Ohio Well Data › Union County
Union County, Ohio: well depth, water level & drilling cost
✓ 7,632 ODNR records · verified 2026-09-28
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How deep are wells in Union County, Ohio?
The median drilled well depth in Union County is 100 ft, based on 7,629 wells with recorded depths in the state ODNR database. Half of all wells fall between 74 ft and 138 ft; 90% are shallower than 180 ft. Wells drilled since 2016 have a median depth of 100 ft.
How much does it cost to drill a well in Union County?
Applying published per-foot rates to the local median depth of 100 ft: drilling and casing alone typically runs $2,500–$6,500; a complete system including pump, pressure tank, and hookup typically runs $6,000–$10,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Union County?
The median static water level is 27 ft below ground surface (middle half of wells: 17 ft–43 ft), from 7,446 measurements.
How much water do wells in Union County produce?
The median tested yield is 15 gpm (middle half: 12 gpm–20 gpm), from 6,969 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Union County?
Companies by number of wells completed in this county since 2016, per filed well logs (ODNR Division of Geological Survey).
| Driller | Wells since 2016 |
|---|---|
| SEISMIC DRILLING CO INC | 404 |
| BUSHONG DRILLING LLC | 187 |
| CENTRAL SOFT WATER | 132 |
| EATON WELL DRILLING INC | 104 |
| BAPST INC | 94 |
| ELLSWORTH WELL & PUMP | 44 |
| UNDERHILL WELL & PUMP CO LLC | 28 |
| STAGE INC (DBA R C BARRY) | 19 |
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Well records by ZIP code in Union County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Marysville (43040) — 2,183 wells, median 112 ft
- Plain City (43064) — 1,570 wells, median 101 ft
- Richwood (43344) — 915 wells, median 75 ft
- Raymond (43067) — 580 wells, median 105 ft
- West Mansfield (43358) — 499 wells, median 93 ft
- Unionville Center (43077) — 457 wells, median 93 ft
- Milford Center (43045) — 365 wells, median 160 ft
- Magnetic Springs (43036) — 313 wells, median 62 ft
- Marysville (43041) — 300 wells, median 153 ft
- Broadway (43007) — 280 wells, median 80 ft
Method: medians computed from ODNR records (water-supply wells only (domestic, public/municipal, commercial, industrial, agricultural/irrigation, fire protection) — monitoring, test/boring, heat-pump, injection, abandoned/sealed and unclassified wells 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.