Montana water data · Community in Missoula County
Seeley Lake: well depth, groundwater and water rights
What the public record says about water in Seeley Lake: 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 1,585 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (place boundary)
Wells on record
804
65.6 per sq mi
Median well depth
140 ft
half of wells 99–220 ft
Median static water level
40 ft
699 measurements
Median tested yield
12 gpm
741 pump tests
Well depth
How deep are wells in Seeley Lake?
Of 776 wells with a recorded total depth, the median is 140 feet. Half were drilled between 99 and 220 feet; one in ten went deeper than 306 feet and one in ten found water shallower than 68 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
40 ft
median depth to water at rest · half between 24 and 70 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
12 gpm
median tested yield · half between 6 and 20 gpm
12% of tested wells produced under 5 gallons per minute and 29% 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 Seeley Lake
123 wells have been completed here since 2016, 7 of them in the last twelve months. The newest log on file was completed June 24, 2026. Records run back to 1925.
What the wells are for
- Domestic727
- Monitoring16
- Irrigation5
- Public Water Supply5
- Unused3
How they were drilled
- Rotary581
- Cable62
- Forward Rotary62
- Cable Tool5
Drillers filing well logs in Seeley Lake
- Jeromes Drilling Co71 since 2016 · 2024
- Western Montana Drilling Co.17 since 2016 · 2026
- Western Montana Drilling Company12 since 2016 · 2024
- Heimark Drilling5 since 2016 · 2025
- Camp Well Drilling And Pump Service4 since 2016 · 2025
- Western Drilling Co.4 since 2016 · 2019
- Boland Drilling3 since 2016 · 2022
- Blackfoot Well Drilling & Pump Service Inc2 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 Seeley Lake
Montana DNRC lists 766 water rights with a point of diversion inside this area: 646 groundwater and 120 surface water, 734 of them active. The median priority date is 1995, and the oldest claim dates to 1859.
Types of right
- Ground Water Certificate579
- Statement Of Claim160
- Provisional Permit23
- Exempt Notice3
- Compact1
Purposes
- Domestic468
- Domestic; Lawn And Garden128
- Multiple Domestic34
- Irrigation22
- Stock17
DNRC basins
- 76F762
- 76L1
- 76E1
- 76G1
- 76K1
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 Seeley Lake 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 Supergroup179 wells · 32% · median 190 ft
- Glacial Outwash (pleistocene)156 wells · 27% · median 95 ft
- Alluvium (pleistocene)116 wells · 20% · median 140 ft
- Sediments (tertiary)51 wells · 9% · median 220 ft
- Alluvium (holocene)22 wells · 4% · median 16 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 Seeley Lake
Petroleum releases
8
1 open · 7 resolved
Superfund program sites
0
none on the National Priorities List
Registered tank facilities
7
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 1999. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.