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Montana water data · Zip Code in Jefferson County

ZIP 59638: well depth, groundwater and water rights

What the public record says about water in ZIP code 59638: 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 1,007 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

493

8.2 per sq mi

Median well depth

220 ft

half of wells 140–324 ft

Median static water level

41 ft

446 measurements

Median tested yield

20 gpm

422 pump tests

Well depth

How deep are wells in ZIP 59638?

Of 451 wells with a recorded total depth, the median is 220 feet. Half were drilled between 140 and 324 feet; one in ten went deeper than 440 feet and one in ten found water shallower than 80 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
6%
50–100 ft
7%
100–200 ft
27%
200–300 ft
26%
300–500 ft
24%
500 ft and deeper
8%

Static water level

41 ft

median depth to water at rest · half between 25 and 72 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

7% of tested wells produced under 5 gallons per minute and 53% 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 59638

125 wells have been completed here since 2016, 1 of them in the last twelve months. The newest log on file was completed October 4, 2025. Records run back to 1890.

What the wells are for

  • Domestic420
  • Monitoring46
  • Stockwater13
  • Unused11
  • Irrigation5

How they were drilled

  • Rotary334
  • Air Rotary80
  • Cable10
  • Churn6

Drillers filing well logs in ZIP 59638

  • H & L Drilling Inc63 since 2016 · 2024
  • A-10 Drilling37 since 2016 · 2025
  • Lindsay Drilling Co Inc10 since 2016 · 2024
  • Aaaa Water Well Drilling Inc8 since 2016 · 2023
  • Western Water Wells4 since 2016 · 2025
  • Lindsay Drilling Co2 since 2016 · 2025
  • Treasure State Drilling32 all-time · 2008
  • Lindsay Drilling23 all-time · 2012

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 59638

Montana DNRC lists 512 water rights with a point of diversion inside this area: 350 groundwater and 162 surface water, 460 of them active. The median priority date is 1991, and the oldest claim dates to 1858.

Types of right

  • Ground Water Certificate304
  • Statement Of Claim177
  • Reserved Claim13
  • Provisional Permit12
  • Exempt Notice4

Purposes

  • Domestic169
  • Stock88
  • Domestic; Lawn And Garden76
  • Mining33
  • Irrigation22

DNRC basins

  • 41I508
  • 41E4

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 59638 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.

  • Boulder Batholith10 wells · 43% · median 203 ft
  • Alluvium (quaternary)5 wells · 22% · median 53 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 59638

Petroleum releases

1

0 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

1

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 1993. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.