Montana WaterReport
Check a property

Montana water data · Zip Code in Custer County

ZIP 59336: well depth, groundwater and water rights

What the public record says about water in ZIP code 59336: 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 2,865 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

656

0.6 per sq mi

Median well depth

220 ft

half of wells 115–600 ft

Median static water level

80 ft

431 measurements

Median tested yield

10 gpm

565 pump tests

Well depth

How deep are wells in ZIP 59336?

Of 601 wells with a recorded total depth, the median is 220 feet. Half were drilled between 115 and 600 feet; one in ten went deeper than 900 feet and one in ten found water shallower than 40 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
13%
50–100 ft
9%
100–200 ft
23%
200–300 ft
12%
300–500 ft
13%
500 ft and deeper
31%

Static water level

80 ft

median depth to water at rest · half between 30 and 153 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 16 gpm

21% of tested wells produced under 5 gallons per minute and 23% 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 59336

65 wells have been completed here since 2016, 3 of them in the last twelve months. The newest log on file was completed June 17, 2026. Records run back to 1905.

What the wells are for

  • Stockwater580
  • Domestic156
  • Unused17
  • Irrigation6
  • Commercial3

How they were drilled

  • Rotary175
  • Unknown87
  • Forward Rotary72
  • Drilled9

Drillers filing well logs in ZIP 59336

  • Askin Drilling45 since 2016 · 2026
  • Higgins Drilling Company15 since 2016 · 2025
  • Pirtz Waterworx Llc3 since 2016 · 2025
  • Sharp Drilling Inc2 since 2016 · 2021
  • Unknown76 all-time · 1963
  • Ronald L Askin Drilling36 all-time · 2004
  • Higgins Drillng Company26 all-time · 2010
  • H & H Drilling4 all-time · 1996

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 59336

Montana DNRC lists 2,206 water rights with a point of diversion inside this area: 936 groundwater and 1,270 surface water, 2,130 of them active. The median priority date is 1950, and the oldest claim dates to 1864.

Types of right

  • Statement Of Claim940
  • Powder River Declaration829
  • Ground Water Certificate305
  • Provisional Permit66
  • Stockwater Permit37

Purposes

  • Stock1,642
  • Irrigation318
  • Wildlife66
  • Domestic; Stock58
  • Domestic46

DNRC basins

  • 42L1,109
  • 42J1,035
  • 42M62

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 59336 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.

  • Fox Hills-hell Creek Aquifer159 wells · 40% · median 700 ft
  • Fort Union Formation83 wells · 21% · median 150 ft
  • Tullock Member (of Ft Union Fm.)59 wells · 15% · median 160 ft
  • Fox Hills Formation Or Sandstone36 wells · 9% · median 900 ft
  • Hell Creek Formation25 wells · 6% · median 480 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 59336

Petroleum releases

1

0 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

2

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 1992. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.