Illinois Well Data › Dekalb County
Dekalb County, Illinois: well depth, yield & drilling cost
✓ 3,554 ISGS records · verified 2026-10-12
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How deep are wells in Dekalb County, Illinois?
The median drilled well depth in Dekalb County is 202 ft, based on 3,512 wells with recorded depths in the state ISGS database. Half of all wells fall between 160 ft and 270 ft; 90% are shallower than 400 ft. Wells drilled since 2016 have a median depth of 200 ft.
How much does it cost to drill a well in Dekalb County?
Applying published per-foot rates to the local median depth of 202 ft: drilling and casing alone typically runs $5,050–$13,130; a complete system including pump, pressure tank, and hookup typically runs $12,120–$20,200. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Dekalb County?
Few static water level measurements are recorded for this county.
How much water do wells in Dekalb County produce?
The median tested yield is 20 gpm (middle half: 15 gpm–30 gpm), from 2,186 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Dekalb 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 |
|---|---|
| Stone, Bradley W. | 31 |
| Knierim, Ken/K & K Well Drlg. | 15 |
| Matt Liberg | 8 |
| Weirich, William Theodore | 6 |
| Neely, Mark S. | 6 |
| Nice, Mark E. | 6 |
| Jablonski, John A. | 4 |
| Roop, Randy/Jonas Martin Drlg. | 3 |
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Well records by ZIP code in Dekalb County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Sycamore (60178) — 750 wells, median 185 ft
- Genoa (60135) — 492 wells, median 177 ft
- Kingston (60145) — 381 wells, median 185 ft
- Kirkland (60146) — 264 wells, median 150 ft
- Dekalb (60115) — 234 wells, median 225 ft
- Cortland (60112) — 229 wells, median 204 ft
- Hinckley (60520) — 222 wells, median 235 ft
- Sandwich (60548) — 200 wells, median 180 ft
- Shabbona (60550) — 161 wells, median 365 ft
- Malta (60150) — 141 wells, median 320 ft
- Waterman (60556) — 140 wells, median 225 ft
- Clare (60111) — 127 wells, median 285 ft
- Esmond (60129) — 103 wells, median 238 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.