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Montana water data · Zip Code in Roosevelt County

ZIP 59218: well depth, groundwater and water rights

What the public record says about water in ZIP code 59218: 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 1,486 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

701

1.8 per sq mi

Median well depth

90 ft

half of wells 33–170 ft

Median static water level

54 ft

361 measurements

Median tested yield

10 gpm

379 pump tests

Well depth

How deep are wells in ZIP 59218?

Of 633 wells with a recorded total depth, the median is 90 feet. Half were drilled between 33 and 170 feet; one in ten went deeper than 286 feet and one in ten found water shallower than 16 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
33%
50–100 ft
19%
100–200 ft
26%
200–300 ft
12%
300–500 ft
5%
500 ft and deeper
3%

Static water level

54 ft

median depth to water at rest · half between 24 and 100 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

10 gpm

median tested yield · half between 5 and 14 gpm

15% of tested wells produced under 5 gallons per minute and 15% 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 59218

36 wells have been completed here since 2016, 1 of them in the last twelve months. The newest log on file was completed November 17, 2025. Records run back to 1906.

What the wells are for

  • Stockwater397
  • Domestic166
  • Monitoring120
  • Unused64
  • Other8

How they were drilled

  • Rotary131
  • Forward Rotary50
  • Cable44
  • Hollowstem Auger26

Drillers filing well logs in ZIP 59218

  • West Central Environmental Consultants7 since 2016 · 2021
  • Agri Industries Inc5 since 2016 · 2020
  • Sharp Drilling Inc5 since 2016 · 2022
  • H & H Drilling5 since 2016 · 2022
  • Hansen Environmental Drilling4 since 2016 · 2019
  • Montana Salinity Control Association1 since 2016 · 2021
  • Sk Geotechnical Co1 since 2016 · 2018
  • Boyce Drilling30 all-time · 2006

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 59218

Montana DNRC lists 740 water rights with a point of diversion inside this area: 296 groundwater and 444 surface water, 631 of them active. The median priority date is 1960, and the oldest claim dates to 1888.

Types of right

  • Statement Of Claim461
  • Ground Water Certificate167
  • Provisional Permit55
  • Reserved Claim26
  • Conservation District Record19

Purposes

  • Stock451
  • Irrigation121
  • Domestic76
  • Water Marketing21
  • Domestic; Stock20

DNRC basins

  • 40S649
  • 40R91

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 59218 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.

  • Fort Union Formation132 wells · 43% · median 140 ft
  • Tongue River Member (of Ft Union Fm.)73 wells · 24% · median 125 ft
  • Alluvium (quaternary)42 wells · 14% · median 44 ft
  • Glacial Outwash (pleistocene)20 wells · 6% · median 75 ft
  • Fox Hills-hell Creek Aquifer13 wells · 4% · median 580 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 59218

Petroleum releases

18

6 open · 12 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

27

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 2015. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.