All 25 drilling companies that have filed a well log in Lewis and Clark County in the last ten years, 21 of them in the last five, ranked by recent work.
| Company | Last 5 yrs | Last 10 yrs | All time | Latest | First on file |
|---|---|---|---|---|---|
| H & L Drilling Inc | 371 | 891 | 4,434 | 2026 | 1900 |
| A-10 Drilling | 368 | 699 | 1,252 | 2026 | 1955 |
| Western Water Wells | 327 | 459 | 459 | 2026 | 2016 |
| Aaaa Water Well Drilling Inc | 103 | 179 | 316 | 2026 | 2006 |
| Lindsay Drilling Co Inc | 86 | 159 | 3,719 | 2026 | 1864 |
| 406 Water Wells, Llc | 57 | 57 | 57 | 2026 | 2025 |
| Okeefe Drilling Co | 54 | 81 | 265 | 2026 | 1970 |
| Aquasource Drilling Llc | 42 | 51 | 59 | 2026 | 2007 |
| Yellow Jacket Drilling Services Llc | 37 | 37 | 37 | 2024 | 2023 |
| Hl Ventures Llc | 36 | 38 | 38 | 2025 | 2019 |
| Aquasource Inc Llc | 12 | 16 | 34 | 2021 | 1999 |
| Mt Poverty Water Well Drilling | 6 | 112 | 268 | 2022 | 1998 |
| Boland Drilling | 4 | 17 | 97 | 2025 | 1988 |
| Pioneer Technical Services Inc | 3 | 5 | 6 | 2023 | 2009 |
| West Central Environmental Consultants | 2 | 2 | 2 | 2024 | 2024 |
| Sk Geotechnical Co | 2 | 2 | 10 | 2022 | 2004 |
| Ak Drilling Inc | 1 | 6 | 16 | 2025 | 2003 |
| Red Tiger Drilling | 1 | 1 | 18 | 2023 | 1983 |
| Western Water Works Inc | 1 | 1 | 1 | 2021 | 2021 |
| Jeromes Drilling Co | 1 | 1 | 13 | 2023 | 1976 |
| Inberg-Miller Engineers | 1 | 1 | 1 | 2022 | 2022 |
| Cascade Drilling Lp | 0 | 48 | 67 | 2020 | 2014 |
| Mt Dept Of Transportation | 0 | 27 | 172 | 2017 | 1959 |
| Hydrometrics Inc | 0 | 3 | 72 | 2016 | 1987 |
| Poverty Drilling | 0 | 2 | 279 | 2019 | 1977 |
Source: MBMG Ground Water Information Center well logs. A count of public records, not a recommendation. How to check a driller. Depth and yield for Lewis and Clark County: Montana Water Report.
East Helena Helena York Spokane Creek Rimini Marysville Augusta Lincoln Craig Wolf Creek
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