Diamond Core Drilling Inc.
Recorded as the driller on 480 water wells across 14 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Shasta County. Well-log records span 1984–2026.
Counties served
Wells drilled by Diamond Core Drilling Inc., by county, across the full record.
| County | Wells drilled |
|---|---|
| Shasta County | 258 |
| Trinity County | 54 |
| Siskiyou County | 48 |
| Tehama County | 38 |
| Merced County | 26 |
| Sacramento County | 24 |
| Sutter County | 15 |
| Yuba County | 8 |
| Plumas County | 3 |
| Nevada County | 2 |
| Fresno County | 1 |
| Sierra County | 1 |
Show all 14 counties
| Mendocino County | 1 |
| Butte County | 1 |
Well characteristics
Across the wells Diamond Core Drilling Inc. has drilled, the median depth is 200 ft (middle half 140 ft–300 ft), median tested yield 37 gpm, and median static water level 62 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Diamond Core Drilling Inc., straight from the public DWR record:
"Records span 1984–2026" 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.
Free. Goes to licensed drillers working Shasta County, including Diamond Core Drilling Inc..
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