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Montana water data · County

Glacier County: well depth, groundwater and water rights

What the public record says about water in Glacier County: 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 4,580 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder

Wells on record

1,475

1,309 with recorded depth

Median well depth

99 ft

half of wells 38–163 ft

Median static water level

30 ft

1,029 measurements

Median tested yield

13 gpm

961 pump tests

Well depth

How deep are wells in Glacier County?

Of 1,309 wells with a recorded total depth, the median is 99 feet. Half were drilled between 38 and 163 feet; one in ten went deeper than 250 feet and one in ten found water shallower than 19 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.

under 50 ft
30%
50–100 ft
20%
100–200 ft
32%
200–300 ft
11%
300–500 ft
5%
500 ft and deeper
2%

Static water level

30 ft

median depth to water at rest · half between 14 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

13 gpm

median tested yield · half between 5 and 30 gpm

16% of tested wells produced under 5 gallons per minute and 38% 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 Glacier County

187 wells have been completed here since 2016, 19 of them in the last twelve months. The newest log on file was completed August 17, 2026. Records run back to 1900.

What the wells are for

  • Domestic701
  • Stockwater435
  • Monitoring275
  • Public Water Supply71
  • Unused51

How they were drilled

  • Rotary476
  • Forward Rotary74
  • Unknown58
  • Cable50

Drillers filing well logs in Glacier County

  • Aquasource Drilling Llc106 since 2016 · 2025
  • Boland Drilling21 since 2016 · 2025
  • 406 Water Wells, Llc17 since 2016 · 2026
  • Aquasource Inc Llc14 since 2016 · 2022
  • Water & Environmental Technologies12 since 2016 · 2025
  • Hl Ventures Llc11 since 2016 · 2024
  • West Central Environmental Consultants5 since 2016 · 2021
  • Okeefe Drilling Co4 since 2016 · 2025

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 Glacier County

Montana DNRC lists 2,868 water rights in the county: 953 groundwater and 1,905 surface water, 2,055 of them active. The median priority date is 1945, and the oldest claim dates to 1855.

Types of right

  • Statement Of Claim2,123
  • Ground Water Certificate403
  • Compact152
  • Provisional Permit85
  • Reserved Claim69

Purposes

  • Stock1,579
  • Irrigation388
  • Domestic297
  • Instream Flow113
  • Other Purpose84

DNRC basins

  • 41L1,012
  • 40F780
  • 41M572
  • 40T469
  • 41P35

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 Glacier County 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.

  • Two Medicine Formation (of Montana Group)68 wells · 32% · median 130 ft
  • Virgelle Sandstone Member (of Eagle Sandstone)65 wells · 31% · median 271 ft
  • Glacial Drift15 wells · 7% · median 49 ft
  • Eagle Sandstone13 wells · 6% · median 298 ft
  • Alluvium (quaternary)11 wells · 5% · median 42 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 Glacier County

Petroleum releases

78

11 open · 67 resolved

Superfund program sites

4

none on the National Priorities List

Registered tank facilities

155

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 2022. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.