USGS Groundwater Information
Groundwater Resources Program
New & Noteworthy
USGS Groundwater Watch
USGS maintains a network of active wells to provide basic statistics about groundwater levels.
Other Water Topics
USGS in Your State
USGS Water Science Centers are located in each state.
Groundwater recharge is a critical part of the overall water budget and is one of the most difficult components to quantify. The mapping of the spatial and temporal variability of recharge remains a topic of great interest. Improved knowledge of this variability would help water managers to better assess water availability and protect vulnerable aquifers under stresses from expanding urbanization or drought. Recharge estimates should be detailed enough to resolve local variability while also providing accurate regional values needed to manage a regional groundwoater system.
The Groundwater Resources Program supports activities that develop a better understanding of recharge processes at local scales and also develop capabilities to estimate recharge at the scale of regional aquifer systems. Recent examples of such investigations include: