US Geological Survey
U.s. Geological Survey: Groundwater Information by Topic
A massive amount of information about groundwater. Topics covered include groundwater basics, humans and groundwater, groundwater quality, and its place in the water cycle. Includes true-and-false quiz and a Q&A section, as well as a...
US Geological Survey
Usgs: Earth's Water Surface Water
This site has everything you might want to know about surface water and things you probably didn't even imagine! Click Home to access the site in Spanish.
PBS
Nh Pbs: Nature Works: Rivers and Streams
Learn more about Rivers and Streams through this educational resource. This site features photographs, a description, fun facts, and more about this type of freshwater ecosystem.