map. Eastern Osage River Basin map. Gasconade River Basin map. Eastern Missouri River Basin map. Northern Lower Mississipi River Basin Southeastern Lowlands Map. Current and Eleven Point River Basin map. Southern Lower Mississippi River Basin map. St. Francis River Basin map. Black River Basin map.