Who is actually doing the work in Yellowstone County, drawn from state well logs and county rosters, and how to get quotes.
Depth is the median of 1,052 water wells completed in Yellowstone County in the last five years. Half fell between 25 and 50 feet. Your parcel can sit well outside that range; nearby wells tell you more than any county figure.
Ranked by wells completed in the county over the last five years, from the well logs each company filed with the state. Recent work matters more than a long history.
| Company | Last 5 yrs | Last 10 yrs | Latest | Median depth |
|---|---|---|---|---|
| American Drilling & Supply | 311 | 637 | 2026 | 40 ft |
| Bertram Drilling Inc | 223 | 333 | 2026 | 33 ft |
| Aaqua Drilling Inc | 183 | 316 | 2026 | 39 ft |
| Haz Tech Drilling Inc | 113 | 237 | 2026 | 20 ft |
| A-1 Drilling | 77 | 173 | 2026 | 38 ft |
| Mayes Drilling Inc | 69 | 171 | 2026 | 40 ft |
| Pioneer Technical Services Inc | 49 | 57 | 2026 | 19 ft |
| Gary'S Drilling Inc. | 42 | 71 | 2025 | 34 ft |
| Cascade Drilling Lp | 28 | 136 | 2024 | 20 ft |
| West Central Environmental Consultants | 24 | 35 | 2026 | 22 ft |
See all 38 drilling companies in Yellowstone County →
Source: MBMG Ground Water Information Center well logs. Counts include only logs that name a company. Companies that have not filed a log here in ten years are left off.
Working near a stream? 310 permits in Yellowstone County →
Billings Laurel Acton Lockwood Huntley Worden Nibbe Broadview
From the Yellowstone County list (list updated March 2026). Call RiverStone Health, Environmental Health Services at 406-256-2770 to confirm anyone's current standing before you hire.
| Company | Contact | Role | Phone |
|---|---|---|---|
| All Design Landscaping & Homes | Justin Wagner | Septic installer | 406-208-0799 |
| Anderson Sewer | Mathew Carter | Septic installer | 406-245-7593 |
| Arrow Septic and Sewer LLC | Carl Openshaw | Septic installer | 406-850-7178 |
| Askin Construction LLC | Dennis Ross | Septic installer | 406-702-1097 |
| B & C Home Builders | Boyce Smith | Septic installer | 406-697-3884 |
| Bangert Construction & Excavation | Loren Bangert | Septic installer | 406-294-5111 |
| Billings Pump & Irrigation | Terry Welborn | Septic installer | 406-245-6139 |
| C Bar J Mechanical | Jared Wicks | Septic installer | 406-698-8932 |
See all 73 on the Yellowstone County septic list →
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