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Montana water data · Zip Code in Yellowstone County

ZIP 59102: well depth, groundwater and water rights

What the public record says about water in ZIP code 59102: 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 2,972 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

1,520

101.1 per sq mi

Median well depth

28 ft

half of wells 23–38 ft

Median static water level

13 ft

1,296 measurements

Median tested yield

30 gpm

1,155 pump tests

Well depth

How deep are wells in ZIP 59102?

Of 1,403 wells with a recorded total depth, the median is 28 feet. Half were drilled between 23 and 38 feet; one in ten went deeper than 63 feet and one in ten found water shallower than 20 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
83%
50–100 ft
13%
100–200 ft
4%
200–300 ft
0%
300–500 ft
0%
500 ft and deeper
0%

Static water level

13 ft

median depth to water at rest · half between 10 and 17 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 20 and 40 gpm

2% of tested wells produced under 5 gallons per minute and 86% 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 59102

159 wells have been completed here since 2016, 10 of them in the last twelve months. The newest log on file was completed September 3, 2026. Records run back to 1900.

What the wells are for

  • Domestic750
  • Irrigation452
  • Monitoring219
  • Stockwater27
  • Test Well14

How they were drilled

  • Rotary409
  • Forward Rotary297
  • Hollowstem Auger113
  • Driven106

Drillers filing well logs in ZIP 59102

  • American Drilling & Supply63 since 2016 · 2025
  • Haz Tech Drilling Inc28 since 2016 · 2026
  • Bertram Drilling Inc19 since 2016 · 2025
  • Sk Geotechnical Co17 since 2016 · 2022
  • Aaqua Drilling Inc10 since 2016 · 2026
  • Pioneer Technical Services Inc6 since 2016 · 2022
  • Olympus Technical Services6 since 2016 · 2024
  • Mayes Drilling Inc4 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 59102

Montana DNRC lists 1,278 water rights with a point of diversion inside this area: 1,249 groundwater and 29 surface water, 1,219 of them active. The median priority date is 1982, and the oldest claim dates to 1890.

Types of right

  • Ground Water Certificate1,158
  • Statement Of Claim76
  • Provisional Permit36
  • Exempt Notice8

Purposes

  • Domestic678
  • Lawn And Garden468
  • Irrigation39
  • Domestic; Lawn And Garden26
  • Commercial10

DNRC basins

  • 43Q1,278

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 59102 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.

  • Terrace Deposits (holocene)664 wells · 57% · median 26 ft
  • Alluvium (holocene)307 wells · 27% · median 29 ft
  • Terrace Deposits (pleistocene)137 wells · 12% · median 32 ft
  • Yellowstone River Terrace-317 wells · 1% · median 30 ft
  • Alluvium (pleistocene)10 wells · 1% · median 36 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 59102

Petroleum releases

75

21 open · 54 resolved

Superfund program sites

1

none on the National Priorities List

Registered tank facilities

98

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 2023. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.