Other
The Sierra Club: Clean Water
The Sierra Club, an environmental organization, provides detailed news and information regarding the current U.S. waters and wetland quality. Content includes overviews, factsheets, features, a quiz, and more.
Center for Educational Technologies
Exploring the Environment: Water Quality #2
Use this case study from the Wheeling Jesuit University and a real world type problem to learn about water pollution and water quality assessment. Lots of supporting material.