EPA

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Automated Geospatial Watershed Assessment Tool (2018)

This tool is a GIS-based hydrologic modeling tool designed for both novice and expert GIS users.
Getting in Step: Engaging Stakeholders in Your Watershed (2013)

This guide is intended to assist agencies, organizations, and companies involved with watershed management activities with building a stakeholder group.
National Water Quality Data Portal (2017)

The National Water Quality Data Portal (WQP) is a cooperative service sponsored by the United States Geological Survey (USGS), the Environmental Protection Agency (EPA) and the National Water Quality Monitoring Council (NWQMC) that integrates publicly available water quality data.
Reducing Stormwater Pollution – Good Practices In Timber Products Facilities

This good practice looks at ways to mitigate stormwater pollution from timber products facilities.
WATERS Geospatial Data (2015)

Supplies data for the EPA’s Office of Water Programs, including 303(d) Impaired Waters, 305(b) Waters As Assessed and Total Maximum Daily Loads (TMDLs), are available as prepackaged national downloads or as more current GIS web and data services.