Texas Well Atlas open data

Every table behind the underground part of the Texas Well Atlas can be downloaded as CSV, free, under CC BY 4.0. They are rebuilt with each site update from TWDB driller reports (state file of November 10, 2026). They carry no owner or driller names and no individual wells: they are summaries by place. The well by well file (locations generalized to about 1.5 km) is archived on Zenodo with a permanent DOI: https://doi.org/10.5281/zenodo.24126380.

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

Files

File	What it holds	Rows	Size
texas-water-well-depth-by-place.csv	One row per Texas city, town or community with at least 10 home wells inside its limits or within 2 miles: depth percentiles, water level, yield, 20-year change, main formation and cost estimate.	1,204	318 KB
texas-water-well-depth-by-groundwater-district.csv	One row per groundwater conservation district (TWDB boundaries current as of November 2019).	101	37 KB
texas-water-well-depth-by-formation.csv	One row per layer group of the state's models: depth of the home wells that draw from it.	16	4 KB
texas-water-well-depth-by-county-and-formation.csv	One row per county and layer group with at least 10 home wells.	290	67 KB
texas-county-underground-summary.csv	One row per county covered by a state layered model: median depth, main formation and model coverage.	141	22 KB
texas-underground-report-2026.csv	The table of the 2026 report, with its one-line summary per county.	141	44 KB

UTF-8, comma separated, one header row. Empty cells mean there are not enough wells to give the figure.

License and citation

Licensed under Creative Commons Attribution 4.0 (CC BY 4.0): you may copy, publish and transform the data, commercially too, as long as you credit the source and link to this page.

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/data. License CC BY 4.0. https://doi.org/10.5281/zenodo.24126380.

DOI: 10.5281/zenodo.24126380

The source data is public: the driller reports and aquifer models belong to the Texas Water Development Board (TWDB), and the place boundaries to the U.S. Census Bureau.

Sources

How they are made

We count new and replacement domestic (home) wells with a valid depth on their report. 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.

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

Data dictionary

Column	Meaning
`key / slug`	Stable identifier of the row; it is also the last part of the page URL.
`wells_used`	Home (domestic) wells with a valid depth behind the figures of the row.
`period`	last10 = wells of the last 10 years (used when there are at least 30); all = every well since 2001.
`confidence`	standard = 30 wells or more; limited = 10 to 29. Rows under 10 wells are not published.
`depth_p10_ft … depth_p90_ft`	Percentiles of well depth in feet. depth_median_ft is the 50th percentile; p25 to p75 is the middle half.
`water_level_median_ft, water_level_wells`	Median static water level in feet below ground, measured by the driller when the well was finished, and the wells that have it. Empty under 10 wells.
`yield_median_gpm, yield_wells`	Median yield in gallons per minute from the report's test, and the wells that have it. Empty under 10 wells.
`median_early_ft, median_late_ft, change_pct, trend`	Median depth in 2003 to 2007 and in 2021 to 2025, the change, and the result: deeper, shallower, no_clear_change or not_comparable (fewer than 30 wells in either period).
`model`	TWDB groundwater availability model used for the layers: trnt_h (Hill Country Trinity, 1 mile cells), trnt_n (Northern Trinity and Woodbine, quarter mile cells), glfc_n (northern Gulf Coast Aquifer, cells of about 0.62 mile) or hpas (High Plains Aquifer System, half mile cells read on a grid of about 1.2 by 1.4 miles). Empty where no processed model covers the row.
`top_formation, top_formation_share_pct`	Layer group the largest share of wells draws from, and that share. An estimate from the state's regional model, not a survey. In the High Plains model, "Dockum Group" means at or just below the base of the Ogallala, in the top of the Dockum, and the Edwards-Trinity group is the Cretaceous rock under the Ogallala (named by its local aquifer on the pages).
`formation_wells, model_coverage_pct, interval_pct`	Wells the model covers, their share of wells_used, and the share whose report gives the interval where water enters (the rest use the bottom of the hole).
`antlers`	true where the state maps the Trinity as one undivided unit (Antlers Formation); the split between layers is approximate there.
`share_of_county_pct`	In the county and formation table: share of the county's model-covered wells that draw from that layer.
`cost_low_usd, cost_high_usd`	TerraFunded's estimate for a complete home well at the median depth, from published Texas prices. Not a quote.
`lat, lon`	Center of the place or district (decimal degrees, WGS84).
`data_as_of, url`	Date of the state file behind the row, and the page that explains it.