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Montana water data · Zip Code in Valley County

ZIP 59230: well depth, groundwater and water rights

What the public record says about water in ZIP code 59230: 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 5,061 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

1,258

0.8 per sq mi

Median well depth

68 ft

half of wells 35–125 ft

Median static water level

25 ft

833 measurements

Median tested yield

12 gpm

902 pump tests

Well depth

How deep are wells in ZIP 59230?

Of 1,162 wells with a recorded total depth, the median is 68 feet. Half were drilled between 35 and 125 feet; one in ten went deeper than 240 feet and one in ten found water shallower than 24 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
37%
50–100 ft
27%
100–200 ft
24%
200–300 ft
3%
300–500 ft
4%
500 ft and deeper
5%

Static water level

25 ft

median depth to water at rest · half between 15 and 50 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

12 gpm

median tested yield · half between 8 and 20 gpm

9% of tested wells produced under 5 gallons per minute and 30% 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 59230

81 wells have been completed here since 2016, 2 of them in the last twelve months. The newest log on file was completed July 30, 2026. Records run back to 1898.

What the wells are for

  • Domestic538
  • Stockwater524
  • Monitoring264
  • Public Water Supply43
  • Irrigation30

How they were drilled

  • Rotary252
  • Cable128
  • Churn78
  • Hollowstem Auger61

Drillers filing well logs in ZIP 59230

  • Montana Salinity Control Association30 since 2016 · 2020
  • Hansen Environmental Drilling20 since 2016 · 2026
  • Haz Tech Drilling Inc10 since 2016 · 2018
  • Pirtz Waterworx Llc6 since 2016 · 2021
  • Eaton Drilling Co5 since 2016 · 2017
  • Agri Industries Inc3 since 2016 · 2017
  • Petrie Pump & Drilling2 since 2016 · 2022
  • Hansen Drilling1 since 2016 · 2020

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 59230

Montana DNRC lists 3,634 water rights with a point of diversion inside this area: 1,022 groundwater and 2,612 surface water, 3,341 of them active. The median priority date is 1957, and the oldest claim dates to 1880.

Types of right

  • Statement Of Claim2,679
  • Ground Water Certificate368
  • Stockwater Permit269
  • Provisional Permit226
  • Compact47

Purposes

  • Stock2,150
  • Domestic438
  • Wildlife416
  • Irrigation218
  • Domestic; Stock60

DNRC basins

  • 40O3,048
  • 40E535
  • 40S51

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 59230 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.

  • Alluvium (quaternary)196 wells · 44% · median 84 ft
  • Glacial Drift126 wells · 29% · median 44 ft
  • Judith River Formation (of Montana Group)104 wells · 24% · median 400 ft
  • Flaxville Gravels (pliocene-miocene)6 wells · 1% · median 50 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 59230

Petroleum releases

76

25 open · 51 resolved

Superfund program sites

2

none on the National Priorities List

Registered tank facilities

91

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 2024. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.