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Best well drillers in San Benito County, California
Not a pay-to-play list: these are the 94 drilling companies with wells
on record in San Benito County, ranked by wells actually drilled here — 2,180 logged
wells in the California Department of Water Resources (DWR) Well Completion Reports database (records as of 2026-08-14). Every number links back to
the public record.
94companies on record
38active since 2022
2,180wells in county record
| # | Company | In San Benito Co. since 2016 | All-time in county | Statewide |
|---|
| 1 | Guardino Well Drilling Inc. | 89 | 166 | 1,736 |
| 2 | Maggiora Bros Drilling Inc. | 73 | 425 | 4,674 |
| 3 | Maier & Dougherty Pump & Supply Inc. | 25 | 29 | 241 |
| 4 | American Construction And Supply Inc. | 20 | 23 | 1,685 |
| 5 | Eaton Drilling Co. LLC | 14 | 40 | 3,793 |
| 6 | Granite Drilling Company | 14 | 25 | 476 |
| 7 | Fred Ash & Sons Lynch Pump Co. | 11 | 24 | 118 |
| 8 | DE LA Grange & Sons Inc. | 9 | 81 | 263 |
| 9 | Corrpro Companies Inc. | 8 | 8 | 737 |
| 10 | Pacific Coast Well Drilling Inc. | 6 | 8 | 337 |
| 11 | Farwest Corrosion Control Company | 4 | 4 | 2,649 |
| 12 | H & B Drilling And Sons LLC | 4 | 4 | 414 |
| 13 | Chappell Pump & Supply Inc. | 2 | 113 | 927 |
| 14 | Salinas Pump Company | 2 | 86 | 712 |
| 15 | Myers Well Drilling Inc. | 2 | 3 | 763 |
| 16 | Gregg Drilling & Testing Inc. | 1 | 17 | 4,828 |
| 17 | Gregg Drilling LLC | 1 | 1 | 558 |
| 18 | A B C Liovin Drilling Inc. | 1 | 1 | 1,281 |
| 19 | Well Industries Inc. | 1 | 1 | 558 |
| 20 | Pro-H20 Drilling And Pump Company | 1 | 1 | 39 |
| 21 | Rottman Drilling Co. | 1 | 1 | 1,331 |
| 22 | Cullum Systems Incorporated | — | 183 | 277 |
| 23 | Valley Pump & Drilling Co. | — | 161 | 475 |
| 24 | John A Brandt | — | 100 | 143 |
| 25 | C F Dougherty | — | 74 | 685 |
| 26 | C & N Pump & Well Co. | — | 63 | 697 |
| 27 | Big Valley Drilling | — | 60 | 294 |
| 28 | Signal Drilling Company | — | 51 | 8,301 |
| 29 | Fred Ash & Sons | — | 51 | 1,217 |
| 30 | Cullum Drilling & Pump Service | — | 34 | 40 |
| 31 | Melville L E & Sons Drilling Co. Inc. | — | 33 | 262 |
| 32 | Pioneer Pump And Well Co. | — | 32 | 195 |
| 33 | Freedom General Repair & Pump Shop | — | 22 | 690 |
| 34 | L. E. Melville & Son, Inc. | — | 20 | 80 |
| 35 | Rauch Drilling Company Inc. | — | 19 | 520 |
| 36 | Western Well Drilling Co. Ltd | — | 17 | 842 |
| 37 | Dougherty Pump & Drilling Inc. | — | 15 | 486 |
| 38 | West Coast Drilling | — | 15 | 288 |
| 39 | Cascade Drilling L P | — | 12 | 2,827 |
| 40 | West Hazmat Drilling Corp | — | 11 | 1,702 |
| 41 | P/D Drilling Co. | — | 10 | 25 |
| 42 | Guardino Pump & Well | — | 8 | 482 |
| 43 | Cascade Drilling Inc. - California | — | 8 | 3,167 |
| 44 | Bill Belknap | — | 6 | 2,758 |
| 45 | Acme Drilling Company | — | 6 | 1,439 |
| 46 | Well Tech | — | 6 | 32 |
| 47 | Dos Palos Well Drilling | — | 5 | 788 |
| 48 | Exploration Geoservices Inc. | — | 5 | 956 |
| 49 | J. T. Robinett & Sons | — | 5 | 67 |
| 50 | Dexter Machinery | — | 5 | 53 |
| 51 | Nunes Well Service | — | 5 | 46 |
| 52 | Seanaco Inc. | — | 4 | 327 |
| 53 | Spectrum Exploration Inc. | — | 4 | 307 |
| 54 | Bosearello Enterprises | — | 4 | 30 |
