Illinois Well Data › Johnson County
Johnson County, Illinois: well depth, yield & drilling cost
✓ 484 ISGS records · verified 2026-10-12
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How deep are wells in Johnson County, Illinois?
The median drilled well depth in Johnson County is 192 ft, based on 484 wells with recorded depths in the state ISGS database. Half of all wells fall between 110 ft and 276 ft; 90% are shallower than 405 ft. Wells drilled since 2016 have a median depth of 240 ft.
How much does it cost to drill a well in Johnson County?
Applying published per-foot rates to the local median depth of 192 ft: drilling and casing alone typically runs $4,800–$12,480; a complete system including pump, pressure tank, and hookup typically runs $11,520–$19,200. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Johnson County?
Few static water level measurements are recorded for this county.
How much water do wells in Johnson County produce?
The median tested yield is 9 gpm (middle half: 5 gpm–10 gpm), from 326 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Johnson 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 |
|---|---|
| Beanland, Glen | 14 |
| Beanland, Leonard Ralph | 13 |
| Greg A. Evans | 2 |
| Durbin, Dominique | 2 |
| Haake, Ralph | 1 |
| Scates, Stephen T. | 1 |
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Well records by ZIP code in Johnson County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Cypress (62923) — 65 wells, median 200 ft
- Vienna (62995) — 62 wells, median 213 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.