⟁ Illinois Well Data field records · 2026 survey

Illinois Well Data › Mchenry County

Mchenry County, Illinois: well depth, yield & drilling cost

✓ 22,936 ISGS records · verified 2026-08-20

125 ftmedian well depth
75 ft–200 fttypical depth range
12 gpmmedian yield (16,431 tests)

How deep are wells in Mchenry County, Illinois?

The median drilled well depth in Mchenry County is 125 ft, based on 22,607 wells with recorded depths in the state ISGS database. Half of all wells fall between 75 ft and 200 ft; 90% are shallower than 250 ft. Wells drilled since 2016 have a median depth of 99 ft.

How much does it cost to drill a well in Mchenry County?

Applying published per-foot rates to the local median depth of 99 ft: drilling and casing alone typically runs $2,475–$6,435; a complete system including pump, pressure tank, and hookup typically runs $5,940–$9,900. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Mchenry County?

Few static water level measurements are recorded for this county.

How much water do wells in Mchenry County produce?

The median tested yield is 12 gpm (middle half: 10 gpm–20 gpm), from 16,431 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 1,880 50–100 ft 6,766 100–150 ft 4,510 150–200 ft 3,638 200–300 ft 4,886 300–400 ft 647 400–600 ft 183 600+ ft 97

Who drills wells in Mchenry County?

Companies and licensed drillers by number of wells logged in this county, per records filed with the Illinois State Geological Survey.

DrillerWells since 2016
Huemann, Joseph J.466
Binz, David Joseph154
Keller, Larry132
Snelten, Greg40
Brad Snelten38
Nice, Mark E.35
Deppe, Edward M.22
Grieves, Clifford21

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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.