GIS Data

All GIS datasets are available for download in shapefile format.  All datasets are in DD NAD 83.  Please click a data category below to open or right click to save the datasets to your desktop.  To preview the data, please click the thumbnail for a larger image.  All shapefiles are zipped.

Note: For Lake Contour Data or Bathymetric Data, please refer to the Hydrographic Surveys.

Natural Features

The GIS datasets listed below are related to various types of natural features.  Although TWDB utilizes this data in our most commonly used maps, some of the datasets were created and are maintained by other state and federal agencies.

Major Aquifers - The 9 major aquifers of Texas as defined by the TWDB, Updated December 2006.

Major Aquifers Shapefile

Minor Aquifers - The 21 minor aquifers of Texas as defined by the TWDB, Updated December 2006.

Minor Aquifers Shapefile

Major River Basins - The 23 major U.S.G.S. river basins of Texas, * These are not the 'official' TWDB basin boundaries.

River Basins Shapefile

Hydrologic Unit Code - HUC - Based on the USGS national hydrologic 8-digit coding system. Technically considered 'sub-basins'. Data current as of 2014.

HUC Shapefile

Existing Reservoirs - Existing reservoir boundaries reflecting the 2012 State Water Plan, Updated November 2014.

Existing Reservoirs Shapefile

Texas Precipitation - Average monthly and annual precipitation for the climatological period 1981-2010. Data is from NRCS.

Precipitation Shapefile

Major Rivers - Data extracted from NHD, 1:100,000 layer, Oct. 2009

Major Rivers Shapefile

Texas Hillshade - Background image used in statewide maps, Generated from DEMs.

Texas Hillshade Shapefile

Texas Terrain Color Ramp - Texas hillshade raster plus color ramp.

Texas Terrain Shapefile

Well Locations from TWDB Groundwater Database (GWDB) - Updated November 2014.

GWDB Well Location Shapefile

Well Locations from TWDB Submitted Driller's Reports Database (SDRDB) - Updated November 2014.

SDRDB Well Location Shapefile

Administrative Boundaries

Boundaries for various administrative units including: Regional Water Planning Areas and Groundwater Conservation Districts are approximate and may not accurately depict legal descriptions.

Groundwater Conservation Districts - Groundwater conservation districts in Texas. The original data was acquired from TCEQ. Dataset current as of August 2014.

GCD Shapefile

River Authorities and Special Law Districts - Statutory boundaries (but not necessarily the service areas). Data current as of 2014.

RASL Shapefile

Groundwater Management Areas - GMAs - Groundwater Managment Area boundaries, approved December 2011.

GMA Shapefile

Priority Groundwater Management Areas - PGMA - Updated Oct. 2009, as designated by TCEQ.

PGMA Shapefile

PFCA Regions and Field Office - Geographic area assignments for Regional Project Teams and Inspection & Field Support Services Offices.

PFCA Regions Shapefile

Regional Water Planning Areas - The 16 Water Planning Regions in Texas, as created by TWDB, updated November 2014.

RWPA Shapefile

TWDB Well Location Grid

Well Location Grid Shapefile