Illinois Well Data › Stephenson County
Stephenson County, Illinois: well depth, yield & drilling cost
✓ 3,389 ISGS records · verified 2026-10-12
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How deep are wells in Stephenson County, Illinois?
The median drilled well depth in Stephenson County is 185 ft, based on 3,343 wells with recorded depths in the state ISGS database. Half of all wells fall between 145 ft and 225 ft; 90% are shallower than 290 ft. Wells drilled since 2016 have a median depth of 200 ft.
How much does it cost to drill a well in Stephenson County?
Applying published per-foot rates to the local median depth of 185 ft: drilling and casing alone typically runs $4,625–$12,025; a complete system including pump, pressure tank, and hookup typically runs $11,100–$18,500. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Stephenson County?
Few static water level measurements are recorded for this county.
How much water do wells in Stephenson County produce?
The median tested yield is 20 gpm (middle half: 15 gpm–25 gpm), from 2,506 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Stephenson 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. | 22 |
| Deppe, Edward M. | 12 |
| Lyons, Larry | 8 |
| Niffenegger Well & Pump | 8 |
| Thompson, John | 8 |
| Municipal Well & Pump, Inc. | 5 |
| Schuur, Bill | 5 |
| Bull Well Drilling Inc | 3 |
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Well records by ZIP code in Stephenson County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Freeport (61032) — 851 wells, median 180 ft
- Eleroy (61027) — 274 wells, median 180 ft
- Cedarville (61013) — 254 wells, median 180 ft
- Ridott (61067) — 237 wells, median 180 ft
- Rock City (61070) — 216 wells, median 185 ft
- Davis (61019) — 208 wells, median 194 ft
- Lena (61048) — 201 wells, median 183 ft
- Orangeville (61060) — 196 wells, median 180 ft
- Dakota (61018) — 189 wells, median 200 ft
- Baileyville (61007) — 184 wells, median 215 ft
- Mc Connell (61050) — 155 wells, median 170 ft
- German Valley (61039) — 115 wells, median 173 ft
- Winslow (61089) — 72 wells, median 177 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.