Hydrogeology
Illinois State Geological Survey
Illinois State Water Survey
Illinois Department of Natural Resources, Office of Water Resources
Dartmouth Flood Observatory
National Aeronautics and Space Administration (NASA), Global Hydrology and Climate Center
National Oceanic and Atmospheric Administration (NOAA), National Operational Hydrologic Remote Sensing Center
Safe Drinking Water is Essential, U.S. National Academy of Sciences and the Global Health and Education Foundation
Updated 9/28/2009 JKH