​The Comal Trinity Groundwater Conservation District (CTGCD) was created to help Comal County residents conserve, preserve, recharge, protect, and prevent waste of groundwater from the Trinity Aquifer which underlies all of Comal County.  The Comal Trinity GCD was created during  the 2015 84th Texas Legislature with the enrollment of House Bill 2407 and became effective 17 June 2015. The bill provides the GCD the authority to issue bonds; and impose assessments, fees, or surcharges.

Announcements and Public Notices

CTGCD Regular Board meeting will be held Monday, September 19, 2022. Time, location and details to be updated soon. The Comal Trinity Groundwater Conservation District invites the public to attend. Please contact District Staff at 830-885-2130 with any questions. An Agenda and meeting documents will be posted at least 72 hours prior to the meeting.

Groundwater Management Area 9

Planning meeting date changed to Tuesday June 21, 2022 at 10:00 a.m. at Cow Creek Groundwater Conservation District office, 9 Toepperwein Rd., Boerne TX 78006. Agenda may be found here and on the Public Notices page. 

Groundwater Management Area 10

Next meeting is scheduled for Wednesday, May 25, 2022 at 11:30 a.m. at the Edwards Aquifer Authority building, 900 E. Quincy, San Antonio, Texas 78215.  Click here for the agenda.

What rules are now in place regarding my current well or a well I am planning to drill?
The Comal Trinity GCD rules became effective  January 1, 2019.  All BORINGS into the Trinity group of aquifers in Comal county must be done in accordance with Rules discussed in public hearings and adopted by the Board.  These regulations along with adoption dates, may be found by clicking on RULES in the horizontal menu above, between District and District Forms. 
What fees are imposed by Comal Trinity GCD?

Fees for non-exempt well users were established as of December 21, 2015 and became effective January 1, 2016. Please visit Chapter 11. Fees for additional information.

Will you require a well meter?

Non-exempt wells are required to have wells metered no later than August 17, 2018. Domestic and livestock wells are not required to have meters installed.


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Surface Water Groundwater Interaction and Water Quality Of The Guadalupe River Basin And The Trinity Aquifer In Western Comal County, Texas Applied Karst Hydrogeology

Project Report December 9, 2019

To view the report Click Here

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Planning for Texas’ groundwater resources

(Texas Water Development Board May 28, 2020)