Illinois Well Data › Grundy County
Grundy County, Illinois: well depth, yield & drilling cost
✓ 3,475 ISGS records · verified 2026-08-20
How deep are wells in Grundy County, Illinois?
The median drilled well depth in Grundy County is 168 ft, based on 3,416 wells with recorded depths in the state ISGS database. Half of all wells fall between 90 ft and 350 ft; 90% are shallower than 520 ft. Wells drilled since 2016 have a median depth of 360 ft.
How much does it cost to drill a well in Grundy County?
Applying published per-foot rates to the local median depth of 360 ft: drilling and casing alone typically runs $9,000–$23,400; a complete system including pump, pressure tank, and hookup typically runs $21,600–$36,000. Actual quotes depend on site access, geology, and casing requirements.
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What is the static water level in Grundy County?
Few static water level measurements are recorded for this county.
How much water do wells in Grundy County produce?
The median tested yield is 12 gpm (middle half: 10 gpm–20 gpm), from 1,550 pump tests. A typical household needs 5–10 gpm.
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Drilled depth distribution
Who drills wells in Grundy 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 |
|---|---|
| Liberg, Steve Jr. | 74 |
| Area Well & Pump | 54 |
| Knierim, Ken/K & K Well Drlg. | 38 |
| Willis Well Drilling | 17 |
| Strange, Robert E. | 17 |
| Wills, William D. | 9 |
| Will County Well & Pump | 3 |
| Strange, Michael | 3 |
See every driller with wells on record in Grundy County, ranked →
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Free lookup Property report — $29Method: 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.