Montana Well Data › Flathead County

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

Name: Flathead County, Montana water well statistics
Creator: Montana Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 22,037 GWIC records · verified 2026-10-02

192 ftmedian well depth

102 ft–300 fttypical depth range

55 ftmedian static water level

25 gpmmedian yield (20,064 tests)

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How deep are wells in Flathead County, Montana?

The median drilled well depth in Flathead County is 192 ft, based on 21,584 wells with recorded depths in the state GWIC database. Half of all wells fall between 102 ft and 300 ft; 90% are shallower than 447 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 19,512 measurements.

How much water do wells in Flathead County produce?

The median tested yield is 25 gpm (middle half: 15 gpm–45 gpm), from 20,064 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 3,205 50–100 ft 1,910 100–150 ft 2,749 150–200 ft 3,289 200–300 ft 4,952 300–400 ft 2,452 400–600 ft 1,971 600+ ft 1,056

Who drills wells in Flathead County?

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

Driller	Wells since 2016
BILLMAYER DRILLING	513
DAVIS BROTHERS DRILLING	418
GLAZIER DRILLING	397
COLDWATER DRILLING AND PUMPS	377
CHAMBERS DRILLING COMPANY	362
OH WELL DRILLING AND PUMP	348
ALLWEST DRILLING INC	325
RM DRILLING AND WELL SERVICES	264

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Well records by ZIP code in Flathead County

Median depth, water level, and yield for each ZIP code with recorded wells.

Kalispell (59904) — 3,730 wells, median 140 ft
Bigfork (59911) — 3,587 wells, median 167 ft
Columbia Falls (59912) — 3,248 wells, median 165 ft
Whitefish (59937) — 2,826 wells, median 225 ft
Kalispell (59903) — 2,253 wells, median 260 ft
Kalispell (59901) — 2,196 wells, median 147 ft
Somers (59932) — 1,227 wells, median 284 ft
Marion (59925) — 942 wells, median 234 ft
Kila (59920) — 878 wells, median 336 ft
Lakeside (59922) — 695 wells, median 325 ft
Coram (59913) — 484 wells, median 109 ft
Polebridge (59928) — 325 wells, median 119 ft
Olney (59927) — 322 wells, median 196 ft
West Glacier (59936) — 312 wells, median 78 ft
Martin City (59926) — 185 wells, median 119 ft
Hungry Horse (59919) — 159 wells, median 102 ft
Essex (59916) — 135 wells, median 140 ft
Lake Mc Donald (59921) — 77 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.