Hydrography Maps and Data
Links to the Atlas of Texas Surface Waters, data for Level 4 ecoregions and other hydrology data layers for use in ArcGIS. Statewide hydrography maps, and map-based viewers for surface water information.
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Atlas of Texas Surface Waters, GI-316
The Atlas depicts the state's classified surface waters, including streams, lakes, bays, and estuaries. The classified segments were established by the TCEQ in the Texas Surface Water Quality Standards.
- Statewide GIS data files
- Electronic version of printed publication
Order printed copies by phone, fax, or mail. Be sure to reference publication number GI-316.
Return to topGIS 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.
- Texas Ecoregions - Maps and Data
- 2008Segments and Impairments (ZIP archives).
These layers are not certified. Please see the disclaimer available in the same directory with the ZIP archives. There is one layer for streams (lines) and one for lakes and bays (polygons). Impairment information is associated with each segment under SEGID in the attribute table. - Texas Stream Segments, 2000
- Spatial Data
Hydrography Maps
Maps in PDF format; some file sizes are large (more than 5 MB) and are therefore slow to download. (Help with PDF.)
- Texas Classified River Basins (11.3 MB)
- Impaired Segments, 2000 Texas 303(d) List (7.4 MB)
- Assessed Segments, 2000 Water Quality Inventory (7.8 MB)
- TMDL Projects, 2005 - 2007
- TMDL Projects by Region
- Bacteria-Related Impairments on the 303(d) List for 2004
Edwards Aquifer Data Viewer
The Viewer displays about the location of the Edwards Aquifer recharge and contributing zones through a map-based user interface. Please note: You may wish to open a new window or tab to use the Viewer, since the "back" button on the Viewer window will not return you to this page.
