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Montana water data · Zip Code in Cascade County

ZIP 59405: well depth, groundwater and water rights

What the public record says about water in ZIP code 59405: 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 4,490 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

1,810

3.8 per sq mi

Median well depth

160 ft

half of wells 46–335 ft

Median static water level

55 ft

1,427 measurements

Median tested yield

30 gpm

1,287 pump tests

Well depth

How deep are wells in ZIP 59405?

Of 1,642 wells with a recorded total depth, the median is 160 feet. Half were drilled between 46 and 335 feet; one in ten went deeper than 461 feet and one in ten found water shallower than 18 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
25%
50–100 ft
11%
100–200 ft
20%
200–300 ft
13%
300–500 ft
22%
500 ft and deeper
7%

Static water level

55 ft

median depth to water at rest · half between 20 and 140 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

30 gpm

median tested yield · half between 15 and 50 gpm

5% of tested wells produced under 5 gallons per minute and 71% 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 59405

365 wells have been completed here since 2016, 37 of them in the last twelve months. The newest log on file was completed August 3, 2026. Records run back to 1890.

What the wells are for

  • Domestic1,149
  • Monitoring402
  • Stockwater219
  • Irrigation73
  • Public Water Supply28

How they were drilled

  • Rotary696
  • Cable202
  • Solid Stem Auger58
  • Hollowstem Auger52

Drillers filing well logs in ZIP 59405

  • Aquasource Drilling Llc104 since 2016 · 2026
  • Vista Geoscience51 since 2016 · 2023
  • Cascade Drilling Lp49 since 2016 · 2025
  • Boland Drilling46 since 2016 · 2026
  • Aaaa Water Well Drilling Inc32 since 2016 · 2025
  • Aquasource Inc Llc23 since 2016 · 2022
  • Pat Byrne Drilling Inc17 since 2016 · 2026
  • West Central Environmental Consultants9 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 ZIP 59405

Montana DNRC lists 2,450 water rights with a point of diversion inside this area: 1,337 groundwater and 1,113 surface water, 2,321 of them active. The median priority date is 1955, and the oldest claim dates to 1858.

Types of right

  • Statement Of Claim1,468
  • Ground Water Certificate816
  • Provisional Permit73
  • Exempt Notice50
  • Stockwater Permit33

Purposes

  • Stock1,150
  • Domestic510
  • Domestic; Lawn And Garden184
  • Irrigation112
  • Multiple Domestic85

DNRC basins

  • 41J1,103
  • 41QJ1,064
  • 41Q278
  • 41K5

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 59405 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.

  • Kootenai Formation473 wells · 38% · median 130 ft
  • Madison Group Or Limestone381 wells · 31% · median 380 ft
  • Glacial Great Falls Lake Sediments143 wells · 12% · median 133 ft
  • Alluvium (quaternary)83 wells · 7% · median 23 ft
  • Sand And Gravel (pleistocene)59 wells · 5% · median 186 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 59405

Petroleum releases

124

34 open · 90 resolved

Superfund program sites

2

none on the National Priorities List

Registered tank facilities

104

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 2024. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.