Montana Well Data › Fergus County
Fergus County, Montana: well depth, water level & drilling cost
✓ 3,763 GWIC records · verified 2026-10-02
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How deep are wells in Fergus County, Montana?
The median drilled well depth in Fergus County is 127 ft, based on 3,656 wells with recorded depths in the state GWIC database. Half of all wells fall between 50 ft and 300 ft; 90% are shallower than 600 ft. Wells drilled since 2016 have a median depth of 120 ft.
How much does it cost to drill a well in Fergus County?
Applying published per-foot rates to the local median depth of 120 ft: drilling and casing alone typically runs $3,000–$7,800; a complete system including pump, pressure tank, and hookup typically runs $7,200–$12,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Fergus County?
The median static water level is 32 ft below ground surface (middle half of wells: 14 ft–75 ft), from 2,948 measurements.
How much water do wells in Fergus County produce?
The median tested yield is 15 gpm (middle half: 8 gpm–25 gpm), from 3,010 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Fergus 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 Fergus County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Lewistown (59457) — 1,442 wells, median 125 ft
- Hilger (59451) — 480 wells, median 95 ft
- Moore (59464) — 412 wells, median 37 ft
- Forest Grove (59441) — 290 wells, median 180 ft
- Denton (59430) — 265 wells, median 23 ft
- Winifred (59489) — 259 wells, median 171 ft
- Roy (59471) — 253 wells, median 130 ft
- Grass Range (59032) — 251 wells, median 179 ft
- Coffee Creek (59424) — 122 wells, median 80 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.