Oregon Well Data › Benton County
Benton County, Oregon: well depth, water level & drilling cost
✓ 10,897 OWRD records · verified 2026-09-28
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How deep are wells in Benton County, Oregon?
The median drilled well depth in Benton County is 120 ft, based on 9,723 wells with recorded depths in the state OWRD database. Half of all wells fall between 60 ft and 225 ft; 90% are shallower than 355 ft. Wells drilled since 2016 have a median depth of 140 ft.
How much does it cost to drill a well in Benton County?
Applying published per-foot rates to the local median depth of 140 ft: drilling and casing alone typically runs $3,500–$9,100; a complete system including pump, pressure tank, and hookup typically runs $8,400–$14,000. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Benton County?
The median static water level is 22 ft below ground surface (middle half of wells: 12 ft–42 ft), from 9,696 measurements.
How much water do wells in Benton County produce?
The median tested yield is 15 gpm (middle half: 7 gpm–30 gpm), from 9,129 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Benton County?
Companies by number of wells completed in this county since 2016, per filed well logs (Oregon Water Resources Department).
| Driller | Wells since 2016 |
|---|---|
| CORVALLIS DRILLING CO INC | 235 |
| JONES WELL DRILLING CO INC | 88 |
| MID VALLEY DRILLING INC | 71 |
| WEST COAST WELL DRILLING LLC | 70 |
| NUGENT DRILLING CO LLC | 30 |
| M & M WELL DRILLING | 29 |
| SIPPEL WELL DRILLING INC | 26 |
| NUGENT DRILLING CO | 22 |
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Well records by ZIP code in Benton County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Corvallis (97330) — 2,712 wells, median 115 ft
- Philomath (97370) — 2,454 wells, median 167 ft
- Albany (97321) — 2,260 wells, median 60 ft
- Monroe (97456) — 2,077 wells, median 150 ft
- Corvallis (97333) — 1,142 wells, median 57 ft
- Blodgett (97326) — 561 wells, median 120 ft
- Alsea (97324) — 426 wells, median 100 ft
- Corvallis (97331) — 241 wells, median 119 ft
Method: medians computed from OWRD records (water wells only (log type 'Water Well' — monitoring wells and geotechnical 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.