Montana Well Data › Custer County
Custer County, Montana: well depth, water level & drilling cost
✓ 3,229 GWIC records · verified 2026-10-02
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How deep are wells in Custer County, Montana?
The median drilled well depth in Custer County is 180 ft, based on 3,113 wells with recorded depths in the state GWIC database. Half of all wells fall between 80 ft and 330 ft; 90% are shallower than 559 ft. Wells drilled since 2016 have a median depth of 230 ft.
How much does it cost to drill a well in Custer County?
Applying published per-foot rates to the local median depth of 230 ft: drilling and casing alone typically runs $5,750–$14,950; a complete system including pump, pressure tank, and hookup typically runs $13,800–$23,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Custer County?
The median static water level is 60 ft below ground surface (middle half of wells: 20 ft–140 ft), from 2,524 measurements.
How much water do wells in Custer County produce?
The median tested yield is 15 gpm (middle half: 8 gpm–20 gpm), from 2,754 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Custer County?
Companies by number of wells completed in this county since 2016, per filed well logs.
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Well records by ZIP code in Custer County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Miles City (59301) — 1,362 wells, median 100 ft
- Volborg (59351) — 515 wells, median 140 ft
- Kinsey (59338) — 359 wells, median 300 ft
- Ismay (59336) — 250 wells, median 195 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.