South Dakota Well Data › Sully County
Sully County, South Dakota: well depth, water level & drilling cost
✓ 413 SD DANR records · verified 2026-10-19
Pull every recorded well near a Sully County address — $49
How deep are wells in Sully County, South Dakota?
The median drilled well depth in Sully County is 80 ft, based on 413 wells with recorded depths in the state SD DANR database. Half of all wells fall between 44 ft and 1,620 ft; 90% are shallower than 2,120 ft. Wells drilled since 2016 have a median depth of 67 ft.
How much does it cost to drill a well in Sully County?
Applying published per-foot rates to the local median depth of 80 ft: drilling and casing alone typically runs $2,000–$5,200; a complete system including pump, pressure tank, and hookup typically runs $4,800–$8,000. Actual quotes depend on site access, geology, and casing requirements.
Drilled depth distribution
Who drills wells in Sully County?
Companies by number of wells completed in this county, per the completion reports South Dakota drillers file with DANR.
| Driller | Wells since 2016 |
|---|---|
| STRETCH'S WELL SERVICE, INC. | 22 |
| PULLMAN WELL DRILLING | 3 |
See every driller with wells on record in Sully County, ranked →
Get quotes from local drillers
See every recorded well near any address — depths, owners, drillers, original state well records — in a one-time report.
Free lookup Property report — $49Free. Goes to licensed drillers working Sully County.
Well records by ZIP code in Sully County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Onida (57564) — 174 wells, median 66 ft
- Agar (57520) — 59 wells, median 1,620 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.