⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Granite County

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

✓ 2,395 GWIC records · verified 2026-07-27

80 ftmedian well depth
45 ft–180 fttypical depth range
30 ftmedian static water level
20 gpmmedian yield (2,119 tests)

How deep are wells in Granite County, Montana?

The median drilled well depth in Granite County is 80 ft, based on 2,378 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 126 ft.

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

Applying published per-foot rates to the local median depth of 126 ft: drilling and casing alone typically runs $3,150–$8,190; a complete system including pump, pressure tank, and hookup typically runs $7,560–$12,600. Actual quotes depend on site access, geology, and casing requirements.

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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 2,076 measurements.

How much water do wells in Granite County produce?

The median tested yield is 20 gpm (middle half: 12 gpm–30 gpm), from 2,119 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 620 50–100 ft 693 100–150 ft 322 150–200 ft 198 200–300 ft 239 300–400 ft 136 400–600 ft 108 600+ ft 62

Who drills wells in Granite County?

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

DrillerWells since 2016
OKEEFE DRILLING CO229
JEROMES DRILLING CO95
AK DRILLING INC51
WESTERN WATER WELLS19
AK DRILLING, INC.19
WESTERN MONTANA DRILLING CO.15
AQUASOURCE DRILLING LLC8
HEIMARK DRILLING8

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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.