Clear Heart Drilling Inc.
Recorded as the driller on 694 water wells across 15 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Sonoma County. Well-log records span 1981–2025.
Counties served
Wells drilled by Clear Heart Drilling Inc., by county, across the full record.
| County | Wells drilled |
|---|---|
| Sonoma County | 423 |
| Mendocino County | 57 |
| Alameda County | 54 |
| Marin County | 40 |
| Santa Clara County | 36 |
| Contra Costa County | 27 |
| Napa County | 19 |
| San Joaquin County | 16 |
| Yuba County | 8 |
| Humboldt County | 7 |
| Lake County | 2 |
| Solano County | 2 |
…and 3 more California counties.
Well characteristics
Across the wells Clear Heart Drilling Inc. has drilled, the median depth is 25 ft (middle half 18 ft–68 ft), median tested yield 7 gpm, and median static water level 16 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
"Records span 1981–2025" 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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