Water Well Drilling & Pump Repair in Colleyville, TX | DFW Well Service
Service Area Overview
Licensed well drilling and pump service in Colleyville and northeast Tarrant County, reaching the deep, confined Trinity where a private well is the exception.
Services We Provide in Colleyville
DFW Well Service (TDLR License #61234 DKMPW) provides full-service water well solutions in Colleyville and across northeast Tarrant County. Our licensed team handles everything from new well drilling to routine pump maintenance for the estate lots and outlying properties where private wells are still in use.
Well Depth & Geology in Colleyville Area
Tap any layer in the cube — or in the list below — to see what it is and what it means for drilling a well here.
- Topsoil — Blackland Prairie / urban context0–10 ft
- Austin Chalk10–250 ft
- Eagle Ford Shale250–300 ft
- Paluxy Formation300–600 ft
- Glen Rose Formation600–800 ft
This cross-section shows the layer stack typical of Tarrant County. The exact formations and depths under a specific Colleyville-area property vary — see the details above.
- Primary Aquifer
- Trinity (Paluxy / Twin Mountains, separated by Glen Rose confining unit)
- Typical Well Depth
- Varies by location
- Groundwater District
- Northern Trinity GCD
- Confinement
- deep confined across most of Tarrant County; limited Trinity outcrop in the far northwestern corner
Secondary: Woodbine (eastern Tarrant County only)
We estimate from nearby well records
Tarrant County overview → Permit & regulations → TDLR License #61234 DKMPW Updated August 6, 2026
Colleyville sits in northeast Tarrant County, between Grapevine and Southlake, and is one of the most fully built-out suburbs in the area. Nearly every home is on municipal water; the private wells that remain are on larger estate lots or serve irrigation. It is worth being clear about the geology: the limited Trinity outcrop in Tarrant County is confined to the far northwestern corner, and here on the eastern side of the county the Trinity is deep and confined — among the deepest anywhere in Tarrant.
Wells here target the Trinity aquifer. Up high is the Paluxy Formation, a sand-dominant unit that lies at or near the surface only in the far northwest corner and deepens toward the east — countywide the Paluxy runs from surface to roughly 1,000 feet. Beneath it, separated by the Glen Rose limestone — which acts as a confining layer here, not a producer — are the Twin Mountains sands, the most productive Trinity unit, sitting roughly 500 to 2,000 feet and also deepening eastward. A minor Woodbine aquifer is present in the eastern Tarrant suburbs and supplies some household and livestock water, but its yields are lower and its water poorer than the Trinity.
Tarrant County Permit Requirements
Water wells in Colleyville and Tarrant County fall under the Northern Trinity Groundwater Conservation District (NTGCD), a single-county district created in 2007. A typical domestic household well — one not capable of producing more than 17.36 gallons per minute and used for household, livestock, or agricultural purposes — is exempt from permitting, metering, and production fees. Even so, every well drilled in the county must still be registered with the district. Larger, non-exempt wells require a permit before drilling. Our guide to Tarrant County water well regulations walks through the full process.
DFW Well Service handles the NTGCD registration and any permitting as part of your project. Call (940) 536-8560 for a free estimate on a new well or any pump and service work in Colleyville or anywhere in Tarrant County.