Wisconsin Well Data › Rock County
Rock County, Wisconsin: well depth, water level & drilling cost
✓ 14,048 WI DNR records · verified 2026-09-28
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How deep are wells in Rock County, Wisconsin?
The median drilled well depth in Rock County is 140 ft, based on 6,334 wells with recorded depths in the state WI DNR database. Half of all wells fall between 100 ft and 177 ft; 90% are shallower than 210 ft. Wells drilled since 2016 have a median depth of 143 ft.
How much does it cost to drill a well in Rock County?
Applying published per-foot rates to the local median depth of 143 ft: drilling and casing alone typically runs $3,575–$9,295; a complete system including pump, pressure tank, and hookup typically runs $8,580–$14,300. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Rock County?
The median static water level is 50 ft below ground surface (middle half of wells: 30 ft–80 ft), from 6,260 measurements.
How much water do wells in Rock County produce?
The median tested yield is 20 gpm (middle half: 15 gpm–25 gpm), from 6,176 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Rock County?
Companies by number of wells completed in this county since 2016, per filed well construction reports (Wisconsin DNR).
| Driller | Wells since 2016 |
|---|---|
| SAM'S WELL DRILLING INC | 834 |
| BLOYER WELL & PUMP CO INC | 144 |
| ANHALT WELL DRLG & PUMP INC | 111 |
| SAM'S WELL DRILLING | 89 |
| MARTIN, CHARLES WADE | 32 |
| KRIZAN, KENNETH J | 5 |
| CHARLES WADE MARTIN | 3 |
| LOVELACE WELL DRILLING INC | 3 |
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Well records by ZIP code in Rock County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Edgerton (53534) — 2,593 wells, median 125 ft
- Beloit (53512) — 1,626 wells, median 100 ft
- Milton (53563) — 1,551 wells, median 140 ft
- Janesville (53545) — 1,058 wells, median 161 ft
- Beloit (53511) — 1,043 wells, median 140 ft
- Evansville (53536) — 1,001 wells, median 123 ft
- Clinton (53525) — 814 wells, median 160 ft
- Afton (53501) — 787 wells, median 80 ft
- Janesville (53548) — 692 wells, median 136 ft
- Janesville (53547) — 668 wells, median 152 ft
- Avalon (53505) — 660 wells, median 140 ft
- Janesville (53546) — 460 wells, median 139 ft
- Orfordville (53576) — 432 wells, median 140 ft
- Hanover (53542) — 249 wells, median 140 ft
- Footville (53537) — 220 wells, median 143 ft
Method: medians computed from WI DNR records (drilled water wells (well-construction reports) — geothermal loop/heat-exchange, anode, test and dry holes excluded; depths 0–5,000 ft). Cost estimate applies published per-foot ranges (checked 2026-06-11) to the local median depth — full methodology & sources.