Lower Mississippi-Gulf Water Science Center


Welcome to the USGS Web page that provides access to water resources information for the Lower Mississippi-Gulf.


Real-time data:

Streamflow:   AL || AR || LA || MS || TN

Water quality:   AL || AR || LA || MS || TN

Groundwater levels:    AL || AR || LA || MS || TN

Precipitation:    AL || AR || LA || MS || TN

Water use:    AR || LA || MS || TN

Follow Us On Twitter

Hydrologic Data at LMG

Hydrologic Data at LMG

We provide current and historical surface-water, groundwater, water quality, water use, and ecological data in various formats (map, graphical, tabular)

Water Data at LMG

Science at LMG

Science at LMG

The Lower Mississippi Water Science Center collects high-quality hydrologic data and conducts unbiased, scientifically sound research on Alabama, Arkansas, Louisiana, Mississippi, and Tennessee water resources.

Science at LMG

Quick links - Water Conditions for the nation

See current and historical water data for the United States. Here you can find information from floods to droughts for the entire nation.

USGS Streamstats

USGS WaterWatch - Current Streamflow

USGS WaterWatch - Flood

USGS WaterWatch - Drought

USGS WaterWatch - Past Flow/Runoff

USGS WaterWatch - Animation

USGS WaterWatch - Toolkit



Date published: May 20, 2021

Media Alert: Flights Above the Mississippi Alluvial Plain to Continue Aquifer Mapping

Editor:  In the public interest and in accordance with Federal Aviation Administration regulations, the USGS is announcing this low-level airborne project.  Your assistance informing the local communities is appreciated.  

Date published: October 7, 2020

USGS Deploying Storm Tide Sensors Along Gulf Coast for Hurricane Delta

To learn more about USGS’s role in providing science to decision-makers before, during and after Hurricane Delta, visit the USGS Hurricane Delta page at www.usgs.gov/delta.  


Publication Thumbnail
Year Published: 2021

Water resources of Grant Parish, Louisiana

Information concerning the availability, use, and quality of water in Grant Parish, Louisiana, is critical for proper water-supply management. The purpose of this fact sheet is to present information that can be used by water managers, parish residents, and others for stewardship of this vital resource. In 2014, about 5.43 million gallons per...

Murphy, Chid J.; White, Vincent E.
Murphy, C.J., and White, V.E., 2021, Water resources of Grant Parish, Louisiana: U.S. Geological Survey Fact Sheet 2020–3064, 6 p., https://doi.org/10.3133/fs20203064.

Publication Thumbnail
Year Published: 2021

Increasing hydroperiod in a karst-depression wetland based on 165 years of simulated daily water levels

The hydrology of seasonally inundated depression wetlands can be highly sensitive to climatic fluctuations. Hydroperiod—the number of days per year that a wetland is inundated—is often of primary ecological importance in these systems and can vary interannually depending on climate conditions. In this study we re-examined an existing hydrologic...

Cartwright, Jennifer M.; Wolfe, William J.

Publication Thumbnail
Year Published: 2021

Airborne geophysical surveys of the lower Mississippi Valley demonstrate system-scale mapping of subsurface architecture

The Mississippi Alluvial Plain hosts one of the most prolific shallow aquifer systems in the United States but is experiencing chronic groundwater decline. The Reelfoot rift and New Madrid seismic zone underlie the region and represent an important and poorly understood seismic hazard. Despite its societal and economic importance, the shallow...

Minsley, Burke J; Rigby, James Robert; James, Stephanie R.; Burton, Bethany L.; Knierim, Katherine J.; Pace, Michael; Bedrosian, Paul A.; Kress, Wade