Illinois Well Data › Williamson County
Williamson County, Illinois: well depth, yield & drilling cost
✓ 372 ISGS records · verified 2026-08-20
How deep are wells in Williamson County, Illinois?
The median drilled well depth in Williamson County is 154 ft, based on 372 wells with recorded depths in the state ISGS database. Half of all wells fall between 100 ft and 260 ft; 90% are shallower than 390 ft. Wells drilled since 2016 have a median depth of 276 ft.
How much does it cost to drill a well in Williamson County?
Applying published per-foot rates to the local median depth of 276 ft: drilling and casing alone typically runs $6,900–$17,940; a complete system including pump, pressure tank, and hookup typically runs $16,560–$27,600. Actual quotes depend on site access, geology, and casing requirements.
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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 248 pump tests. A typical household needs 5–10 gpm.
Pull every recorded well near a Williamson County address — $29
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, Leonard Ralph | 12 |
| Beanland, Glen | 11 |
| Beanland, John R. | 1 |
See every driller with wells on record in Williamson 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.