USGS Groundwater Information
TWRI-B3 Chapter 2: Introduction to Ground-Water Hydaulics [12MB PDF], now with internal document links added
Groundwater-Level Response to Virginia 2011 Earthquake
Groundwater Technical Procedures of the USGS
WTAQ Version 2 — Computer program for calculating drawdowns and estimating hydraulic properties for confined and water-table aquifers
FLASH: A Computer Program for Flow-Log Analysis of Single Holes
USGS maintains a network of active wells to provide basic statistics about groundwater levels.
USGS Water Science Centers are located in each state.
Water Resources
Water Quality
Water Use
Surface Water
The U.S. Geological Survey provides unbiased, timely, and relevant information and studies about groundwater resources of the Nation.
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