⟁ Illinois Well Data field records · 2026 survey

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Bolliger, John & Sons

Recorded as the driller on 142 water wells across 12Illinoiscounties in the Illinois State Geological Survey water well records, most in Livingston County. Well-log records span 1930–1966.

142wells on record
—since 2022
12counties served
140 ftmedian depth

Counties served

Wells drilled by Bolliger, John & Sons, by county, across the full record.

CountyWells drilled
Livingston County89
Iroquois County29
Lasalle County7
Ford County5
Mason County4
Champaign County2
Gallatin County1
Hancock County1
Marshall County1
Grundy County1
Kendall County1
Dekalb County1

Well characteristics

Across the wells Bolliger, John & Sons has drilled, the median depth is 140 ft (middle half 99 ft–211 ft), median tested yield 17 gpm, and median static water level — below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Bolliger, John & Sons, straight from the public ISGS record:

"Records span 1930–1966" refers to the earliest and latest well logs attributed to this company in the ISGS 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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