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Water wells in the Brazos Valley Groundwater Conservation District

Home water wells inside the Brazos Valley Groundwater Conservation District (Robertson and Brazos counties, Texas) are typically 312 to 500 feet deep (median 410 ft, 609 wells drilled in the last 10 years). The state's model covers only 4% of these wells (23); among those, 65% draw from younger formations above the Woodbine, and 22% end near or below the base of the Gulf Coast Aquifer, according to the state's Northern Trinity and Woodbine model and the northern Gulf Coast Aquifer model (TWDB). Over the last three full years drillers reported about 72 new home wells a year; the peak was 89 in 2022. Estimated cost of a complete well at the median depth: $13,000 to $31,000.

Updated every day from Texas Water Development Board driller reports. Last update: November 11, 2026, using the state file of November 10, 2026.

See the wells and layers at an exact point
Map of the Brazos Valley Groundwater Conservation DistrictDistrict boundary (Robertson and Brazos counties) with the places that have the most home wells.Kurten: 435 ftKurtenBryan: 360 ftBryanCollege Station: 340 ftCollege StationLake Bryan: 368 ftLake BryanCalvert: 365 ftCalvertFranklin: 488 ftWixon Valley: 416 ftHearne: 560 ftHearne25 miles

Under the center of the Brazos Valley GCD

District boundary from TWDB's file current as of November 2019. Later changes are not shown.

Home wells in and around the Brazos Valley GCD

Each dot is a home well from a state driller report, colored by depth. Tap one for its details and official report. Tap an empty spot to see what is under that point.

See underground

Well depth (ft)

  • <100
  • 100
  • 200
  • 300
  • 400
  • 600
  • 800+

Dark line: the district boundary (TWDB, 2019)

Key figures

Typical depth (middle half)
312 to 500 feet
Median depth
410 feet
Deepest 10% are past
590 feet
Water level (median)
98 feet
584 wells
Yield (median)
30 gpm
577 wells, gallons per minute
Wells used
609
In the last 10 years
Counties
2
All years on file
1,444
median 400 ft, since 2002
Confidence
Standard (30 or more wells)

When the wells were finished, the water stood a median 98 feet below the surface (584 wells), well above the bottom: the typical well holds about 312 feet of water.

Map of the Brazos Valley Groundwater Conservation DistrictDistrict boundary (Robertson and Brazos counties) with the places that have the most home wells.Kurten: 435 ftKurtenBryan: 360 ftBryanCollege Station: 340 ftCollege StationLake Bryan: 368 ftLake BryanCalvert: 365 ftCalvertFranklin: 488 ftWixon Valley: 416 ftHearne: 560 ftHearne25 miles
District boundary from TWDB's file current as of November 2019. Later changes are not shown.

New home wells per year

Over the last three full years drillers reported about 72 new home wells a year; the peak was 89 in 2022.

Home wells reported per year in the Brazos Valley GCDFrom 2002 to 2026. The table below has every year.02550751002002: 162003: 692004: 6520042005: 812006: 522007: 562008: 7020082009: 622010: 412011: 692012: 5420122013: 642014: 672015: 282016: 4220162017: 532018: 442019: 452020: 5720202021: 582022: 892023: 892024: 7220242025: 562026: 45
Domestic wells with a depth, by the year they were finished. 2026 is still in progress.
Show the data table
YearWells
200216
200369
200465
200581
200652
200756
200870
200962
201041
201169
201254
201364
201467
201528
201642
201753
201844
201945
202057
202158
202289
202389
202472
202556
202645

Which formation the wells draw from

The state's model covers only 4% of these wells (23); among those, 65% draw from younger formations above the Woodbine, and 22% end near or below the base of the Gulf Coast Aquifer, according to the state's Northern Trinity and Woodbine model and the northern Gulf Coast Aquifer model (TWDB).

Layer (state's model)ShareWellsTypical depth (ft)
Above the Woodbine65%1565–270
Near or below the base of the Gulf Coast Aquifer22%5270–345
Jasper, Catahoula and Burkeville13%3—

For 100% of these wells the report says where the water enters (the screen or the open hole), and we use the middle of that interval.

