⟁ Oregon Well Data field records · 2026 survey

Oregon Well Data › Gilliam County

Gilliam County, Oregon: well depth, water level & drilling cost

✓ 368 OWRD records · verified 2026-06-30

375 ftmedian well depth
200 ft–605 fttypical depth range
127 ftmedian static water level
50 gpmmedian yield (312 tests)

How deep are wells in Gilliam County, Oregon?

The median drilled well depth in Gilliam County is 375 ft, based on 340 wells with recorded depths in the state OWRD database. Half of all wells fall between 200 ft and 605 ft; 90% are shallower than 801 ft. Wells drilled since 2016 have a median depth of 367 ft.

How much does it cost to drill a well in Gilliam County?

Applying published per-foot rates to the local median depth of 367 ft: drilling and casing alone typically runs $9,175–$23,855; a complete system including pump, pressure tank, and hookup typically runs $22,020–$36,700. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Gilliam County?

The median static water level is 127 ft below ground surface (middle half of wells: 36 ft–341 ft), from 334 measurements.

How much water do wells in Gilliam County produce?

The median tested yield is 50 gpm (middle half: 20 gpm–200 gpm), from 312 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 7 50–100 ft 23 100–150 ft 23 150–200 ft 26 200–300 ft 49 300–400 ft 53 400–600 ft 71 600+ ft 88

Who drills wells in Gilliam County?

Companies by number of wells completed in this county since 2016, per filed well logs (Oregon Water Resources Department).

DrillerWells since 2016
ZOLLMAN'S LARRY BURD WELL DRILLING LLC18
COURTNEY WELL DRILLING, LLC3
OREGON TRAIL WELL SERVICE LLC2
AIKEN WELL DRILLING INC.2
CARPENTER DRILLING INC2
M-K DRILLING CO1
BLUE STAR ENTERPRISES NW INC1
M-K WATERWELL DRILLING INC1

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Looking at a specific property in Gilliam County?

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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.