Around Dallas-Fort Worth, home wells run from 55 feet in Dallas County to 1,020 in Collin

The Dallas-Fort Worth metropolitan area has 11 counties by the federal definition. Rockwall has too few home wells for a figure, so the table has 10 counties. Their home wells differ widely: the median runs from 55 feet in Dallas County to 1,020 feet in Collin County, across 15,169 wells. Parker County has the most wells (7,270). Compared with 2003 to 2007, new wells are at least 10% deeper in 1 of the 9 comparable counties, and the water stands lower in 3 of 9, most of all in Ellis County (110 feet lower).

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

Download the table (CSV)Sources and how to check it

The figures

Deepest county: Collin: 1,020 feet; 50 wells
Shallowest county: Dallas: 55 feet; 71 wells
Most wells: Parker: 7,270
Counties drilling deeper: 1 of 9
Counties with the water lower: 3 of 9

The 10 counties

Home wells, last 10 years, or since 2001 where few. The 20-year columns compare 2003 to 2007 with 2021 to 2025 where both periods have 30 wells. Tap a heading to sort.

County	Median (ft)	Middle half (ft)	Wells	Then → now (ft)	Change	Water level change (ft)
Collin	1,020	825–1,424	50	—	—	—
Denton	440	390–540	888	440 → 440	0% (No clear change)	+6
Ellis	420	300–760	157	402 → 440	+9% (No clear change)	+110
Johnson	400	240–514	1,110	400 → 400	0% (No clear change)	−55
Tarrant	340	260–400	1,714	340 → 360	+6% (No clear change)	+45
Parker	240	200–320	7,270	210 → 240	+14% (Deeper)	0
Wise	220	180–300	3,603	208 → 220	+6% (No clear change)	+5
Hunt	216	164–302	244	206 → 216	+5% (No clear change)	+25
Kaufman	100	64–120	62	105 → 106	+1% (No clear change)	−4
Dallas	55	39–90	71	55 → 55	0% (No clear change)	+3

What this shows and what it doesn't

We give each county's own figure and no single number for the region: a regional median would be set by whichever county drills the most.
A deeper well can mean a falling water table, a different aquifer, better water quality or simply more reserve.
The water level is measured once, when each well is finished, so drought years pull it down. 2022 and 2023 were dry years in much of Texas.

Questions

How deep are water wells around Dallas-Fort Worth?

Which county in Dallas-Fort Worth has the deepest water wells?

Collin County, with a median of 1,020 feet and a middle half from 825 to 1,424 feet (50 wells, in the last 10 years).

Sources you can check

Texas Water Development Board, Submitted Driller's Reports database. The state's own file, rebuilt every night. Direct download (we used the file of November 10, 2026, 145 MB). SHA-256: 10b60ed0d9895e735f0b2c7833b5aa39de7a56fd68454fe16b3c14684f61ea7b
U.S. Census Bureau, metropolitan area delineation files (Dallas-Fort Worth-Arlington, TX; July 2023 delineation)
TWDB well report viewer: the official report of each well, one by one
TerraFunded, Texas Well Atlas dataset, archived on Zenodo. One row per well, no names, locations generalized to about 1.5 km. DOI 10.5281/zenodo.24126380.

Check it yourself

Download this page's table as a CSV (dallas-fort-worth-water-well-depth.csv): every figure in the text is in it.
Open any county in the table. Its page lists its figures, and each well on its map opens the official report on the state's site.
For the raw data, download the state file from the TWDB link in the sources and keep the wells whose proposed use is Domestic and whose work is a new well or a replacement.
If a figure does not match, write to us with the county and the number: we correct it in the next update and say so.

How we got it

We count new and replacement domestic (home) wells with a valid depth on their report. Monitoring wells, soil borings, injection, geothermal and oilfield wells are left out. A depth under 10 feet or over 5,000 feet is treated as an entry error.

County figures use the wells finished in the last 10 years when there are at least 30; otherwise all since 2001. The median is the middle well: half are deeper, half shallower. Only counties with 30 wells or more are ranked.

We compare the wells finished in 2003 to 2007 with those finished in 2021 to 2025, in every county with at least 30 wells in each period. The 95% interval for the difference in medians comes from 2,000 bootstrap resamples. A county counts as deeper or shallower only when that interval excludes zero and the change is at least 10%. For the water level we require at least 5 feet and 10%.

The full method · All open data

How to cite this

TerraFunded (2026). "Around Dallas-Fort Worth, home wells run from 55 feet in Dallas County to 1,020 in Collin." Texas Well Atlas. From the Texas Water Development Board, Submitted Driller's Reports database (state file of November 10, 2026). https://terrafunded.com/wells/findings/dallas-fort-worth-water-well-depth. License CC BY 4.0. Dataset: https://doi.org/10.5281/zenodo.24126380.

Free to use with credit under CC BY 4.0. Journalists: write to us for any county's figures.

More findings

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