⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Lewis and Clark County

Lewis and Clark County, Montana: well depth, water level & drilling cost

✓ 17,141 GWIC records · verified 2026-07-27

105 ftmedian well depth
60 ft–195 fttypical depth range
39 ftmedian static water level
20 gpmmedian yield (15,501 tests)

How deep are wells in Lewis and Clark County, Montana?

The median drilled well depth in Lewis and Clark County is 105 ft, based on 16,862 wells with recorded depths in the state GWIC database. Half of all wells fall between 60 ft and 195 ft; 90% are shallower than 340 ft. Wells drilled since 2016 have a median depth of 140 ft.

How much does it cost to drill a well in Lewis and Clark County?

Applying published per-foot rates to the local median depth of 140 ft: drilling and casing alone typically runs $3,500–$9,100; a complete system including pump, pressure tank, and hookup typically runs $8,400–$14,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Lewis and Clark County?

The median static water level is 39 ft below ground surface (middle half of wells: 17 ft–73 ft), from 16,061 measurements.

How much water do wells in Lewis and Clark County produce?

The median tested yield is 20 gpm (middle half: 15 gpm–30 gpm), from 15,501 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 2,770 50–100 ft 4,893 100–150 ft 3,487 150–200 ft 1,599 200–300 ft 1,873 300–400 ft 1,014 400–600 ft 915 600+ ft 311

Who drills wells in Lewis and Clark County?

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

DrillerWells since 2016
H & L DRILLING INC877
A-10 DRILLING696
WESTERN WATER WELLS438
AAAA WATER WELL DRILLING INC173
MT POVERTY WATER WELL DRILLING112
LINDSAY DRILLING CO INC106
OKEEFE DRILLING CO76
406 WATER WELLS, LLC48

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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.