Gregg Drilling & Testing Inc.
Recorded as the driller on 4,828 water wells across 41 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Santa Clara County. Well-log records span 1954–7012.
Counties served
Wells drilled by Gregg Drilling & Testing Inc., by county, across the full record.
| County | Wells drilled |
|---|---|
| Santa Clara County | 1,828 |
| Alameda County | 573 |
| Contra Costa County | 521 |
| San Mateo County | 271 |
| Los Angeles County | 266 |
| Solano County | 230 |
| Sacramento County | 173 |
| Sonoma County | 126 |
| San Joaquin County | 90 |
| Fresno County | 73 |
| San Diego County | 53 |
| Santa Cruz County | 52 |
…and 29 more California counties.
Well characteristics
Across the wells Gregg Drilling & Testing Inc. has drilled, the median depth is 34 ft (middle half 20 ft–58 ft), median tested yield 18 gpm, and median static water level 18 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
"Records span 1954–7012" 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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