Montana water data · Zip Code in Lincoln County
ZIP 59930: well depth, groundwater and water rights
What the public record says about water in ZIP code 59930: 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 1,574 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)
Wells on record
773
8.3 per sq mi
Median well depth
284 ft
half of wells 185–420 ft
Median static water level
105 ft
728 measurements
Median tested yield
20 gpm
751 pump tests
Well depth
How deep are wells in ZIP 59930?
Of 765 wells with a recorded total depth, the median is 284 feet. Half were drilled between 185 and 420 feet; one in ten went deeper than 550 feet and one in ten found water shallower than 120 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
105 ft
median depth to water at rest · half between 56 and 185 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 30 gpm
2% of tested wells produced under 5 gallons per minute and 58% 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 59930
171 wells have been completed here since 2016, 8 of them in the last twelve months. The newest log on file was completed July 10, 2026. Records run back to 1908.
What the wells are for
- Domestic740
- Stockwater19
- Public Water Supply12
- Irrigation8
- Commercial2
How they were drilled
- Rotary647
- Air Rotary47
- Forward Rotary37
- Unknown8
Drillers filing well logs in ZIP 59930
- Davis Brothers Drilling70 since 2016 · 2026
- Post Pump And Drilling Llc53 since 2016 · 2023
- Joe Liss Water Wells, Inc.14 since 2016 · 2017
- Post Pump & Drilling Llc13 since 2016 · 2023
- Water Resource Services11 since 2016 · 2025
- Alto Well And Pump, Llc4 since 2016 · 2025
- Stinger Drilling3 since 2016 · 2023
- Certified Well And Pump1 since 2016 · 2021
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 59930
Montana DNRC lists 798 water rights with a point of diversion inside this area: 643 groundwater and 155 surface water, 754 of them active. The median priority date is 2000, and the oldest claim dates to 1880.
Types of right
- Ground Water Certificate587
- Statement Of Claim140
- Provisional Permit63
- Exempt Notice8
Purposes
- Domestic297
- Domestic; Lawn And Garden143
- Irrigation76
- Stock64
- Domestic; Stock37
DNRC basins
- 76D798
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 59930 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.
- Belt Supergroup505 wells · 80% · median 325 ft
- Glacial Drift54 wells · 9% · median 110 ft
- Ravalli Group30 wells · 5% · median 205 ft
- Siyeh Limestone (of Piegan Group)27 wells · 4% · median 245 ft
- Alluvium (quaternary)7 wells · 1% · median 21 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 59930
Petroleum releases
1
0 open · 1 resolved
Superfund program sites
0
none on the National Priorities List
Registered tank facilities
2
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 2014. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.