South Dakota Well Data › Union County

Union County, South Dakota: well depth, water level & drilling cost

Name: Union County, South Dakota water well statistics
Creator: South Dakota Well Data
License: https://creativecommons.org/licenses/by/4.0/

✓ 852 SD DANR records · verified 2026-08-24

115 ftmedian well depth

85 ft–216 fttypical depth range

23 ftmedian static water level

98 ftmedian depth since 2016

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 98 ft: drilling and casing alone typically runs $2,450–$6,370; a complete system including pump, pressure tank, and hookup typically runs $5,880–$9,800. Actual quotes depend on site access, geology, and casing requirements.

Get quotes from drillers active in Union County

Free for property owners. We route your request only to licensed drillers who actually file well logs in Union County — never sold elsewhere.

Pull every recorded well near a Union County address — $29

Drilled depth distribution

0–50 ft 107 50–100 ft 181 100–150 ft 267 150–200 ft 57 200–300 ft 145 300–400 ft 46 400–600 ft 38 600+ ft 8

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

See every driller with wells on record in Union County, ranked →

Get quotes from local drillers

Looking at a specific property in Union County?

See every recorded well near any address — depths, owners, drillers, original state well records — in a one-time report.

Free lookup Property report — $29

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.