| 55 | Myers Brothers Well Drilling Inc. | — | 3 | 2,865 |
| 56 | Kenneth Roman | — | 3 | 320 |
| 57 | Fred W Porter & Son | — | 3 | 207 |
| 58 | Roy Alsop Pump & Drilling | — | 3 | 173 |
| 59 | Tide Tool & Engr. Co. | — | 3 | 128 |
| 60 | L. Wade Inc. | — | 3 | 93 |
| 61 | Clovis Well Drilling | — | 3 | 77 |
| 62 | Murphy Pump & Supply | — | 3 | 31 |
| 63 | Miller Drilling Co. | — | 2 | 1,775 |
| 64 | Kvilhaug Drilling & Pump Inc. | — | 2 | 327 |
| 65 | Clifford Pump & Well Company | — | 2 | 117 |
| 66 | Levnard T Larson | — | 2 | 681 |
| 67 | Pacific Gas And Electric Company | — | 2 | 264 |
| 68 | Duval's Well Drilling | — | 2 | 167 |
| 69 | Carmel Valley Drilling & Engineering | — | 2 | 111 |
| 70 | Landino Well Drilling | — | 2 | 73 |
| 71 | Precision Drilling Co. | — | 2 | 71 |
| 72 | Sullivan Drilling Inc. | — | 1 | 1,387 |
| 73 | Zim Industries Inc. Dba Bakersfield Well & Pump Co. | — | 1 | 1,716 |
| 74 | Johnson Drilling Co. | — | 1 | 11,865 |
| 75 | Hennings Bros Drilling Co. Inc. | — | 1 | 6,823 |
| 76 | Farm Pump And Irrigation Company Inc. | — | 1 | 451 |
| 77 | Mel Meyer | — | 1 | 101,127 |
| 78 | Grade Drilling Co. | — | 1 | 43 |
| 79 | Hunt Drilling Company Inc. | — | 1 | 1,213 |
| 80 | C O Brose Well Drilling | — | 1 | 698 |
| 81 | Simpson Drilling Company | — | 1 | 644 |
| 82 | Aqua Engineering | — | 1 | 641 |
| 83 | Tom Hunt Drilling Co. | — | 1 | 418 |
| 84 | Raymond Alsop | — | 1 | 397 |
| 85 | Roy V Alsop & Son Inc. | — | 1 | 349 |
| 86 | Datum Exploration Inc. | — | 1 | 223 |
| 87 | Robert Garcia Well & Pump Co. | — | 1 | 192 |
| 88 | Castle Construction & Well Drilling Inc. | — | 1 | 142 |
| 89 | Fred W Porter & Sons | — | 1 | 105 |
| 90 | Ase Drilling Inc. | — | 1 | 82 |
| 91 | Joe Souza | — | 1 | 72 |
| 92 | Roy V Alsop | — | 1 | 46 |
| 93 | Modern Technology Resources Inc. | — | 1 | 44 |
| 94 | S I Guardino | — | 1 | 43 |
Ranked by wells drilled in San Benito County since 2016 (then all-time), from the full DWR
record. A ★ marks a featured sponsor — sponsors must appear in the county record to be listed, and
the ranking below them is never reordered.
Who drills the most wells in San Benito County?
Guardino Well Drilling Inc. has drilled the most San Benito County wells in the recent record — 89 since 2016, 166 in the county all-time.
How many well drilling companies work in San Benito County?
94 companies in the DWR record have drilled wells in San Benito County; 38 of them have drilled somewhere in California since 2022. Smaller operators below the record threshold may also serve the area.
How deep is a typical well in San Benito County?
The median drilled depth in San Benito County is 252 ft, based on 2,508 recorded wells. Depths, water levels, and yields are on the San Benito County wells page.
Well depths, static water levels, tested yields, and drilling cost estimates for this county live on
the San Benito County wells page.
Drill in San Benito County?
If your company is on this list, your profile is free to claim — confirm your details and add your
contact information so San Benito County property owners reach you directly.
Claim your profile Free to claim · built from DWR public well-log records.