The United States Geological Survey’s Office of Water Information.

We are committed to advancing USGS science by integrating data across scales and domains, improving access to data and research, and developing tools for analysis and visualization, fostering collaboration with the international community.

This information is preliminary and is subject to revision. It is being provided to meet the need for timely best science. The information is provided on the condition that neither the U.S. Geological Survey nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of this information.