• Atlas of
  Texas Surface Waters
• GIS Data Sets
• Hydrography Maps
• Edwards Aquifer Data Viewer

---

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 top

---

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.

• Texas Ecoregions - Maps and Data
• Texas Stream Segments, 2000
• Spatial Data

Return to top

---

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

Return to top

---

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.

• Edwards Aquifer Data Viewer

Return to top