The drilling companies that have actually completed wells within 15 miles of Ennis, ranked by how many, from the well logs each company filed with the state. Ennis is in Madison County.
In the last five years, 325 wells were completed within 15 miles of Ennis, by 16 different drilling companies. The most active was Graham Drilling Inc, with 114. The three busiest companies drilled 66 percent of them, so work here is concentrated among a few outfits.
| Company | Wells within 15 mi | Latest | Closest well |
|---|---|---|---|
| Graham Drilling Inc | 114 | 2025 | 1 mi |
| Red Tiger Drilling | 59 | 2026 | 0 mi |
| Potts Drilling Inc | 43 | 2026 | 1 mi |
| Old Town Drilling | 29 | 2026 | 1 mi |
| Van Dyken Drilling Inc | 21 | 2026 | 1 mi |
| Graham Drilling & Pumps | 16 | 2026 | 2 mi |
| Diamond M Drilling Inc | 12 | 2025 | 2 mi |
| Excel Pump And Well Inc. | 12 | 2025 | 1 mi |
| Vidic Drilling Inc | 5 | 2026 | 2 mi |
| Ak Drilling Inc | 3 | 2026 | 6 mi |
| Bridger Drilling Inc | 3 | 2022 | 5 mi |
| Pioneer Technical Services Inc | 3 | 2025 | 0 mi |
| A-10 Drilling | 2 | 2026 | 9 mi |
| Bertram Drilling Inc | 1 | 2024 | 13 mi |
| Boland Drilling | 1 | 2023 | 11 mi |
| Western Water Wells | 1 | 2022 | 11 mi |
Source: MBMG Ground Water Information Center well logs completed 2021 to 2026, counted by distance from the center of Ennis. 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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