Washington Well Data › Cowlitz County
Cowlitz County, Washington: well depth, water level & drilling cost
✓ 8,902 Ecology records · verified 2026-10-02
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How deep are wells in Cowlitz County, Washington?
The median drilled well depth in Cowlitz County is 201 ft, based on 8,858 wells with recorded depths in the state Ecology database. Half of all wells fall between 120 ft and 322 ft; 90% are shallower than 465 ft. Wells drilled since 2016 have a median depth of 202 ft.
How much does it cost to drill a well in Cowlitz County?
Applying published per-foot rates to the local median depth of 202 ft: drilling and casing alone typically runs $5,050–$13,130; a complete system including pump, pressure tank, and hookup typically runs $12,120–$20,200. Actual quotes depend on site access, geology, and casing requirements.
What is the static water level in Cowlitz County?
The median static water level is 73 ft below ground surface (middle half of wells: 33 ft–135 ft), from 2,288 measurements.
How much water do wells in Cowlitz County produce?
The median tested yield is 13 gpm (middle half: 7 gpm–25 gpm), from 1,995 pump tests. A typical household needs 5–10 gpm.
Drilled depth distribution
Who drills wells in Cowlitz County?
Licensed drillers by number of wells completed in this county since 2016, per filed well reports (license roster: Washington Department of Ecology).
| Driller | Wells since 2016 |
|---|---|
| Andrew Orth | 548 |
| Christopher Mcghee | 363 |
| Michael Pitner | 245 |
| Timothy Lapham | 233 |
| Reid Redinger | 135 |
| Willie Williams | 53 |
| Lonnie Bopp | 43 |
| Joel Welsh | 42 |
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Well records by ZIP code in Cowlitz County
Median depth, water level, and yield for each ZIP code with recorded wells.
- Woodland (98674) — 2,291 wells, median 202 ft
- Castle Rock (98611) — 1,997 wells, median 181 ft
- Kelso (98626) — 1,206 wells, median 223 ft
- Longview (98632) — 999 wells, median 235 ft
- Kalama (98625) — 865 wells, median 222 ft
- Carrolls (98609) — 621 wells, median 232 ft
- Ariel (98603) — 510 wells, median 162 ft
- Silverlake (98645) — 404 wells, median 178 ft
- Toutle (98649) — 396 wells, median 140 ft
- Cougar (98616) — 205 wells, median 139 ft
Method: medians computed from Ecology records (water wells only — soil/environmental borings and decommissions 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.