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Maps & GIS

illustrated map of aquifer

Edwards Aquifer Maps and GIS Library

Located in the heart of south central Texas, the Edwards Aquifer is the natural water resource that supports approximately 2 million of us. It is part of a much larger system that spans approximately 8,800 square miles.

The Edwards Aquifer Authority manages the San Antonio segment of the Balcones Fault Zone. This area covers all or parts of eight counties including Uvalde, Medina, Atascosa, Bexar, Comal, Guadalupe, Hays, and Caldwell Counties.

Online Mapping Tool Instructions

The following tips will assist in using the online mapping tool available by clicking on the “View Web Map and Map My Location” buttons in each expandable section below.

  • Enter places and addresses in the search bar at the upper right of the screen. (This is a global search so don’t stop typing at the street, include the city too.)
  • Choose the correct address to zoom there.
  • Click next to the marker to see a pop-up of information about all the intersecting features in that location.
  • Click on any feature to see a pop-up of information about it. Click the blue arrow to see information about other features in that location.
  • Change the background from topographic to streets or aerial by clicking on ‘Basemap’ in the upper left.
  • Click ‘Legend’ in the upper left to view the symbols representing features on the map.
  • Click ‘Layers’ in the upper left to access options such as turning on and off layers.
  • Click ‘Details’ in the upper left to display instructions.
  • Click ‘Share’ in the upper center-right to share map on social media or to get a link to share.
  • Pan and zoom with the mouse buttons and using the + and – signs, then return to default view by clicking the house (home) symbol between the + and -.
  • On GPS-enabled mobile devices, click the crosshair symbol under the – sign to zoom to current location.

Featured Maps

Recharge Zones

PDF Maps

Edwards Aquifer System Map
Letter Size |  Wall Map  |  PowerPoint Slide

General Aquifer Flowpath Map
Wall Map


Shapefiles

Aquifer Zones

View Web Map and Map My Location

EAA Sub-chapter 713 Regulated Zones

PDF Files

Chapter 713 Edwards Aquifer System Map
Letter Size  |  Wall Map |  PowerPoint Slide

Subchapter E: Spill Reporting and Subchapter F: Regulated Substances Registration, Storage, and Planning
Letter Size  |  Wall Map |  PowerPoint Slide

Subchapter G: Aboveground and Underground Storage Tanks
Letter Size  |  Wall Map |  PowerPoint Slide

Subchapter H: Prohibitions on Coal Tar
Letter Size  |  Wall Map |  PowerPoint Slide


Shape Files

Aquifer Zones
BSEACD with Annex Area
Coal Tar Ban Area
Spill Reporting & Regulated Substances
Storage Tank Regulations

View Web Map & Map My Location

EAA and Surrounding Groundwater Conservation Districts

Shape Files

BSEACD with Annex Area
HTGCD
PCCD

View Web Map & Map My Location

EAA Sub-chapter 713 Regulated Zones

PDF Files

District 01
Wall Map

District 02
Wall Map

District 03
Wall Map

District 04
Wall Map

District 05
Wall Map

District 06
Wall Map

District 07
Wall Map

District 08
Wall Map

District 09
Wall Map

District 10
Wall Map

District 11
Wall Map

District 12
Wall Map

District 13
Wall Map

District 14
Wall Map

District 15
Wall Map

EAA Director Districts
Wall Map


Shape Files

Director Districts

View Mapping App & Map My Location

EAA Weather Stations Map

View Map & Access HOBO Data

Karst Connections: A Virtual Field Experience

Experience Karst Connections

Habitat Conservation Plan (HCP)

PDF Files

Comal HCP Final Sample Locations
Wall Map

San Marcos HCP Final Sample Locations
Wall Map