texas-water-wells

Water wells in Zapata County, Texas

215 well reports on file. The median well here was taken to 26 ft and struck water at 105 ft — against 180 ft and 80 ft across Texas.

215Reports
26 ftMedian depth
105 ftWater at
30 gpmMedian yield

What you will drill through in Zapata County

Logged in Zapata County, by depth. The figure is how many wells hit it.
Depth, ftWhat was logged there
0–25 ftClay 31, Tan Reddish Sandy Clay 32, Surface Sand 24, Topsoil 10, Sandy Clay,Light Brn 10, Brown Silty Clay 8
25–50 ftShaley Clay, Gray, Very Stiff, High Plasticity, Dry, No Petr 6, Clay 5, Blue Clay 3, Clayey Sand, Fine Grained, Poorly Graded, Gray, Dense, Dry, 2, Shaley Clay, Gray, Hard, Very Plastic, Dry, No Petroleum Hyd 2, Shaley Clay, Greenish Gray, Hard, Very Plastic, Dry, No Petr 2
50–100 ftClay 10, Shale 6, Sand 5, Sand With Clay 5, Sand, Fine Grained, Poorly Graded, Greenish Gray, Dense, Wet 3, Hard Sand 3
100–200 ftClay 25, Sand 13, Hard Rock 9, Shale 8, Sand With Clay 5, Clay W/Sand 5
200–300 ftSand 19, Clay 14, Shale 7, Clay With Sand 8, Hard Rock 6, Sand With Clay 5
300–500 ftSand 36, Clay 22, Sand With Clay 13, Shale 5, Clay With Sand 5, Gray Shale 3
500–1000 ftSand 6, Clay 4, Sand With Clay 3, Clay With Sand 1, Clay W/ Sand 2, Hard Sand 2

The rock column here is what drillers wrote down, layer by layer, in their own words — 5,345,462 layers across 707,856 wells. It is not a geological survey: two drillers may call the same clay by two names, and this site does not correct them.

Who drills in Zapata County

Licensed firms in Zapata County, busiest first.
Firm of recordWellsMedian depth, ftMedian yield, gpmYears
Vortex Drilling, Inc.6015—2008–2012
R. MOLINA WATER WELL SERVICE, INC.40500402003–2015
Vortex Drilling Partners, LP1830—2020–2022
Jones Environmental Drilling, Inc.165—2004
JEDI Drilling Contractors106—2006
Gainco, Inc.8——2012
I Deal Drilling,LLC714—2024–2025
Dennis Drilling Company7735152012–2023
Talon/LPE7——2012
Palacios Water Well Drilling6500302019–2024
Envirotech Drilling Services LLC675—2023
Cinco E Inc.5600162001–2014
Woods Drilling Co.5640112003–2005
EnviroCore, Inc.426—2010–2025
Strata Core Services, LLC449—2018
Front Range Drilling, Inc.324—2014
R. Molina Water Well Serv., Inc.3360122006–2009
T Molina Water Well LLC2530152018
Pipe Creek Water Well, Inc.2820102011–2012
BULLS EYE SERVICES LLC1385172022
Triple C. Drilling1500—2010

What the wells are for

Purpose, and how deep each went.
PurposeWellsShareMedian depth, ft
Environmental Soil Boring10046.5%15
Domestic5123.7%500
Monitor4320.0%60
Stock157.0%500
Irrigation20.9%500
Industrial20.9%1,186
Test Well20.9%640
By decade drilled.
DecadeReportsMedian depth, ftWater at, ft
2000s11115110
2010s644959
2020s4040145

The deepest reports on file

Deepest reports in Zapata County. Column one is the tracking number.
ReportYearDepth, ftWater at, ftYield, gpmPurpose
30222320121,424350—Domestic
29680520121,186340—Industrial
43794320161,000——Domestic
3414200188014260Domestic
3086282012820——Stock
27568220117606535Domestic
4278922016735256—Domestic
25579920117005925Domestic
172612003700——Industrial
254366200866018830Domestic

Every figure on this site is a median, never an average. On reported yield the average is twice the median, because a handful of entries are typing errors — the largest reads 2,200,100 gallons per minute against 30,078 for the next one. Yields above 3,000 gpm (136 wells, 0.045%) and depths beyond 5,000 ft (103 wells, 0.016%) are kept in the file, marked, and left out of the medians.

Drilling a well in Zapata County?

Depth is only half the quote. What it costs depends on the rock, the casing and the pump. Tell us where and we pass the request to licensed Texas drillers.

We are nobody's agent and have no arrangement with any firm today. What we do with this.

Counties with a comparable number of reports

A sliding window, not a ranking. Every county.