⟁ California Well Data field records · 2026 survey

California Well Data › Colusa County

Colusa County, California: well depth, water level & drilling cost

✓ 3,594 DWR records · verified 2026-08-14

245 ftmedian well depth
132 ft–480 fttypical depth range
51 ftmedian static water level
100 gpmmedian yield (846 tests)

How deep are wells in Colusa County, California?

The median drilled well depth in Colusa County is 245 ft, based on 3,584 wells with recorded depths in the state DWR database. Half of all wells fall between 132 ft and 480 ft; 90% are shallower than 724 ft. Wells drilled since 2016 have a median depth of 540 ft.

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

Applying published per-foot rates to the local median depth of 540 ft: drilling and casing alone typically runs $13,500–$35,100; a complete system including pump, pressure tank, and hookup typically runs $32,400–$54,000. Actual quotes depend on site access, geology, and casing requirements.

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What is the static water level in Colusa County?

The median static water level is 51 ft below ground surface (middle half of wells: 22 ft–146 ft), from 375 measurements.

How much water do wells in Colusa County produce?

The median tested yield is 100 gpm (middle half: 40 gpm–1,000 gpm), from 846 pump tests. A typical household needs 5–10 gpm.

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Drilled depth distribution

0–50 ft 327 50–100 ft 298 100–150 ft 422 150–200 ft 385 200–300 ft 662 300–400 ft 385 400–600 ft 458 600+ ft 647

Who drills wells in Colusa County?

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

DrillerWells since 2016
SULLIVAN DRILLING INC221
EATON DRILLING CO LLC38
PARKS WATER RESOURCES29
WELL INDUSTRIES INC10
NOR - CAL PUMP & WELL DRILLING INC9
ROADRUNNER DRILLING & PUMP COMPANY INC7
GLENN CHERRY DRILLING4
CACHE CREEK DRILLING4

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Method: medians computed from DWR records (filed well completion reports, water-supply uses only (destruction, repair and monitoring wells 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.