Illinois Well Data › Williamson County
Williamson County, Illinois: well depth, yield & drilling cost
✓ 539 ISGS records · verified 2026-10-12
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How deep are wells in Williamson County, Illinois?
The median drilled well depth in Williamson County is 155 ft, based on 539 wells with recorded depths in the state ISGS database. Half of all wells fall between 100 ft and 268 ft; 90% are shallower than 403 ft. Wells drilled since 2016 have a median depth of 264 ft.
How much does it cost to drill a well in Williamson County?
Applying published per-foot rates to the local median depth of 155 ft: drilling and casing alone typically runs $3,875–$10,075; a complete system including pump, pressure tank, and hookup typically runs $9,300–$15,500. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Williamson County?
Few static water level measurements are recorded for this county.
How much water do wells in Williamson County produce?
The median tested yield is 10 gpm (middle half: 5 gpm–20 gpm), from 365 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Williamson 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 | 21 |
| Beanland, Leonard Ralph | 20 |
| Beanland, John R. | 1 |
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Well records by ZIP code in Williamson County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Goreville (62939) — 195 wells, median 177 ft
- Carbondale (62902) — 152 wells, median 180 ft
- Creal Springs (62922) — 81 wells, median 180 ft
- Marion (62959) — 75 wells, median 300 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.