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Montana water data · Zip Code in Powell County

ZIP 59731: well depth, groundwater and water rights

What the public record says about water in ZIP code 59731: 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 687 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

254

1.9 per sq mi

Median well depth

123 ft

half of wells 55–220 ft

Median static water level

35 ft

194 measurements

Median tested yield

18 gpm

214 pump tests

Well depth

How deep are wells in ZIP 59731?

Of 227 wells with a recorded total depth, the median is 123 feet. Half were drilled between 55 and 220 feet; one in ten went deeper than 335 feet and one in ten found water shallower than 36 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
21%
50–100 ft
18%
100–200 ft
29%
200–300 ft
17%
300–500 ft
11%
500 ft and deeper
5%

Static water level

35 ft

median depth to water at rest · half between 14 and 79 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

18 gpm

median tested yield · half between 10 and 30 gpm

8% of tested wells produced under 5 gallons per minute and 49% 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 59731

44 wells have been completed here since 2016, 3 of them in the last twelve months. The newest log on file was completed August 1, 2026. Records run back to 1919.

What the wells are for

  • Domestic187
  • Stockwater22
  • Monitoring18
  • Industrial11
  • Other10

How they were drilled

  • Rotary112
  • Cable34
  • Forward Rotary15
  • Foward Rotary11

Drillers filing well logs in ZIP 59731

  • Western Water Wells14 since 2016 · 2025
  • Okeefe Drilling Co13 since 2016 · 2024
  • A-10 Drilling3 since 2016 · 2024
  • Ak Drilling Inc3 since 2016 · 2025
  • H & L Drilling Inc2 since 2016 · 2021
  • Red Tiger Drilling2 since 2016 · 2020
  • Jeromes Drilling Co1 since 2016 · 2021
  • Brazill Drilling17 all-time · 1997

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 59731

Montana DNRC lists 427 water rights with a point of diversion inside this area: 202 groundwater and 225 surface water, 412 of them active. The median priority date is 1925, and the oldest claim dates to 1855.

Types of right

  • Statement Of Claim290
  • Ground Water Certificate124
  • Exempt Notice9
  • Provisional Permit4

Purposes

  • Stock205
  • Domestic70
  • Irrigation69
  • Domestic; Lawn And Garden12
  • Mining11

DNRC basins

  • 76G425
  • 76F2

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 59731 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.

  • Carter Creek Formation (of Colorado Group)36 wells · 27% · median 120 ft
  • Sand And Gravel (holocene)21 wells · 16% · median 37 ft
  • Colorado Shale Or Fm. (of Colorado Group)13 wells · 10% · median 140 ft
  • Golden Spike Fm (of Montana Group)13 wells · 10% · median 93 ft
  • Alluvium (holocene)9 wells · 7% · median 35 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 59731

Petroleum releases

1

0 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

5

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 1999. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.