⟁ Montana Well Data field records · 2026 survey

Montana Well Data › Madison County

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

✓ 6,633 GWIC records · verified 2026-08-24

100 ftmedian well depth
55 ft–205 fttypical depth range
32 ftmedian static water level
22 gpmmedian yield (5,952 tests)

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How deep are wells in Madison County, Montana?

The median drilled well depth in Madison County is 100 ft, based on 6,526 wells with recorded depths in the state GWIC database. Half of all wells fall between 55 ft and 205 ft; 90% are shallower than 342 ft. Wells drilled since 2016 have a median depth of 160 ft.

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

Applying published per-foot rates to the local median depth of 160 ft: drilling and casing alone typically runs $4,000–$10,400; a complete system including pump, pressure tank, and hookup typically runs $9,600–$16,000. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Madison County?

The median static water level is 32 ft below ground surface (middle half of wells: 13 ft–85 ft), from 6,055 measurements.

How much water do wells in Madison County produce?

The median tested yield is 22 gpm (middle half: 15 gpm–35 gpm), from 5,952 pump tests. A typical household needs 5–10 gpm.

Drilled depth distribution

0–50 ft 1,389 50–100 ft 1,698 100–150 ft 1,022 150–200 ft 625 200–300 ft 867 300–400 ft 421 400–600 ft 368 600+ ft 136

Who drills wells in Madison County?

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

DrillerWells since 2016
GRAHAM DRILLING INC598
RED TIGER DRILLING161
POTTS DRILLING INC131
OKEEFE DRILLING CO63
VAN DYKEN DRILLING INC54
AK DRILLING INC35
DIAMOND M DRILLING INC31
GRAHAM DRILLING & PUMPS29

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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.