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Montana water data · Zip Code in Madison County

ZIP 59729: well depth, groundwater and water rights

What the public record says about water in ZIP code 59729: 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 3,940 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

1,621

3.5 per sq mi

Median well depth

160 ft

half of wells 80–272 ft

Median static water level

55 ft

1,500 measurements

Median tested yield

20 gpm

1,500 pump tests

Well depth

How deep are wells in ZIP 59729?

Of 1,585 wells with a recorded total depth, the median is 160 feet. Half were drilled between 80 and 272 feet; one in ten went deeper than 405 feet and one in ten found water shallower than 43 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
11%
50–100 ft
19%
100–200 ft
28%
200–300 ft
20%
300–500 ft
17%
500 ft and deeper
5%

Static water level

55 ft

median depth to water at rest · half between 22 and 108 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 35 gpm

5% of tested wells produced under 5 gallons per minute and 60% 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 59729

433 wells have been completed here since 2016, 41 of them in the last twelve months. The newest log on file was completed August 31, 2026. Records run back to 1870.

What the wells are for

  • Domestic1,367
  • Irrigation132
  • Stockwater100
  • Monitoring52
  • Public Water Supply25

How they were drilled

  • Rotary908
  • Dual Rotary263
  • Cable108
  • Forward Rotary60

Drillers filing well logs in ZIP 59729

  • Graham Drilling Inc231 since 2016 · 2025
  • Potts Drilling Inc48 since 2016 · 2026
  • Red Tiger Drilling45 since 2016 · 2026
  • Old Town Drilling23 since 2016 · 2026
  • Van Dyken Drilling Inc17 since 2016 · 2026
  • Diamond M Drilling Inc15 since 2016 · 2025
  • Okeefe Drilling Co11 since 2016 · 2019
  • Graham Drilling & Pumps9 since 2016 · 2026

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 59729

Montana DNRC lists 2,261 water rights with a point of diversion inside this area: 1,526 groundwater and 735 surface water, 2,110 of them active. The median priority date is 1983, and the oldest claim dates to 1863.

Types of right

  • Ground Water Certificate1,237
  • Statement Of Claim932
  • Provisional Permit46
  • Exempt Notice24
  • Water Reservation12

Purposes

  • Domestic606
  • Stock506
  • Irrigation368
  • Domestic; Lawn And Garden238
  • Lawn And Garden69

DNRC basins

  • 41F2,185
  • 41H70
  • 41C6

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 59729 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.

  • Cenozoic Undifferentiated177 wells · 39% · median 140 ft
  • Gneiss And Schist (early Proterozoic Or Archean)138 wells · 30% · median 300 ft
  • Sand And Gravel (pleistocene)32 wells · 7% · median 114 ft
  • Sand And Gravel (tertiary)21 wells · 5% · median 168 ft
  • Sediments (tertiary)18 wells · 4% · median 150 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 59729

Petroleum releases

32

5 open · 27 resolved

Superfund program sites

1

none on the National Priorities List

Registered tank facilities

25

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 2019. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.