Montana water data · Zip Code in Lake County
ZIP 59931: well depth, groundwater and water rights
What the public record says about water in ZIP code 59931: 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 599 public records from MBMG GWIC, Montana DNRC, EPA UST Finder, US Census (ZIP Code Tabulation Area)
Wells on record
219
7.7 per sq mi
Median well depth
292 ft
half of wells 200–440 ft
Median static water level
65 ft
198 measurements
Median tested yield
20 gpm
211 pump tests
Well depth
How deep are wells in ZIP 59931?
Of 214 wells with a recorded total depth, the median is 292 feet. Half were drilled between 200 and 440 feet; one in ten went deeper than 641 feet and one in ten found water shallower than 141 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
65 ft
median depth to water at rest · half between 31 and 132 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
5% of tested wells produced under 5 gallons per minute and 56% 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 59931
71 wells have been completed here since 2016, 5 of them in the last twelve months. The newest log on file was completed June 30, 2026. Records run back to 1915.
What the wells are for
- Domestic204
- Irrigation33
- Stockwater17
- Public Water Supply5
- Fire Protection2
How they were drilled
- Rotary153
- Forward Rotary24
- Air Rotary15
- Rotary Bored3
Drillers filing well logs in ZIP 59931
- Allwest Drilling Inc29 since 2016 · 2024
- Glazier Drilling8 since 2016 · 2025
- Oh Well Drilling And Pump7 since 2016 · 2026
- Ace Drilling7 since 2016 · 2025
- Billmayer Drilling5 since 2016 · 2026
- Chambers Drilling Company3 since 2016 · 2025
- Okeefe Drilling Co2 since 2016 · 2025
- Liberty Drilling & Pump Co22 all-time · 2002
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 59931
Montana DNRC lists 377 water rights with a point of diversion inside this area: 170 groundwater and 207 surface water, 351 of them active. The median priority date is 1976, and the oldest claim dates to 1893.
Types of right
- Statement Of Claim176
- Ground Water Certificate125
- Provisional Permit63
- Exempt Notice10
- Registration Certificate2
Purposes
- Domestic153
- Multiple Domestic50
- Domestic; Lawn And Garden38
- Lawn And Garden30
- Stock27
DNRC basins
- 76LJ377
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 59931 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.
- Middle Belt Carbonate40 wells · 44% · median 238 ft
- Ravalli Group24 wells · 27% · median 272 ft
- Belt Supergroup19 wells · 21% · median 225 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 59931
Petroleum releases
0
0 open · 0 resolved
Superfund program sites
0
none on the National Priorities List
Registered tank facilities
3
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. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.