⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Jefferson County

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

✓ 5,293 GWIC records · verified 2026-06-10

180 ftmedian well depth
95 ft–300 fttypical depth range
50 ftmedian static water level
20 gpmmedian yield (4,955 tests)

How deep are wells in Jefferson County, Montana?

The median drilled well depth in Jefferson County is 180 ft, based on 5,226 wells with recorded depths in the state GWIC database. Half of all wells fall between 95 ft and 300 ft; 90% are shallower than 440 ft. Wells drilled since 2016 have a median depth of 249 ft.

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

Applying published per-foot rates to the local median depth of 249 ft: drilling and casing alone typically runs $6,225–$16,185; a complete system including pump, pressure tank, and hookup typically runs $14,940–$27,390. 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 5,010 measurements.

How much water do wells in Jefferson County produce?

The median tested yield is 20 gpm (middle half: 10 gpm–30 gpm), from 4,955 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 541 50–100 ft 807 100–150 ft 847 150–200 ft 559 200–300 ft 1,050 300–400 ft 677 400–600 ft 560 600+ ft 185

Who drills wells in Jefferson County?

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

Drilling companyWells since 2016
H & L DRILLING INC223
A-10 DRILLING204
WESTERN WATER WELLS98
LINDSAY DRILLING CO INC90
OKEEFE DRILLING CO86
RED TIGER DRILLING69
AAAA WATER WELL DRILLING INC51
GRAHAM DRILLING INC25

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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 2026-06-10) to the local median depth — full methodology & sources.