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Montana water data · Zip Code in Flathead County

ZIP 59911: well depth, groundwater and water rights

What the public record says about water in ZIP code 59911: 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 8,066 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder, US Census (ZIP Code Tabulation Area)

Wells on record

3,501

7.1 per sq mi

Median well depth

161 ft

half of wells 104–252 ft

Median static water level

41 ft

3,044 measurements

Median tested yield

30 gpm

3,326 pump tests

Well depth

How deep are wells in ZIP 59911?

Of 3,434 wells with a recorded total depth, the median is 161 feet. Half were drilled between 104 and 252 feet; one in ten went deeper than 357 feet and one in ten found water shallower than 56 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
9%
50–100 ft
14%
100–200 ft
39%
200–300 ft
22%
300–500 ft
13%
500 ft and deeper
3%

Static water level

41 ft

median depth to water at rest · half between 20 and 80 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

30 gpm

median tested yield · half between 16 and 50 gpm

2% of tested wells produced under 5 gallons per minute and 72% 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 59911

535 wells have been completed here since 2016, 36 of them in the last twelve months. The newest log on file was completed September 15, 2026. Records run back to 1900.

What the wells are for

  • Domestic3,120
  • Irrigation236
  • Stockwater113
  • Public Water Supply73
  • Monitoring44

How they were drilled

  • Rotary1,953
  • Forward Rotary481
  • Cable362
  • Air Rotary145

Drillers filing well logs in ZIP 59911

  • Billmayer Drilling128 since 2016 · 2026
  • Allwest Drilling Inc83 since 2016 · 2025
  • Oh Well Drilling And Pump69 since 2016 · 2026
  • Rm Drilling And Well Services49 since 2016 · 2026
  • Glazier Drilling36 since 2016 · 2026
  • Chambers Drilling Company24 since 2016 · 2026
  • Okeefe Drilling Co19 since 2016 · 2025
  • Coldwater Drilling And Pumps19 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 59911

Montana DNRC lists 4,508 water rights with a point of diversion inside this area: 3,351 groundwater and 1,157 surface water, 4,290 of them active. The median priority date is 1986, and the oldest claim dates to 1864.

Types of right

  • Ground Water Certificate2,862
  • Statement Of Claim1,100
  • Provisional Permit409
  • Exempt Notice89
  • Compact19

Purposes

  • Domestic2,036
  • Domestic; Lawn And Garden707
  • Irrigation409
  • Multiple Domestic161
  • Lawn And Garden158

DNRC basins

  • 76K2,296
  • 76LJ2,212

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 59911 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 (pleistocene)660 wells · 32% · median 160 ft
  • Glacial Drift507 wells · 25% · median 118 ft
  • Ravalli Group443 wells · 22% · median 207 ft
  • Alluvium (holocene)149 wells · 7% · median 37 ft
  • Belt Supergroup114 wells · 6% · median 224 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 59911

Petroleum releases

23

3 open · 20 resolved

Superfund program sites

1

none on the National Priorities List

Registered tank facilities

33

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 2022. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.