US Environmental Protection Agencies
Thomas: Congressional Information (Library of Congress)
Master List of Federal Web Sites
Food and Drug Administration: Ctr. for Food Safety and Nutrition
American Water Works Association
Association of Environmental Engineering Professors
CEDAR Mailing List Archives (ENVENG-L, etc.)
Natural Resources Defense Council (NRDC)
The MathWorks: A lot of my simulation and computation work is done with MatLab -- this is the corporate home page for the vendor.