New & Noteworthy

 CFP: Conduit Flow Process for MODFLOW-2005

 GSFLOW: A New Model for Simulation of Ground-Water and Surface-Water Interaction

 SEAWAT v4: Simulation of 3D Variable-Density Ground-Water Flow and Transport

USGS Ground Water Watch

USGS maintains a network of active wells to provide basic statistics about ground-water levels.

USGS in Your State

USGS Water Science Centers are located in each state.

Ground-Water Data

• Ground-water Levels
  • USGS Online Ground-water Data (NWIS)
  • USGS Ground Water Watch
• Aquifers
  • Ground Water Atlas of the U.S.
  • National Atlas - Principal Aquifers
• Water Use in the U.S.
• USGS Water Quality Data
• Your local USGS Water Science Center
• Water Resources Maps and GIS Information
• National Cooperative Geologic Mapping Program
  • National Geologic Map Database Project
  • Geologic Names Lexicon
• USGS Maps, Imagery, and Publications
• Science in Your Watershed
• USEPA Drinking Water Data & Databases
• Other sources of ground-water information