Montana WaterReport
Check a property

Montana water data · Zip Code in Sanders County

ZIP 59831: well depth, groundwater and water rights

What the public record says about water in ZIP code 59831: 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 478 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

136

1.3 per sq mi

Median well depth

59 ft

half of wells 35–100 ft

Median static water level

17 ft

87 measurements

Median tested yield

20 gpm

77 pump tests

Well depth

How deep are wells in ZIP 59831?

Of 106 wells with a recorded total depth, the median is 59 feet. Half were drilled between 35 and 100 feet; one in ten went deeper than 284 feet and one in ten found water shallower than 15 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
42%
50–100 ft
30%
100–200 ft
12%
200–300 ft
5%
300–500 ft
6%
500 ft and deeper
5%

Static water level

17 ft

median depth to water at rest · half between 10 and 30 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 12 and 50 gpm

8% of tested wells produced under 5 gallons per minute and 58% 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 59831

20 wells have been completed here since 2016, 1 of them in the last twelve months. The newest log on file was completed February 12, 2026. Records run back to 1883.

What the wells are for

  • Domestic88
  • Monitoring23
  • Stockwater10
  • Irrigation5
  • Public Water Supply3

How they were drilled

  • Rotary51
  • Direct Push13
  • Cable9
  • Churn8

Drillers filing well logs in ZIP 59831

  • Olympus Technical Services12 since 2016 · 2023
  • Ace Drilling1 since 2016 · 2016
  • Allwest Drilling Inc1 since 2016 · 2017
  • Western Water Works Inc21 all-time · 1995
  • Mission6 all-time · 1981
  • Site Services6 all-time · 1993
  • Camp Well Drilling5 all-time · 1991
  • Jeromes Drilling Co3 all-time · 2003

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 59831

Montana DNRC lists 331 water rights with a point of diversion inside this area: 221 groundwater and 110 surface water, 217 of them active. The median priority date is 1923, and the oldest claim dates to 1855.

Types of right

  • Statement Of Claim157
  • Compact59
  • Registration Certificate51
  • Ground Water Certificate29
  • Provisional Permit13

Purposes

  • Stock127
  • Irrigation51
  • Wildlife48
  • Domestic25
  • Domestic; Lawn And Garden12

DNRC basins

  • 76L330
  • 76M1

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 59831 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.

  • Glacial Outwash (pleistocene)40 wells · 59% · median 55 ft
  • Alluvium (holocene)14 wells · 21% · median 32 ft
  • Glacial Lake Missoula Beds5 wells · 7% · median 140 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 59831

Petroleum releases

5

0 open · 5 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

6

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.