Planning a well in Hood County?
Water Well Drilling & Service in Hood County, Texas
Hood County sits over the Trinity (Paluxy / Glen Rose / Twin Mountains) aquifer system (outcrop / shallow confined). Most residential wells target the Paluxy Sand (upper Trinity); depth varies meaningfully across the county and is best estimated from neighboring TWDB well records. Drilling is regulated by the Upper Trinity GCD, which requires a pre-drilling permit.
What’s Under Hood County: a Layer-by-Layer Look
About this diagram
This cross-section shows the actual rock formations beneath Hood County, from topsoil down to the Trinity (Paluxy / Glen Rose / Twin Mountains) aquifer system.
Tap any layer in the image, or any layer in the list, to explore each layer and what it means for drilling a well on your property.
- Topsoil — Cross Timbers / Lampasas Cut Plain0–15 ft
- Comanche Peak / Walnut limestone15–80 ft
- Paluxy Formation80–250 ft
- Glen Rose Formation250–400 ft
- Twin Mountains Formation400–550 ft
Hood County stratigraphy — top to bottom
- Topsoil — Cross Timbers / Lampasas Cut Plain
- Thin rocky reddish-brown soil with cedar and limestone debris.
- Comanche Peak / Walnut limestone
- Thin tan limestone and marl cap above the Paluxy; low permeability and non-water-bearing — part of the confining cover the well passes through before reaching Trinity sand.
- Paluxy Formation
- Upper Trinity sand — fine to medium cross-bedded sand with silt and clay; small-to-moderate yields. A primary residential target across Hood County where it is reached above the Glen Rose (Trinity Paluxy / Glen Rose / Twin Mountains; UTGCD 2023 Management Plan).
- Glen Rose Formation
- Mostly limestone with shale and anhydrite, forming distinctive stepped ledges. It mainly acts as a confining layer — sealing water off — between the Paluxy and the Twin Mountains, though cracked zones give up a little.
- Twin Mountains Formation
- The most productive Trinity layer once a well reaches it. Wells usually finish in its lower part and draw moderate to large amounts of fresh to slightly salty water. The rock is mostly medium-to-coarse sand and conglomerate, with massive sand low down.
0–15 ft
15–80 ft
80–250 ft
250–400 ft
400–550 ft
Hood County stratigraphy — top to bottom
- Topsoil — Cross Timbers / Lampasas Cut Plain (0–15 ft)
- Thin rocky reddish-brown soil with cedar and limestone debris.
- Comanche Peak / Walnut limestone (15–80 ft)
- Thin tan limestone and marl cap above the Paluxy; low permeability and non-water-bearing — part of the confining cover the well passes through before reaching Trinity sand.
- Paluxy Formation (80–250 ft)
- Upper Trinity sand — fine to medium cross-bedded sand with silt and clay; small-to-moderate yields. A primary residential target across Hood County where it is reached above the Glen Rose (Trinity Paluxy / Glen Rose / Twin Mountains; UTGCD 2023 Management Plan).
- Glen Rose Formation (250–400 ft)
- Mostly limestone with shale and anhydrite, forming distinctive stepped ledges. It mainly acts as a confining layer — sealing water off — between the Paluxy and the Twin Mountains, though cracked zones give up a little.
- Twin Mountains Formation (400–550 ft)
- The most productive Trinity layer once a well reaches it. Wells usually finish in its lower part and draw moderate to large amounts of fresh to slightly salty water. The rock is mostly medium-to-coarse sand and conglomerate, with massive sand low down.
Hood County Quick Facts
- Primary Aquifer
- Trinity (Paluxy / Glen Rose / Twin Mountains)
- Typical Well Depth
- Varies by location
- Groundwater District
- Upper Trinity GCD
- Confinement
- outcrop / shallow confined
We estimate from nearby well records
Cities We Serve in Hood County
Cresson, TX
Licensed well drilling and pump service in Cresson — a tri-county area straddling Hood, Parker, and Johnson. Confirm your parcel's county before drilling.
View Cresson details →Granbury, TX
Licensed well drilling and pump service in Granbury and Hood County. Hard limestone Trinity geology — specialized equipment required.
View Granbury details →What's Under Hood County: the Geology Story
Drilling in Hood County means starting in topsoil, working through Brazos / Lake Granbury alluvium (localized), Paluxy Sand (upper Trinity), Glen Rose Formation, to reach the Twin Mountains Formation — the producing zone for most domestic wells.
The full layer-by-layer stratigraphy is laid out under the cube above. Well depth in Hood County varies by property location and overburden thickness; your driller can review TWDB records for neighboring wells to refine the expected completion zone before drilling.
Permits & Regulations in Hood County
Hood County wells are regulated by the Upper Trinity GCD. A pre-drilling permit is required before any new well is constructed. DFW Well Service submits the permit application as part of our drilling process.
Full Hood County permit & regulations →Frequently Asked Questions about Hood County Wells
What aquifer is under Hood County?
How deep are wells typically drilled in Hood County?
Does Hood County require a permit to drill a water well?
What's the main producing formation in Hood County?
Ready to drill or service a well in Hood County?
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