The drilling companies that have actually completed wells within 15 miles of Ulm, ranked by how many, from the well logs each company filed with the state. Ulm is in Cascade County.
In the last five years, 251 wells were completed within 15 miles of Ulm, by 15 different drilling companies. The most active was Aquasource Drilling Llc, with 94. The three busiest companies drilled 65 percent of them, so work here is concentrated among a few outfits.
| Company | Wells within 15 mi | Latest | Closest well |
|---|---|---|---|
| Aquasource Drilling Llc | 94 | 2026 | 1 mi |
| Boland Drilling | 37 | 2026 | 2 mi |
| Aaaa Water Well Drilling Inc | 30 | 2026 | 4 mi |
| 406 Water Wells, Llc | 24 | 2026 | 5 mi |
| Aquasource Inc Llc | 14 | 2023 | 2 mi |
| Hl Ventures Llc | 13 | 2024 | 7 mi |
| Western Water Wells | 9 | 2025 | 2 mi |
| Pat Byrne Drilling Inc | 8 | 2026 | 3 mi |
| Montana Salinity Control Association | 6 | 2026 | 11 mi |
| Cascade Drilling Lp | 4 | 2023 | 14 mi |
| Okeefe Drilling Co | 3 | 2025 | 15 mi |
| Olympus Technical Services | 3 | 2025 | 11 mi |
| Corveau Drilling | 2 | 2022 | 4 mi |
| Thomas, Dean, And Hoskins, Inc. | 1 | 2025 | 12 mi |
| Vidic Drilling Inc | 1 | 2024 | 13 mi |
Source: MBMG Ground Water Information Center well logs completed 2021 to 2026, counted by distance from the center of Ulm. Only logs that name a company are ranked. This is a count of public records, not a recommendation; see how to check a driller before you hire. For depth, yield and water level near a specific property, see Montana Water Report.
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