Underhill Well & Pump Co. LLC
Recorded as the driller on 519 water wells across 14 Ohio counties in the Ohio Department of Natural Resources (ODNR) Division of Geological Survey water-well log database, most in Madison County. Well-log records span 1949–2026.
Counties served
Wells drilled by Underhill Well & Pump Co. LLC, by county, across the full record.
| County | Wells drilled |
|---|---|
| Madison County | 279 |
| Franklin County | 78 |
| Union County | 65 |
| Champaign County | 31 |
| Clark County | 24 |
| Fayette County | 9 |
| Licking County | 7 |
| Pickaway County | 7 |
| Delaware County | 6 |
| Fairfield County | 5 |
| Logan County | 5 |
| Clinton County | 1 |
…and 2 more Ohio counties.
Well characteristics
Across the wells Underhill Well & Pump Co. LLC has drilled, the median depth is 110 ft (middle half 82 ft–151 ft), median tested yield 20 gpm, and median static water level 33 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Underhill Well & Pump Co. LLC, straight from the public ODNR record:
"Records span 1949–2026" refers to the earliest and latest well logs attributed to this company in the ODNR 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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