Illinois Well Data › Mercer County
Mercer County, Illinois: well depth, yield & drilling cost
✓ 1,755 ISGS records · verified 2026-10-12
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How deep are wells in Mercer County, Illinois?
The median drilled well depth in Mercer County is 395 ft, based on 1,741 wells with recorded depths in the state ISGS database. Half of all wells fall between 122 ft and 473 ft; 90% are shallower than 515 ft. Wells drilled since 2016 have a median depth of 394 ft.
How much does it cost to drill a well in Mercer County?
Applying published per-foot rates to the local median depth of 395 ft: drilling and casing alone typically runs $9,875–$25,675; a complete system including pump, pressure tank, and hookup typically runs $23,700–$39,500. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Mercer County?
Few static water level measurements are recorded for this county.
How much water do wells in Mercer County produce?
The median tested yield is 25 gpm (middle half: 15 gpm–40 gpm), from 1,334 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Mercer County?
Companies and licensed drillers by number of wells logged in this county, per records filed with the Illinois State Geological Survey.
| Driller | Wells since 2016 |
|---|---|
| White, Matt | 42 |
| Allen, Joseph | 20 |
| Stoll, Austen | 18 |
| Gingerich, Corwin | 17 |
| Henry, John | 8 |
| Gelement, Val | 7 |
| Meyer, Seth | 7 |
| Harvey, Lucius | 5 |
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Well records by ZIP code in Mercer County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Sherrard (61281) — 263 wells, median 448 ft
- New Boston (61272) — 262 wells, median 110 ft
- Viola (61486) — 234 wells, median 451 ft
- Aledo (61231) — 213 wells, median 398 ft
- Preemption (61276) — 168 wells, median 432 ft
- Keithsburg (61442) — 141 wells, median 87 ft
- Seaton (61476) — 137 wells, median 186 ft
- Joy (61260) — 111 wells, median 402 ft
- New Windsor (61465) — 105 wells, median 485 ft
- Matherville (61263) — 87 wells, median 421 ft
- North Henderson (61466) — 82 wells, median 484 ft
Method: medians computed from ISGS records (ISGS water wells; engineering, mineral and stratigraphic test borings, mine shafts, outcrops and monitoring wells are excluded, as are wells the survey records as plugged; depths 0-5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.