Data Basin is a science-based mapping and analysis platform that supports learning, research, and sustainable environmental stewardship.
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River segments and estuaries designated under Section 303(d) of
the Clean Water Act. Each State will establish Total Maximum Daily Loads
(TMDLs) for these waters. Most Current 303(d) Waterbodies coded onto NHD
Waterbody reaches (region.rch) to create Waterbody Shapefiles.
Data Provided By:
Great Lakes Geographic Information System, U.S. Environmental Protection Agency
Layers in this dataset are based on combinations of the following options.
You may choose from these options to select a specific layer on the map page.