⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Granite County

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

✓ 2,388 GWIC records · verified 2026-06-10

80 ftmedian well depth
45 ft–180 fttypical depth range
30 ftmedian static water level
20 gpmmedian yield (2,112 tests)

How deep are wells in Granite County, Montana?

The median drilled well depth in Granite County is 80 ft, based on 2,371 wells with recorded depths in the state GWIC database. Half of all wells fall between 45 ft and 180 ft; 90% are shallower than 330 ft. Wells drilled since 2016 have a median depth of 122 ft.

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

Applying published per-foot rates to the local median depth of 122 ft: drilling and casing alone typically runs $3,050–$7,930; a complete system including pump, pressure tank, and hookup typically runs $7,320–$13,420. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Granite County?

The median static water level is 30 ft below ground surface (middle half of wells: 15 ft–75 ft), from 2,070 measurements.

How much water do wells in Granite County produce?

The median tested yield is 20 gpm (middle half: 12 gpm–30 gpm), from 2,112 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 620 50–100 ft 692 100–150 ft 320 150–200 ft 198 200–300 ft 237 300–400 ft 135 400–600 ft 107 600+ ft 62

Who drills wells in Granite County?

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

Drilling companyWells since 2016
OKEEFE DRILLING CO216
JEROMES DRILLING CO95
AK DRILLING INC48
WESTERN WATER WELLS19
AK DRILLING, INC.19
WESTERN MONTANA DRILLING CO.14
O'KEEFE DRILLING CO10
AQUASOURCE DRILLING LLC8

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Looking at a specific property in Granite County?

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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.