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By subscribing, you agree to receive The Comal Daily and to our Terms and Privacy Policy. Unsubscribe anytime.
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The Comal Daily

Comal County, before your second cup.

Comal County news every morning, with links to the original sources.

By subscribing, you agree to receive The Comal Daily and to our Terms and Privacy Policy. Unsubscribe anytime.
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The Comal Daily

Comal County, before your second cup.

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Comal County news deskLocal reporting, every day

Who regulates Comal County water wells and Canyon Reservoir?

For Comal County well owners and water customers, the first step depends on the water source: Edwards, Trinity or Canyon Reservoir.

Listen to this articleComal.News narrated edition
Ready · 0:00 / 5:15
Stylized cross section of two wells extending into blue underground water layers, with a reservoir, dam slope, shrubs, and hills above.
Illustration: Wells reach underground water layers beside a reservoir.Original editorial illustration; not a photograph and does not depict the reported event or an exact property.Comal.News Visual Desk · Original illustration · Source ↗ · Comal.News original illustration ↗

The Edwards Aquifer Authority handles Edwards Aquifer wells within its jurisdiction, the Comal Trinity Groundwater Conservation District sets rules for Trinity aquifer borings in Comal County, and the Guadalupe-Blanco River Authority manages Canyon Reservoir's stored water.

Start by identifying whether your question concerns an Edwards well, a Trinity well or boring, or water stored in the reservoir. The agencies describe different responsibilities on their Edwards Aquifer Authority regulatory page, Comal Trinity district page and GBRA reservoir page.

From the source record

Official agency guideComal Trinity Groundwater Conservation District rules
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.
Comal Trinity Groundwater Conservation District ↗
The district's official page describes its rules for Trinity aquifer borings in Comal County.

A Comal County resident's starting point for a well permit or drought question depends on the water source and the property's jurisdiction; Canyon Reservoir's flood-control pool is managed separately by the U.S. Army Corps of Engineers. A reservoir question can also require distinguishing stored water from flood control. The table shows what each agency says it handles and where to begin.

Officially described water responsibilities and starting points for Comal County residents
AgencyWater source or areaWhat it handlesWhere residents start
Edwards Aquifer AuthorityEdwards Aquifer wells within EAA jurisdictionWell registration; construction, plugging and capping permits; regulated pumpingExternal and Regulatory Affairs: ERA@edwardsaquifer.org or (210) 222-2204
Comal Trinity Groundwater Conservation DistrictBorings into the Trinity group of aquifers in Comal CountyDistrict rules for borings and wells; rules and fees for non-exempt usersDistrict rules and public notices at comaltrinitygcd.com; staff: 830-885-2130
Guadalupe-Blanco River AuthorityStored water in Canyon Reservoir's conservation poolStorage and delivery of reservoir water for supply under its permitsGBRA's Canyon Reservoir operations page at gbra.org

The U.S. Army Corps of Engineers manages the separate flood-control pool at Canyon Reservoir, according to GBRA.

If you have an Edwards well

The Edwards Aquifer Authority says its Groundwater Regulation staff check wells within EAA jurisdiction, maintain a well database and administer permits for wells drilled into or through the Edwards Aquifer. Its External and Regulatory Affairs division also manages production through permitting, metering and drought management. For a well or withdrawal question, contact that division at ERA@edwardsaquifer.org or (210) 222-2204. For critical-period questions, it lists a separate support number: (210) 477-1883. Its regulatory page describes the programs and contact points.

If you plan a Trinity boring

The Comal Trinity Groundwater Conservation District says all borings into the Trinity group of aquifers in Comal County must follow its adopted rules, which took effect January 1, 2019. Its homepage points readers to the district's Rules menu for the regulations and adoption dates. It also directs non-exempt well users to Chapter 11 for fee information. Before drilling or changing a well, check the district's current rules and ask staff how they apply to the proposed work. The district lists 830-885-2130 for questions on its official homepage.

If your question is about Canyon Reservoir

GBRA says it holds the right to store water in Canyon Reservoir's conservation pool for water supply and deliver it to customers under its permits. It describes releases from that pool as depending on factors that include inflows, water rights, customer contracts and environmental flow requirements. The U.S. Army Corps of Engineers manages the separate flood-control pool and floodwater releases. For reservoir operations, start with GBRA's Canyon Reservoir page; it also identifies the Water-Oriented Recreation District of Comal County as a resource for release and river-condition information.

Check the source before applying a rule

The agency descriptions do not identify the aquifer serving an individual parcel or establish that every Comal County property falls under the same well rules. If the source of a proposed well is uncertain, give the property's location and proposed work to the agency before relying on a permit or drought requirement. For Edwards wells, use the EAA contacts above; for a Trinity boring in Comal County, use the district's rules and staff number. For stored reservoir water, consult GBRA's operations page. Those official starting points provide the next record or office to check for a property-specific answer.

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