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

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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: February 5, 2019

POSTPONED due to weather: Ask Questions and Learn More About the Low-Level Helicopter Flying Above the Mississippi Alluvial Plain

Media:            Please join the U.S. Geological Survey, CGG Airborne and various partners for a demonstration of the low-flying helicopter and description of what scientists are seeking in and around the Mississippi Alluvial Plain.

Date published: December 13, 2018

Seeking Water from Above: Low-Level Helicopter to Fly Southern Portion of Mississippi Alluvial Plain

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.  


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Year Published: 2020

Water resources of Union Parish, Louisiana

Information concerning the availability, use, and quality of water in Union 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 4.88 million gallons per day...

Robinson, Angela L.
Robinson, A.L., 2020, Water resources of Union Parish, Louisiana: U.S. Geological Survey Fact Sheet 2020–3002, 6 p., https://doi.org/10.3133/fs20203002.

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Year Published: 2020

Changing suspended sediment in United States rivers and streams: Linking sediment trends to changes in land use/cover, hydrology and climate

Sediment is one of the leading pollutants in rivers and streams across the United States (US) and the world. Between 1992 and 2012, concentrations of annual mean suspended sediment decreased at over half of the 137 stream sites assessed across the contiguous US. Increases occurred at less than 25 % of the sites, and the direction of change was...

Murphy, Jennifer C.

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Year Published: 2020

Assessing water-quality changes in agricultural drainages: Examples from oxbow lake tributaries in Mississippi, USA and simulation-based power analyses

Hydrology and water quality (suspended sediment, total nitrogen, ammonia, total Kjeldahl nitrogen, nitrate plus nitrite, and total phosphorus (TP)) were monitored in two small agricultural drainages in northwestern Mississippi to document changes in water quality that coincided with the implementation of BMPs in upstream drainages. Using an event-...

Murphy, Jennifer C.; Hicks, Matthew B.; Stocks, Shane J.