This Watershed Boundary dataset for Michigan lists the hydrologic units for watersheds in Michigan.
This resource outlines USDA's source water protection program.
The United States Department of Agriculture - Agricultural Research Service (USDA-ARS) developed this computer-generated model to estimate the nutrient loads coming from sub-basins in areas with insufficient water quality monitoring data. The model has been run in areas like the Lower Maumee where there is enough water quality monitoring data to calibrate the program.
The Environmental Protection Agency Source Water Protection page provides information on source water assessments, community planning, funding, and partnerships focused on source water protection.
A Natural Solution to Water Security: New report analyzes 4,000 cities to demonstrate the health, climate and biodiversity benefits of source water protection.
The Ohio Environmental Protection Agency provides an online GIS webpage containing spatial data on source water assessment and protection areas.
This mapping tool shows the distribution of aquifers in Ohio.
This mapping tool delineates groundwater resources within Ohio.
The Michigan Water Strategy outlines a vision for managing and protecting freshwater resources.