State's Environmental Protection Agency (EPA), Office of Water

State's Geological Survey (USGS), Water Resources of the United States

State and Local Government Sites:

Department of Natural Resources

Surf your Watershed

Maryland Biological Stream Survey (MBSS)

Maryland Department of the Environment

Organizations:

Alliance for the Chesapeake Bay

Severn River Fact Sheet

Center for Watershed Protection

Maryland Save Our Streams (SOS)

Severn River Association

Scenic Rivers Land Trust (Severn River Land Trust)