Best well drillers in San Juan County, Washington
Not a pay-to-play list: these are the 32 drilling companies with wells on record in San Juan County, ranked by wells actually drilled here — 2,986 logged wells in Washington State Department of Ecology well construction reports (records as of 2026-07-28). Every number links back to the public record.
| # | Company | In San Juan Co. since 2016 | All-time in county | Statewide |
|---|---|---|---|---|
| 1 | Jimmy Mauldin | 158 | 496 | 498 |
| 2 | Alfred Mauldin | 103 | 464 | 464 |
| 3 | Mark Sawyer | 34 | 264 | 331 |
| 4 | Stanley Arnott | 33 | 240 | 245 |
| 5 | Justin Martel | 12 | 249 | 249 |
| 6 | Brent Barker | 9 | 9 | 249 |
| 7 | Robert Eagan | 8 | 98 | 98 |
| 8 | Ryan Wilhonen | 2 | 8 | 838 |
| 9 | Self Self | 2 | 8 | 216 |
| 10 | Ralph Riggles | 2 | 2 | 1,881 |
| 11 | Pierce Kiltoff | 1 | 1 | 281 |
| 12 | Eugene Hitt | 1 | 1 | 410 |
| 13 | William Munich | — | 383 | 388 |
| 14 | Daniel Martel | — | 316 | 316 |
| 15 | Robert Powell | — | 177 | 177 |
| 16 | Lynnie Arnott | — | 170 | 171 |
| 17 | David Yenter | — | 43 | 43 |
| 18 | Kenneth Engle | — | 16 | 112 |
| 19 | Arthur Mcmullen | — | 15 | 257 |
| 20 | Lynn Bartholomew | — | 6 | 410 |
| 21 | Randall Holt | — | 5 | 162 |
| 22 | Brannon Hopke | — | 2 | 1,852 |
| 23 | Bill Clothier | — | 2 | 1,700 |
| 24 | NA Unknown | — | 2 | 139 |
| 25 | William Neal Iii | — | 2 | 27 |
| 26 | Rodney Gilseth JR | — | 1 | 183 |
| 27 | Michael Florence | — | 1 | 174 |
| 28 | David Deremer | — | 1 | 614 |
| 29 | Wayne Logsdon | — | 1 | 189 |
| 30 | Herman Lehnart | — | 1 | 87 |
| 31 | William Halbert | — | 1 | 86 |
| 32 | Steve Gilbert | — | 1 | 60 |
Ranked by wells drilled in San Juan County since 2016 (then all-time), from the full Ecology 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 Juan County?
Jimmy Mauldin has drilled the most San Juan County wells in the recent record — 158 since 2016, 496 in the county all-time.
How many well drilling companies work in San Juan County?
32 companies in the Ecology record have drilled wells in San Juan County; 14 of them have drilled somewhere in Washington since 2022. Smaller operators below the record threshold may also serve the area.
How deep is a typical well in San Juan County?
The median drilled depth in San Juan County is 300 ft, based on 3,091 recorded wells. Depths, water levels, and yields are on the San Juan County wells page.
Well depths, static water levels, tested yields, and drilling cost estimates for this county live on the San Juan County wells page.
Free for property owners. We route your request only to licensed drillers who actually file well logs in San Juan County — never sold elsewhere.
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Claim your profileFree to claim · built from Ecology public well-log records.