Montana Well Data › Granite County
Granite County, Montana: well depth, water level & drilling cost
✓ 2,416 GWIC records · verified 2026-10-02
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How deep are wells in Granite County, Montana?
The median drilled well depth in Granite County is 80 ft, based on 2,399 wells with recorded depths in the state GWIC database. Half of all wells fall between 45 ft and 180 ft; 90% are shallower than 340 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–$12,200. 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 2,095 measurements.
How much water do wells in Granite County produce?
The median tested yield is 20 gpm (middle half: 12 gpm–30 gpm), from 2,131 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Granite County?
Companies by number of wells completed in this county since 2016, per filed well logs.
| Driller | Wells since 2016 |
|---|---|
| OKEEFE DRILLING CO | 240 |
| JEROMES DRILLING CO | 95 |
| AK DRILLING INC | 51 |
| WESTERN WATER WELLS | 19 |
| AK DRILLING, INC. | 19 |
| WESTERN MONTANA DRILLING CO. | 15 |
| HEIMARK DRILLING | 12 |
| AQUASOURCE DRILLING LLC | 8 |
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Well records by ZIP code in Granite County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Philipsburg (59858) — 1,429 wells, median 140 ft
- Hall (59837) — 482 wells, median 70 ft
- Drummond (59832) — 422 wells, median 70 ft
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.