Illinois Well Data › Mchenry County
Mchenry County, Illinois: well depth, yield & drilling cost
✓ 23,076 ISGS records · verified 2026-10-12
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How deep are wells in Mchenry County, Illinois?
The median drilled well depth in Mchenry County is 126 ft, based on 22,743 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.
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 16,524 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
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.
| Driller | Wells since 2016 |
|---|---|
| Huemann, Joseph J. | 468 |
| Binz, David Joseph | 156 |
| Keller, Larry | 136 |
| Snelten, Greg | 40 |
| Brad Snelten | 38 |
| Nice, Mark E. | 35 |
| Deppe, Edward M. | 23 |
| Grieves, Clifford | 21 |
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Well records by ZIP code in Mchenry County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Mchenry (60051) — 2,636 wells, median 73 ft
- Spring Grove (60081) — 2,436 wells, median 118 ft
- Wonder Lake (60097) — 2,222 wells, median 109 ft
- Island Lake (60042) — 1,869 wells, median 117 ft
- Crystal Lake (60012) — 1,790 wells, median 153 ft
- Cary (60013) — 1,760 wells, median 190 ft
- Fox River Grove (60021) — 1,551 wells, median 130 ft
- Union (60180) — 1,266 wells, median 195 ft
- Mchenry (60050) — 1,240 wells, median 120 ft
- Harvard (60033) — 1,231 wells, median 170 ft
- Marengo (60152) — 1,215 wells, median 152 ft
- Crystal Lake (60014) — 1,019 wells, median 104 ft
- Richmond (60071) — 882 wells, median 140 ft
- Ringwood (60072) — 783 wells, median 159 ft
- Alden (60001) — 692 wells, median 125 ft
- Algonquin (60102) — 649 wells, median 148 ft
- Woodstock (60098) — 438 wells, median 165 ft
- Huntley (60142) — 374 wells, median 195 ft
- Hebron (60034) — 373 wells, median 126 ft
- Lake In The Hills (60156) — 109 wells, median 199 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.