Illinois Well Data › Coles County
Coles County, Illinois: well depth, yield & drilling cost
✓ 1,540 ISGS records · verified 2026-10-12
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How deep are wells in Coles County, Illinois?
The median drilled well depth in Coles County is 65 ft, based on 1,513 wells with recorded depths in the state ISGS database. Half of all wells fall between 44 ft and 108 ft; 90% are shallower than 184 ft. Wells drilled since 2016 have a median depth of 68 ft.
How much does it cost to drill a well in Coles County?
Applying published per-foot rates to the local median depth of 65 ft: drilling and casing alone typically runs $1,625–$4,225; a complete system including pump, pressure tank, and hookup typically runs $3,900–$6,500. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Coles County?
Few static water level measurements are recorded for this county.
How much water do wells in Coles County produce?
The median tested yield is 7 gpm (middle half: 5 gpm–12 gpm), from 518 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Coles 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 |
|---|---|
| Skinner, Todd | 11 |
| Durbin, Kandra M. | 7 |
| Gaza, John Edward | 2 |
| Hemmen, Jake | 1 |
| Harriss, Chuck | 1 |
| Baker, J. Curtis | 1 |
| Tri County Irrigation & | 1 |
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Well records by ZIP code in Coles County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Charleston (61920) — 398 wells, median 65 ft
- Mattoon (61938) — 263 wells, median 67 ft
- Humboldt (61931) — 194 wells, median 57 ft
- Oakland (61943) — 177 wells, median 50 ft
- Ashmore (61912) — 144 wells, median 69 ft
- Trilla (62469) — 130 wells, median 42 ft
- Lerna (62440) — 103 wells, median 100 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.