⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Flathead County

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

✓ 21,981 GWIC records · verified 2026-08-24

191 ftmedian well depth
102 ft–300 fttypical depth range
55 ftmedian static water level
25 gpmmedian yield (20,008 tests)

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How deep are wells in Flathead County, Montana?

The median drilled well depth in Flathead County is 191 ft, based on 21,528 wells with recorded depths in the state GWIC database. Half of all wells fall between 102 ft and 300 ft; 90% are shallower than 446 ft. Wells drilled since 2016 have a median depth of 245 ft.

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

Applying published per-foot rates to the local median depth of 245 ft: drilling and casing alone typically runs $6,125–$15,925; a complete system including pump, pressure tank, and hookup typically runs $14,700–$24,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Flathead County?

The median static water level is 55 ft below ground surface (middle half of wells: 20 ft–105 ft), from 19,459 measurements.

How much water do wells in Flathead County produce?

The median tested yield is 25 gpm (middle half: 15 gpm–45 gpm), from 20,008 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 3,204 50–100 ft 1,908 100–150 ft 2,748 150–200 ft 3,279 200–300 ft 4,933 300–400 ft 2,445 400–600 ft 1,959 600+ ft 1,052

Who drills wells in Flathead County?

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

DrillerWells since 2016
BILLMAYER DRILLING511
DAVIS BROTHERS DRILLING403
GLAZIER DRILLING392
COLDWATER DRILLING AND PUMPS367
CHAMBERS DRILLING COMPANY356
OH WELL DRILLING AND PUMP346
ALLWEST DRILLING INC325
RM DRILLING AND WELL SERVICES258

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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.