Guam Hydrological Survey - Established to consolidate, inventory, and evaluate all of the current and historical hydrologic data pertaining to Guam. Site topics include topography, water quality, and karst.
National Water and Climate Center (U.S.) - Activities include forecasts of snowpack, streamflow, soil moisture and other climate variables relevant to hydrology and agriculture.
MED-HYCOS 2.0 Mediterranean Hydrologic Observing System - Project monitors hydrologic conditions in 19 Mediterranean countries, to help the region to better cope with difficulties of water excess or scarcity, water pollution and environmental degradation.