New & Noteworthy

 Field Techniques for Estimating Water Fluxes Between Surface Water and Ground Water (TM 4–D2)

 Ground-Water Availability in the United States (Circular 1323)

 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 in Your State

USGS Water Science Centers are located in each state.

Contact the USGS Office of Ground Water

The U.S. Geological Survey provides unbiased, timely, and relevant information and studies about ground-water resources of the Nation.

Phone: (703) 648-5001

Online: Contact us using our online form for feedback and questions.

Mail:
USGS Office of Ground Water
411 National Center
12201 Sunrise Valley Drive
Reston, VA 20192

While we make every effort to reply to your inquiries as soon as possible, please allow up to seven days for a response.

Contact Information for Other USGS Resources

For general USGS questions, contact Ask USGS online or call 1-888-ASK-USGS (1-888-275-8747).

For other national USGS water information, you can contact:

• USGS Water Resources Discipline
• USGS Office of Water Quality
• USGS Office of Surface Water

For local USGS water information or data, contact the USGS Water Science Center in your area by clicking on the state:

To locate a specific USGS employee, use the Electronic Phone Book.

For media inquiries, the USGS Office of Communications staff is available to the media around-the-clock.

The USGS does not regulate water use or water quality or enforce ground-water or drinking-water standards. For information on ground-water and drinking water regulations, contact the U.S. Environmental Protection Agency Office of Ground Water and Drinking Water.You can also report spills or environmental violations to the U.S. Environmental Protection Agency.