Places with the most wells in the district

PlaceMedian depth (ft)Middle half (ft)WellsMain layer
Kurten435350–51271—
Bryan360292–46063—
College Station340220–44255—
Lake Bryan368295–58134—
Calvert365268–48832—
Franklin488385–61130—
Wixon Valley416356–50730—
Hearne560401–76026—
Bremond275220–42025—

Counties

Depth over time

Home well depth in the district has not changed meaningfully in 20 years: the median was 400 feet in 2003 to 2007 and 420 feet in 2021 to 2025 (a difference under 10% or within the margin of error).

PeriodMedian depth (ft)Wells
2001–2005407231
2006–2010400281
2011–2015374282
2016–2020380241
2021–2025420364
202638045

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Common questions

How deep are wells in the Brazos Valley GCD?

Home water wells inside the Brazos Valley Groundwater Conservation District (Robertson and Brazos counties, Texas) are typically 312 to 500 feet deep (median 410 ft, 609 wells drilled in the last 10 years).

Which formation do wells in the district draw from?

The state's model covers only 4% of these wells (23); among those, 65% draw from younger formations above the Woodbine, and 22% end near or below the base of the Gulf Coast Aquifer, according to the state's Northern Trinity and Woodbine model and the northern Gulf Coast Aquifer model (TWDB).

What does a groundwater conservation district do?

In Texas, districts are the local authority over groundwater: they can require registration or permits for new wells, set spacing from other wells and property lines, and limit pumping. Each district writes its own rules, so ask the Brazos Valley Groundwater Conservation District before drilling inside it.

What a well costs here

At the median depth for the district (410 feet), a complete home well would cost roughly $13,000 to $31,000: $25 to $60 per foot for drilling, casing and seal, plus $2,500 to $6,500 for the pump, pressure tank, controls and hookup at the well. Across the whole middle half of depths (312 to 500 feet) the range runs from $10,500 to $36,500. This is TerraFunded's estimate from published Texas prices, not a quote, and it leaves out trenching and the line to the house. Get prices from at least two licensed drillers.

How these numbers are made

We count new and replacement domestic (home) wells whose coordinates fall inside the district boundary. We use the last 10 years when there are at least 30 wells; otherwise all since 2001. The median is the middle well and the middle half runs from the 25th to the 75th percentile.

To tell which layer a well draws from, we take the ground elevation at its location, subtract the depth of the interval where water enters (or the bottom of the hole when the report does not give one) and see which layer of the state's model that point falls in.

For 100% of these wells the report says where the water enters (the screen or the open hole), and we use the middle of that interval.

How well it works: In 7,977 wells in the area of the state's Northern Trinity and Woodbine model (North and Central Texas) where the State of Texas recorded the aquifer, our estimate of the formation the well draws from names the same layer of the state's model in about 74% of them, and that layer or the one next to it in at least 95%; among the 3,130 of those wells that the state places in a Trinity layer (Paluxy to Hosston) it is about 56%.

  • The layers come from the Texas Water Development Board's Northern Trinity and Woodbine model, with quarter mile cells, summarized here to about 1.3 miles. It is a regional model, not a survey of any lot: between one model point and the next, the real depth of each layer can differ.
  • In this model every layer is at least 30 feet thick, even where the real rock is thinner or missing. Thin layers and the edges of the model are approximate.
  • Inside the Trinity this atlas does not name single model layers: it groups the Paluxy and Glen Rose (upper Trinity) and groups the Hensell, Pearsall and Hosston (lower Trinity, Twin Mountains and Travis Peak), because the check against the state's codes shows the method cannot separate them reliably.
  • "Near or below the base of the Trinity" means the well reaches the bottom of the model or passes it, often by tens of feet. Older rock that the model does not include may lie there.
  • We never use the model's water levels. The water level on this page is the one each driller measured when the well was finished.

These are depths of real wells drilled nearby, not a promise about any property. Groundwater can change over short distances and with drought. A licensed water well driller can tell you what to expect on a specific tract.

Read the full methodology · Download the data (CSV, CC BY 4.0)

How to cite

TerraFunded (2026). Texas Well Atlas: Underground. From Texas Water Development Board driller reports and groundwater availability models (data as of November 10, 2026). https://terrafunded.com/wells/districts/brazos-valley-groundwater-conservation-district. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

Sources