Illinois Well Data › Rock Island County
Rock Island County, Illinois: well depth, yield & drilling cost
✓ 4,264 ISGS records · verified 2026-10-12
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How deep are wells in Rock Island County, Illinois?
The median drilled well depth in Rock Island County is 222 ft, based on 4,185 wells with recorded depths in the state ISGS database. Half of all wells fall between 140 ft and 400 ft; 90% are shallower than 475 ft. Wells drilled since 2016 have a median depth of 270 ft.
How much does it cost to drill a well in Rock Island County?
Applying published per-foot rates to the local median depth of 270 ft: drilling and casing alone typically runs $6,750–$17,550; a complete system including pump, pressure tank, and hookup typically runs $16,200–$27,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Rock Island County?
Few static water level measurements are recorded for this county.
How much water do wells in Rock Island County produce?
The median tested yield is 25 gpm (middle half: 15 gpm–40 gpm), from 2,643 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Rock Island 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 |
|---|---|
| White, Matt | 71 |
| Stoll, Austen | 39 |
| Gelement, Val | 39 |
| Allen, Joseph | 39 |
| Gingerich, Corwin | 18 |
| Harvey, Lucius | 12 |
| Henry, John | 6 |
| Meyer, Seth | 4 |
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Well records by ZIP code in Rock Island County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Milan (61264) — 555 wells, median 344 ft
- Coal Valley (61240) — 486 wells, median 304 ft
- Andalusia (61232) — 341 wells, median 380 ft
- Hillsdale (61257) — 341 wells, median 140 ft
- Cordova (61242) — 319 wells, median 87 ft
- Moline (61265) — 310 wells, median 162 ft
- Illinois City (61259) — 307 wells, median 440 ft
- Port Byron (61275) — 278 wells, median 178 ft
- Rapids City (61278) — 250 wells, median 204 ft
- Hampton (61256) — 176 wells, median 140 ft
- Reynolds (61279) — 170 wells, median 455 ft
- Carbon Cliff (61239) — 167 wells, median 240 ft
- Barstow (61236) — 149 wells, median 170 ft
- Taylor Ridge (61284) — 141 wells, median 475 ft
- Buffalo Prairie (61237) — 126 wells, median 495 ft
- Rock Island (61201) — 118 wells, median 180 ft
- Silvis (61282) — 55 wells, median 308 ft
- East Moline (61244) — 50 wells, median 200 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.