DATE: September 9, 2025
LOCATION: 9 TOEPPERWEIN ROAD, BOERNE, TX 78006
TIME: 10:00 A.M.

What is a Groundwater Management Area?

Groundwater Management Areas (GMA) were created in order to provide a balance between the highest practicable level of groundwater production and the conservation, preservation, protection, recharging, and prevention of waste of the groundwater, and of groundwater reservoirs or their subdivisions, and to control subsidence caused by withdrawal of water from those groundwater reservoirs or their subdivisions, consistent with the objectives of Chapter 36 Texas Water Code.

The initial Groundwater Management Area delineations were adopted on December 15, 2002, and are modified as necessary according to agency rules. There are 16 groundwater management areas in Texas. All groundwater conservation districts are part of at least one groundwater management area. 

For more information please visit the GMA 9 website.

Groundwater Management Area 9 (GMA 9) Currently includes the following Districts:

• Bandera County River Authority and Ground Water District
• Blanco-Pedernales Groundwater Conservation District
• Comal Trinity Groundwater Conservation District
• Cow Creek Groundwater Conservation District
• Hays Trinity Groundwater Conservation District
• Headwaters Groundwater Conservation District
• Medina County Groundwater Conservation District
• Southwestern Travis County Groundwater Conservation District
• Trinity-Glen Rose Groundwater Conservation District

GMA 9 2021 Explanatory Report

How is Blanco County Doing?

The chart below shows the actual water levels taken from several monitor well across Blanco County dating back to 2008, which is the baseline year GMA 9 designated for regional planning. The average change in Water Levels in Blanco County Trinity Aquifer Monitor Well is a positive 9ft, meaning there has been more recharge to the Trinity aquifer in Blanco County than loss of water. 

For more GMA information please visit the Texas Water Development Boards website.