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Hydrography Maps and Data

Links to the Atlas of Texas Surface Waters, data for Level 4 ecoregions, GIS data for classified segments, and other hydrology data layers for use in ArcGIS. Statewide hydrography maps and map-based viewers for surface water information.

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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Atlas of Texas Surface Waters, GI-316

The Atlas depicts the state's classified surface waters, including streams, lakes, bays, and estuaries, as of 2000. The classified segments were established by the TCEQ in the Texas Surface Water Quality Standards.

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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 (more than 10 MB) and are therefore may be slow to download or may "timeout" before download is complete.

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Hydrography Maps

Maps in PDF or JPG; help downloading files. Large files (more than 5 MB) are slow to download.

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