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Montana water data · Zip Code in Madison County

ZIP 59740: well depth, groundwater and water rights

What the public record says about water in ZIP code 59740: 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 1,926 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

557

3.6 per sq mi

Median well depth

100 ft

half of wells 58–167 ft

Median static water level

30 ft

511 measurements

Median tested yield

25 gpm

521 pump tests

Well depth

How deep are wells in ZIP 59740?

Of 541 wells with a recorded total depth, the median is 100 feet. Half were drilled between 58 and 167 feet; one in ten went deeper than 280 feet and one in ten found water shallower than 38 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
19%
50–100 ft
30%
100–200 ft
31%
200–300 ft
11%
300–500 ft
6%
500 ft and deeper
2%

Static water level

30 ft

median depth to water at rest · half between 18 and 57 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

25 gpm

median tested yield · half between 16 and 42 gpm

2% of tested wells produced under 5 gallons per minute and 69% 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 59740

114 wells have been completed here since 2016, 9 of them in the last twelve months. The newest log on file was completed August 4, 2026. Records run back to 1886.

What the wells are for

  • Domestic482
  • Stockwater58
  • Irrigation30
  • Monitoring7
  • Other5

How they were drilled

  • Rotary331
  • Dual Rotary57
  • Cable34
  • Forward Rotary19

Drillers filing well logs in ZIP 59740

  • Graham Drilling Inc52 since 2016 · 2025
  • Van Dyken Drilling Inc15 since 2016 · 2026
  • Red Tiger Drilling15 since 2016 · 2025
  • Potts Drilling Inc10 since 2016 · 2025
  • Old Town Drilling5 since 2016 · 2026
  • Diamond M Drilling Inc4 since 2016 · 2020
  • Vidic Drilling3 since 2016 · 2026
  • A-10 Drilling3 since 2016 · 2023

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 59740

Montana DNRC lists 1,366 water rights with a point of diversion inside this area: 544 groundwater and 822 surface water, 1,281 of them active. The median priority date is 1905, and the oldest claim dates to 1858.

Types of right

  • Statement Of Claim922
  • Ground Water Certificate405
  • Provisional Permit16
  • Exempt Notice14
  • Water Reservation6

Purposes

  • Irrigation577
  • Stock297
  • Domestic198
  • Domestic; Lawn And Garden97
  • Domestic; Stock20

DNRC basins

  • 41F1,287
  • 41G79

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 59740 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.

  • Gneiss And Schist (early Proterozoic Or Archean)46 wells · 39% · median 145 ft
  • Cenozoic Undifferentiated45 wells · 38% · median 74 ft
  • Sand And Gravel (pleistocene)14 wells · 12% · median 66 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 59740

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 1998. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.