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Hydrography Data and Map-Based Data Viewers

Statewide map-based viewers for surface water information. Links to data for stream segments, Level 4 ecoregions, and other data layers for use in ArcGIS.
map of Texas river basins

Data Viewers

Viewers use a map-based user interface to give access to data. These pages are sometimes slow to load.

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GIS Data Sets

Data layers for use in ArcGIS. Includes data such as stream, lake, and bay segments; permitted wastewater outfalls; regulatory boundaries; and land use. Some file sizes are large and therefore may be slow to download or may "timeout" before download is complete.

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