Illinois Well Data › Carroll County
Carroll County, Illinois: well depth, yield & drilling cost
✓ 1,902 ISGS records · verified 2026-10-12
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How deep are wells in Carroll County, Illinois?
The median drilled well depth in Carroll County is 240 ft, based on 1,859 wells with recorded depths in the state ISGS database. Half of all wells fall between 170 ft and 329 ft; 90% are shallower than 410 ft. Wells drilled since 2016 have a median depth of 298 ft.
How much does it cost to drill a well in Carroll County?
Applying published per-foot rates to the local median depth of 240 ft: drilling and casing alone typically runs $6,000–$15,600; a complete system including pump, pressure tank, and hookup typically runs $14,400–$24,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Carroll County?
Few static water level measurements are recorded for this county.
How much water do wells in Carroll County produce?
The median tested yield is 20 gpm (middle half: 15 gpm–25 gpm), from 1,041 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Carroll 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 |
|---|---|
| Thompson, John J. | 11 |
| Lyons, Larry | 9 |
| White, Matt | 8 |
| Thompson, John | 8 |
| Bull Well Drilling Inc | 5 |
| Stoll, Austen | 4 |
| Shawn N Lyons | 3 |
| Tracy A McConnel | 3 |
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Well records by ZIP code in Carroll County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Pearl City (61062) — 682 wells, median 250 ft
- Lanark (61046) — 407 wells, median 252 ft
- Thomson (61285) — 275 wells, median 120 ft
- Mount Carroll (61053) — 250 wells, median 235 ft
- Savanna (61074) — 240 wells, median 230 ft
- Shannon (61078) — 229 wells, median 265 ft
- Chadwick (61014) — 108 wells, median 272 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.