⟁ California Well Data field records · 2026 survey

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Gregg Drilling LLC

Recorded as the driller on 564 water wells across 36 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Alameda County. Well-log records span 2003–2026.

564wells on record
381since 2022
36counties served
45 ftmedian depth

Counties served

Wells drilled by Gregg Drilling LLC, by county, across the full record.

CountyWells drilled
Alameda County 129
Santa Clara County 115
Los Angeles County 63
San Mateo County 42
Contra Costa County 30
San Luis Obispo County 19
Humboldt County 18
Orange County 15
Shasta County 15
Marin County 13
Nevada County 12
San Bernardino County 9
Show all 36 counties
Solano County 9
Merced County 7
Sonoma County 7
Sacramento County 7
Riverside County 6
San Joaquin County 6
Kern County 5
Placer County 5
Fresno County 4
Madera County 4
Calaveras County 4
Lake County 4
Monterey County 3
Tulare County 2
San Francisco County 2
San Diego County 1
Santa Barbara County 1
Inyo County 1
San Benito County 1
El Dorado County 1
Yuba County 1
Sutter County 1
Mendocino County 1
Del Norte County 1

Well characteristics

Across the wells Gregg Drilling LLC has drilled, the median depth is 45 ft (middle half 25 ft–70 ft), median tested yield 2 gpm, and median static water level 16 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Gregg Drilling LLC, straight from the public DWR record:

"Records span 2003–2026" refers to the earliest and latest well logs attributed to this company in the DWR database — the state digitized older paper logs, so the first date is the oldest record on file, not necessarily the company's founding year.

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