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Montana water data · Zip Code in Jefferson County

ZIP 59631: well depth, groundwater and water rights

What the public record says about water in ZIP code 59631: 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 483 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

108

0.7 per sq mi

Median well depth

110 ft

half of wells 55–230 ft

Median static water level

28 ft

88 measurements

Median tested yield

20 gpm

92 pump tests

Well depth

How deep are wells in ZIP 59631?

Of 99 wells with a recorded total depth, the median is 110 feet. Half were drilled between 55 and 230 feet; one in ten went deeper than 336 feet and one in ten found water shallower than 30 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
20%
50–100 ft
24%
100–200 ft
26%
200–300 ft
11%
300–500 ft
16%
500 ft and deeper
2%

Static water level

28 ft

median depth to water at rest · half between 16 and 44 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

20 gpm

median tested yield · half between 10 and 30 gpm

11% of tested wells produced under 5 gallons per minute and 57% 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 59631

20 wells have been completed here since 2016, 4 of them in the last twelve months. The newest log on file was completed July 29, 2026. Records run back to 1940.

What the wells are for

  • Domestic73
  • Public Water Supply16
  • Monitoring9
  • Geotech2
  • Stockwater2

How they were drilled

  • Rotary48
  • Air Rotary15
  • Dual Rotary8
  • Cable7

Drillers filing well logs in ZIP 59631

  • Okeefe Drilling Co8 since 2016 · 2025
  • A-10 Drilling4 since 2016 · 2023
  • Ak Drilling Inc.4 since 2016 · 2025
  • Lindsay Drilling Co Inc1 since 2016 · 2018
  • H & L Drilling Inc12 all-time · 1999
  • Unknown6 all-time · 1957
  • H And L Drilling5 all-time · 2011
  • Ak Drilling Inc4 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 59631

Montana DNRC lists 367 water rights with a point of diversion inside this area: 132 groundwater and 235 surface water, 331 of them active. The median priority date is 1906, and the oldest claim dates to 1858.

Types of right

  • Statement Of Claim298
  • Ground Water Certificate54
  • Provisional Permit11
  • Exempt Notice2
  • Water Reservation1

Purposes

  • Stock195
  • Irrigation47
  • Domestic46
  • Mining29
  • Domestic; Lawn And Garden9

DNRC basins

  • 41E365
  • 76G2

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.

Environmental groundwater screening

Documented environmental sites in ZIP 59631

Petroleum releases

4

0 open · 4 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

4

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 2009. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.