How deep are water wells in Oldham County, Texas?

Half of the home water wells drilled in Oldham County in the last 10 years are between 300 and 328 feet deep. The median is 322 feet, based on 54 driller reports filed with the state. Drillers measured the water standing a median 220 feet below the surface (46 wells). That is deeper than the Texas median of 250 feet.

Updated every day from Texas Water Development Board driller reports. Last update: November 10, 2026, using the state file of November 9, 2026. 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.

Key figures

Typical depth (middle half)
300 to 328 ft
Median depth
322 feet
Deepest 10% are past
344 feet
Water level (median)
220 feet (46 wells)
Yield (median)
16 gallons per minute (80% pump-tested)
Wells used
54
Period
Last 10 years
Latest report
July 28, 2026
Depth rank
106 of 245 (1 = deepest)
Confidence
Standard

How deep the wells are

Number of home wells by depth, last 10 years (or since 2001 where wells are few).

Depth (ft)Wells
100 to 1501
150 to 2002
200 to 2507
250 to 3003
300 to 35036
350 to 4001
400 to 4501
500 to 5503

Median depth by year

Median depth of home wells finished each year. Years with fewer than 10 wells are not shown.

YearMedian (ft)Wells
200633512
200823013
200926018
201135515
201437016

Are wells in Oldham County getting deeper?

Oldham County does not have enough domestic wells in both 2003 to 2007 and 2021 to 2025 (at least 30 in each) to compare. Read the 20-year study.

Aquifers under the county

The Texas Water Development Board maps the Ogallala, a major aquifer, at the surface (outcrop) across 49% of the county; the Dockum, a minor aquifer, under 98% of the county.

What a well costs in Oldham County

At the median depth for Oldham County (322 feet), a complete home well (drilling, casing, pump, pressure tank and hookup at the well) would cost roughly $10,500 to $26,000, by TerraFunded's estimate from published Texas prices. Trenching and the line to the house are extra. Get quotes from at least two licensed drillers.

Neighboring counties

Common questions

How deep do I need to drill a well in Oldham County?

The middle half of home wells drilled there are 300 to 328 feet deep; one in ten goes past 344 feet. The depth a given tract needs depends on where it is and what layers the driller hits.

How much does a water well cost in Oldham County?

At the median depth (322 feet), a complete well would cost roughly $10,500 to $26,000 by TerraFunded's estimate from published Texas driller prices ($25 to $60 per foot plus pump and equipment). The real price comes from a driller's quote.

How much water does a well produce in Oldham County?

Drillers reported a median of 16 gallons per minute (15 wells). Only 80% of those figures come from a pump test; the rest are the driller's estimate, so treat them as a guide.

Are wells in Oldham County getting deeper?

Oldham County does not have enough domestic wells in both 2003 to 2007 and 2021 to 2025 (at least 30 in each) to compare.

How do I see the well report for a property or a neighbor's well?

Every well drilled in Texas since 2001 has a public driller's report. On this page's map, tap a well to open its official report on the state's site, or look it up by location in the TWDB viewer.

How to read these numbers

Figures cover new and replacement domestic (home) wells, from the reports licensed drillers file with the state. Read the full methodology. Download the county table (CSV).

How to cite: TerraFunded Texas Well Atlas, from Texas Water Development Board driller reports (data as of November 9, 2026). https://terrafunded.com/wells

Sources

All counties