Hydrology

This category represents surface and sub-surface water information for Mississippi.

This data is included in the standard county data release; however, data in that section may be legacy and may not necessarily be updated with the latest version.
Detailed Coastline
MS NPDES (Discharge Elimination Sites)
2022
Flood Hazard - Statewide
FEMA Flood DFIRM by County
Hydrologic Units (Basin)
Intermittent Streams
Major Rivers 100K
Mississippi River
2022
MS Dept. of Health Wells
MS Land & Water Resource Permit Wells
National Wetlands Inventory
NHD High-Res Flowlines
County
2022
NHD High-Res Other Areas
County
2022
NHD High-Res Water Bodies
County
2022
Perennial Streams
Source Water Protection Areas
Water Development Districts
Watersheds (12 digit)