⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Jefferson County

Jefferson County, Montana: well depth, water level & drilling cost

✓ 5,309 GWIC records · verified 2026-08-24

181 ftmedian well depth
96 ft–300 fttypical depth range
50 ftmedian static water level
20 gpmmedian yield (4,971 tests)

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How deep are wells in Jefferson County, Montana?

The median drilled well depth in Jefferson County is 181 ft, based on 5,242 wells with recorded depths in the state GWIC database. Half of all wells fall between 96 ft and 300 ft; 90% are shallower than 440 ft. Wells drilled since 2016 have a median depth of 246 ft.

How much does it cost to drill a well in Jefferson County?

Applying published per-foot rates to the local median depth of 246 ft: drilling and casing alone typically runs $6,150–$15,990; a complete system including pump, pressure tank, and hookup typically runs $14,760–$24,600. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Jefferson County?

The median static water level is 50 ft below ground surface (middle half of wells: 20 ft–100 ft), from 5,025 measurements.

How much water do wells in Jefferson County produce?

The median tested yield is 20 gpm (middle half: 10 gpm–30 gpm), from 4,971 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 541 50–100 ft 810 100–150 ft 847 150–200 ft 562 200–300 ft 1,056 300–400 ft 677 400–600 ft 564 600+ ft 185

Who drills wells in Jefferson County?

Companies by number of wells completed in this county since 2016, per filed well logs.

DrillerWells since 2016
H & L DRILLING INC223
A-10 DRILLING204
WESTERN WATER WELLS100
OKEEFE DRILLING CO95
LINDSAY DRILLING CO INC90
RED TIGER DRILLING72
AAAA WATER WELL DRILLING INC51
LINDSAY DRILLING CO27

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Method: medians computed from GWIC records (site type WELL, non-abandoned; depths 0–5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.