⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Stillwater County

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

✓ 5,817 GWIC records · verified 2026-06-10

60 ftmedian well depth
33 ft–126 fttypical depth range
20 ftmedian static water level
20 gpmmedian yield (4,938 tests)

How deep are wells in Stillwater County, Montana?

The median drilled well depth in Stillwater County is 60 ft, based on 5,667 wells with recorded depths in the state GWIC database. Half of all wells fall between 33 ft and 126 ft; 90% are shallower than 246 ft. Wells drilled since 2016 have a median depth of 62 ft.

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

Applying published per-foot rates to the local median depth of 62 ft: drilling and casing alone typically runs $1,550–$4,030; a complete system including pump, pressure tank, and hookup typically runs $3,720–$6,820. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Stillwater County?

The median static water level is 20 ft below ground surface (middle half of wells: 11 ft–42 ft), from 4,998 measurements.

How much water do wells in Stillwater County produce?

The median tested yield is 20 gpm (middle half: 8 gpm–40 gpm), from 4,938 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 2,423 50–100 ft 1,385 100–150 ft 657 150–200 ft 401 200–300 ft 393 300–400 ft 197 400–600 ft 136 600+ ft 75

Who drills wells in Stillwater County?

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

Drilling companyWells since 2016
AAQUA DRILLING INC526
A-1 DRILLING99
AMERICAN DRILLING & SUPPLY38
OKEEFE DRILLING CO35
DOUGLAS DRILLING32
BERTRAM DRILLING INC23
HAZ TECH DRILLING INC12
O'KEEFE DRILLING COMPANY9

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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.