South Dakota Well Data › Union County
Union County, South Dakota: well depth, water level & drilling cost
✓ 852 SD DANR records · verified 2026-10-19
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How deep are wells in Union County, South Dakota?
The median drilled well depth in Union County is 115 ft, based on 849 wells with recorded depths in the state SD DANR database. Half of all wells fall between 85 ft and 216 ft; 90% are shallower than 300 ft. Wells drilled since 2016 have a median depth of 98 ft.
How much does it cost to drill a well in Union County?
Applying published per-foot rates to the local median depth of 115 ft: drilling and casing alone typically runs $2,875–$7,475; a complete system including pump, pressure tank, and hookup typically runs $6,900–$11,500. Actual quotes depend on site access, geology, and casing requirements.
Drilled depth distribution
Who drills wells in Union County?
Companies by number of wells completed in this county, per the completion reports South Dakota drillers file with DANR.
| Driller | Wells since 2016 |
|---|---|
| 4 Boys TT, LLC DBA HEINE ELECTRIC & IRRIGATION | 33 |
| CHRISTENSEN WELL & IRRIGATION, | 25 |
| ALTON WELL | 23 |
| THEIN WELL COMPANY, INC. | 17 |
| SAM WELL COMPANY | 5 |
| GEOTEK ENGINEERING & TESTING | 3 |
| DAVE PUTZKE WELL DRILLING, INC. | 3 |
| SIOUXLAND WELL COMPANY INC. | 2 |
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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.
- Jefferson (57038) — 238 wells, median 120 ft
- Elk Point (57025) — 192 wells, median 112 ft
- Alcester (57001) — 181 wells, median 105 ft
- North Sioux City (57049) — 143 wells, median 102 ft
- Burbank (57010) — 83 wells, median 153 ft
Method: medians computed from SD DANR records (SD DANR NR68 well completion reports, water wells only (monitoring, test-hole, geothermal-loop and dewatering records 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.