USGS Groundwater Information Pages

Groundwater Basics

• What is groundwater?
• How do I find groundwater levels?
• How do I find aquifer information?
• Ground Water & the Rural Homeowner

More groundwater basics ...

Data & Information

• USGS Groundwater Data (NWIS)
• USGS Groundwater Watch
• Water Use in the U.S.
• Ground Water Atlas of the U.S.
• National Aquifer Code Reference List
• National Atlas - Principal Aquifers

More data & information ...

Selected Topics

• Groundwater/Surface-water Interactions
• Karst
• Artificial Recharge
• Land Subsidence
• Regional Groundwater Studies

More topics ...

Publications

• Selected USGS Groundwater Publications
• USGS Publications Warehouse
• USGS Library
• Water-Resources Publications
• Recent Publications
  • Groundwater Technical Procedures of the USGS
  • WTAQ Version 2 — Computer program for calculating drawdowns and estimating hydraulic properties for confined and water-table aquifers
  • PHAST v.2: Simulating Groundwater Flow, Solute Transport, and Multicomponent Geochemical Reactions (TM 6-A35)
  • USGS Groundwater Modeling Software: Making Sense of a Complex Natural Resource
  • GWM-2005 — A Groundwater-Management Process for MODFLOW-2005 with Local Grid Refinement (LGR) capability
  • Estimated Water Use in the U.S. in 2005: Summary | Full Report | Data
  • Fact Sheet: Effects of Climate Variability and Change on Groundwater Resources of the U.S.

More publications ...

Methods & Modeling

• Groundwater Software
  • MODFLOW-2005
  • PHAST v.2: Simulation of Groundwater Flow, Solute Transport, and Multicomponent Geochemical Reactions
  • MODFLOW-2005 with the Farm Process
  • ModelMuse: Graphical User Interface for MODFLOW-2005 and PHAST (TM 6-A29)
  • CFP: Conduit Flow Process for MODFLOW-2005
• Geophysics
• Estimating Recharge in Humid Regions

More methods & modeling ...

Need More Information?

• View the Office of Groundwater contact information page
• Contact the Office of Groundwater online
• Call the Office of Groundwater at 703-648-5001
• For general USGS questions, contact Ask USGS online or call 1-888-ASK-USGS (1-888-275-8747)