Montana Well Data field records · 2026 survey

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Castlio Drilling

Recorded as the driller on 645 water wells across 8 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Lake County. Well-log records span 1977–2007.

645wells on record
since 2022
8counties served
203 ftmedian depth

Counties served

Wells drilled by Castlio Drilling, by county, across the full record.

CountyWells drilled
Lake County 519
Flathead County 66
Sanders County 44
Missoula County 11
Broadwater County 2
Lincoln County 1
Mineral County 1
Ravalli County 1

Well characteristics

Across the wells Castlio Drilling has drilled, the median depth is 203 ft (middle half 134 ft–340 ft), median tested yield 25 gpm, and median static water level 55 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Castlio Drilling, straight from the public MBMG record:

"Records span 1977–2007" refers to the earliest and latest well logs attributed to this company in the MBMG database — the state digitized older paper logs, so the first date is the oldest record on file, not necessarily the company's founding year.

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