⟁ Illinois Well Data field records · 2026 survey

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Gray Well Drlg

Recorded as the driller on 35 water wells across 8Illinoiscounties in the Illinois State Geological Survey water well records, most in Cook County. Well-log records span 1913–1940.

35wells on record
—since 2022
8counties served
855 ftmedian depth

Counties served

Wells drilled by Gray Well Drlg, by county, across the full record.

CountyWells drilled
Cook County12
Lake County6
Will County5
Kane County3
Dupage County3
Mchenry County3
Whiteside County2
Mercer County1

Well characteristics

Across the wells Gray Well Drlg has drilled, the median depth is 855 ft (middle half 310 ft–1,539 ft), median tested yield 25 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 Gray Well Drlg, straight from the public ISGS record:

"Records span 1913–1940" 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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