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Federal rolling
U.S. EPA Office of Research and Development

EPA National Stormwater Calculator

Free EPA tool for estimating stormwater runoff at a site and testing green infrastructure scenarios.

Federal rolling
U.S. EPA Office of Water

EPA Watershed Index Online (WSIO)

A national watershed indicator data library and comparative analysis tool for ranking and screening watersheds within a user-defined…

2016 SD Leopold Conservation Award Winners- Cronin Farms & Dan Forgey Federal annual
USDA Natural Resources Conservation Service

USDA NRCS Source Water Protection

NRCS assistance for actions that safeguard, maintain, or improve sources of drinking water and their contributing areas.