Montana water data · City in Musselshell County
Roundup: well depth, groundwater and water rights
What the public record says about water in Roundup: how deep wells go, where the water table sits, what wells produce, which water rights are on file, and which documented environmental sites are nearby. Area statistics orient you; a property report analyzes the records around one specific parcel.
Updated September 2026 · Based on 153 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (place boundary)
Wells on record
92
71.1 per sq mi
Median well depth
30 ft
half of wells 20–40 ft
Median static water level
16 ft
65 measurements
Median tested yield
20 gpm
12 pump tests
Well depth
How deep are wells in Roundup?
Of 77 wells with a recorded total depth, the median is 30 feet. Half were drilled between 20 and 40 feet; one in ten went deeper than 92 feet and one in ten found water shallower than 20 feet. Depth is set by local geology and position on the landscape, both of which change over short distances, so the spread matters as much as the median.
Static water level
16 ft
median depth to water at rest · half between 12 and 26 ft
The static level is how far below ground the water stands before pumping, measured by the driller at completion. It affects pump setting and operating cost, and it moves with season and with neighbouring use.
Well yield
20 gpm
median tested yield · half between 12 and 89 gpm
0% of tested wells produced under 5 gallons per minute and 50% produced 20 or more. These are short completion tests, not sustained-capacity tests; a household typically needs 3 to 5 gpm with storage.
Drilling activity
Recent well drilling in Roundup
20 wells have been completed here since 2016. The newest log on file was completed May 15, 2025. Records run back to 1919.
What the wells are for
- Monitoring77
- Domestic6
- Other3
- Public Water Supply2
- Irrigation2
How they were drilled
- Hollowstem Auger45
- Hollow Stem Auger19
- Rotary6
- Forward Rotary4
Drillers filing well logs in Roundup
- Haz Tech Drilling Inc15 since 2016 · 2022
- Pioneer Technical Services Inc3 since 2016 · 2023
- Hansen Environmental Drilling10 all-time · 1999
- Sk Geotechnical Co6 all-time · 2012
- Vidic Drilling Inc5 all-time · 1998
- Hunt Drilling4 all-time · 1986
- Haz Tech Drilling Inc.4 all-time · 2010
- Gordon Drilling Inc3 all-time · 1992
Ranked by well logs filed with GWIC, public record only. Not an endorsement, a referral or a paid listing; we have no business relationship with these companies. Verify licensing with the Montana Board of Water Well Contractors before hiring.
Water rights
Water rights on file in Roundup
Montana DNRC lists 13 water rights with a point of diversion inside this area: 10 groundwater and 3 surface water, 11 of them active. The median priority date is 1986, and the oldest claim dates to 1906.
Types of right
- Ground Water Certificate9
- Statement Of Claim3
- Water Reservation1
Purposes
- Commercial3
- Domestic3
- Lawn And Garden2
- Fishery1
- Irrigation1
DNRC basins
- 40C13
Area totals describe the neighbourhood, not any one parcel. Montana publishes no authoritative link between a parcel and a water right; whether a right attaches to a specific property is a property-level question that our reports answer with the DNRC abstract linked.
Environmental groundwater screening
Documented environmental sites in Roundup
Petroleum releases
15
4 open · 11 resolved
Superfund program sites
1
none on the National Priorities List
Registered tank facilities
32
underground storage tanks, current and historical
A documented release or site in the area is not evidence that any particular well is affected. Whether a release reaches a well depends on groundwater flow direction, geology, well depth and construction, the extent of the plume and the cleanup performed. The most recent release reported here dates to 2002. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.