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Water Quality Mapping
The following maps provide an overview of the contribution of the various
watersheds in the Upper Mississippi Basin to the primary contaminants of Suspended Solids and Nitrogen.
Other maps of the Basin can be used to assess the contribution of various practices, topography, and policies
to the levels of these contaminants found in waters throughout the Basin. Another valuable assessment of
agricultural contributions to water contaminants in the Mississippi Basin can be found in the following
publication: Agricultural Nitrogen Trends
in the Mississippi Basin, 1949-1997.
The various factors influencing the quality of waters in the Upper Mississippi Basin can be further assessed
with the help of the information contained in the following series of maps. Follow the links to view maps
according to theme. |
