Welcome to Region 4: The Mississippi Basin
USGS science throughout Mississippi, Louisiana, Arkansas, Missouri, and Iowa
Catching the Invasive Carp
USGS is working with partner agencies to develop and evaluate new methods for capturing bigheaded carps throughout the region
Louisiana's Coastal Wetlands in Peril
USGS analyzes land area change over time in one of the Nation's most critically threatened environments
Region 4: Mississippi Basin
Welcome to the Mississippi Basin Region! Our streamgage network is used to monitor and assess water resources across the region. Other research focuses on fisheries and aquatic ecosystems, midcontinental plant/animal species, invasive species, wildlife disease, and energy and mining.