Montana water data · Zip Code in Dawson County
ZIP 59330: well depth, groundwater and water rights
What the public record says about water in ZIP code 59330: 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 5,177 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)
Wells on record
2,490
2.5 per sq mi
Median well depth
73 ft
half of wells 29–153 ft
Median static water level
38 ft
1,517 measurements
Median tested yield
10 gpm
1,463 pump tests
Well depth
How deep are wells in ZIP 59330?
Of 2,296 wells with a recorded total depth, the median is 73 feet. Half were drilled between 29 and 153 feet; one in ten went deeper than 300 feet and one in ten found water shallower than 16 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
38 ft
median depth to water at rest · half between 19 and 76 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
10 gpm
median tested yield · half between 7 and 20 gpm
10% of tested wells produced under 5 gallons per minute and 30% 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 ZIP 59330
278 wells have been completed here since 2016, 3 of them in the last twelve months. The newest log on file was completed April 20, 2026. Records run back to 1884.
What the wells are for
- Stockwater979
- Domestic968
- Monitoring384
- Unused147
- Other76
How they were drilled
- Rotary480
- Bored198
- Cable185
- Forward Rotary178
Drillers filing well logs in ZIP 59330
- Environmental West Exploration68 since 2016 · 2018
- H & H Drilling56 since 2016 · 2024
- Haz Tech Drilling Inc54 since 2016 · 2025
- Cascade Drilling Lp26 since 2016 · 2016
- West Central Environmental Consultants19 since 2016 · 2025
- Hansen Environmental Drilling10 since 2016 · 2026
- Environmental West10 since 2016 · 2018
- Askin Drilling9 since 2016 · 2026
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 ZIP 59330
Montana DNRC lists 2,539 water rights with a point of diversion inside this area: 1,403 groundwater and 1,136 surface water, 2,359 of them active. The median priority date is 1962, and the oldest claim dates to 1880.
Types of right
- Statement Of Claim1,579
- Ground Water Certificate759
- Provisional Permit119
- Stockwater Permit29
- Exempt Notice25
Purposes
- Stock1,351
- Domestic444
- Irrigation254
- Domestic; Stock81
- Wildlife70
DNRC basins
- 42M2,539
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.
Aquifers and geology
What wells in ZIP 59330 draw from
Drillers record the aquifer a well is completed in. The units below account for the wells here that carry an aquifer assignment; the median depth beside each is for wells completed in that unit.
- Hell Creek Formation476 wells · 32% · median 120 ft
- Fox Hills-hell Creek Aquifer267 wells · 18% · median 260 ft
- Fort Union Formation250 wells · 17% · median 110 ft
- Alluvium (quaternary)157 wells · 11% · median 29 ft
- Tongue River Member (of Ft Union Fm.)146 wells · 10% · median 109 ft
Aquifer assignments are the driller's, recorded at completion, and many older logs carry none. Absence of an assignment is not evidence about the geology.
Environmental groundwater screening
Documented environmental sites in ZIP 59330
Petroleum releases
73
19 open · 54 resolved
Superfund program sites
1
none on the National Priorities List
Registered tank facilities
74
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 2025. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.