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Montana water data · Zip Code in Cascade County

ZIP 59404: well depth, groundwater and water rights

What the public record says about water in ZIP code 59404: 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 3,500 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

1,719

5.2 per sq mi

Median well depth

155 ft

half of wells 70–355 ft

Median static water level

48 ft

1,326 measurements

Median tested yield

30 gpm

1,286 pump tests

Well depth

How deep are wells in ZIP 59404?

Of 1,594 wells with a recorded total depth, the median is 155 feet. Half were drilled between 70 and 355 feet; one in ten went deeper than 520 feet and one in ten found water shallower than 23 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
16%
50–100 ft
17%
100–200 ft
27%
200–300 ft
9%
300–500 ft
20%
500 ft and deeper
11%

Static water level

48 ft

median depth to water at rest · half between 20 and 119 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 17 and 50 gpm

5% of tested wells produced under 5 gallons per minute and 74% 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 59404

291 wells have been completed here since 2016, 33 of them in the last twelve months. The newest log on file was completed September 17, 2026. Records run back to 1900.

What the wells are for

  • Domestic1,142
  • Monitoring315
  • Stockwater158
  • Irrigation107
  • Public Water Supply53

How they were drilled

  • Rotary779
  • Cable214
  • Forward Rotary57
  • Churn56

Drillers filing well logs in ZIP 59404

  • Boland Drilling78 since 2016 · 2026
  • Aquasource Drilling Llc67 since 2016 · 2026
  • Aaaa Water Well Drilling Inc54 since 2016 · 2026
  • Pat Byrne Drilling Inc28 since 2016 · 2026
  • Cascade Drilling Lp19 since 2016 · 2021
  • Aquasource Inc Llc16 since 2016 · 2023
  • Montana Salinity Control Association12 since 2016 · 2026
  • 406 Water Wells, Llc10 since 2016 · 2026

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 59404

Montana DNRC lists 1,598 water rights with a point of diversion inside this area: 1,107 groundwater and 491 surface water, 1,449 of them active. The median priority date is 1979, and the oldest claim dates to 1880.

Types of right

  • Ground Water Certificate862
  • Statement Of Claim557
  • Provisional Permit119
  • Exempt Notice42
  • Compact11

Purposes

  • Domestic426
  • Stock228
  • Irrigation223
  • Domestic; Lawn And Garden217
  • Lawn And Garden81

DNRC basins

  • 41QJ721
  • 41K641
  • 41Q152
  • 41O84

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 59404 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.

  • Madison Group Or Limestone394 wells · 31% · median 405 ft
  • Kootenai Formation275 wells · 22% · median 162 ft
  • Glacial Great Falls Lake Sediments180 wells · 14% · median 138 ft
  • Colorado Shale Or Fm. (of Colorado Group)102 wells · 8% · median 70 ft
  • Sand And Gravel (pleistocene)100 wells · 8% · median 142 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 59404

Petroleum releases

100

15 open · 85 resolved

Superfund program sites

2

none on the National Priorities List

Registered tank facilities

81

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.