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Montana water data · County

Park County: well depth, groundwater and water rights

What the public record says about water in Park County: 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 19,485 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA SEMS, EPA UST Finder

Wells on record

6,902

6,330 with recorded depth

Median well depth

110 ft

half of wells 56–205 ft

Median static water level

38 ft

5,812 measurements

Median tested yield

25 gpm

5,749 pump tests

Well depth

How deep are wells in Park County?

Of 6,330 wells with a recorded total depth, the median is 110 feet. Half were drilled between 56 and 205 feet; one in ten went deeper than 303 feet and one in ten found water shallower than 35 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
21%
50–100 ft
24%
100–200 ft
27%
200–300 ft
17%
300–500 ft
9%
500 ft and deeper
2%

Static water level

38 ft

median depth to water at rest · half between 18 and 78 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 14 and 45 gpm

6% of tested wells produced under 5 gallons per minute and 65% 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 Park County

923 wells have been completed here since 2016, 54 of them in the last twelve months. The newest log on file was completed August 18, 2026. Records run back to 1880.

What the wells are for

  • Domestic5,214
  • Monitoring582
  • Stockwater568
  • Irrigation414
  • Public Water Supply156

How they were drilled

  • Rotary4,195
  • Cable591
  • Forward Rotary343
  • Sonic120

Drillers filing well logs in Park County

  • Hayes Drilling464 since 2016 · 2026
  • Red Tiger Drilling152 since 2016 · 2026
  • Potts Drilling Inc96 since 2016 · 2026
  • Van Dyken Drilling Inc46 since 2016 · 2026
  • Okeefe Drilling Co28 since 2016 · 2025
  • Old Town Drilling20 since 2016 · 2026
  • Bridger Drilling Inc19 since 2016 · 2022
  • Diamond M Drilling Inc19 since 2016 · 2025

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 Park County

Montana DNRC lists 12,340 water rights in the county: 6,730 groundwater and 5,610 surface water, 11,012 of them active. The median priority date is 1950, and the oldest claim dates to 1855.

Types of right

  • Statement Of Claim7,302
  • Ground Water Certificate4,049
  • Provisional Permit487
  • Exempt Notice169
  • Converted Terminates148

Purposes

  • Stock3,864
  • Irrigation2,721
  • Domestic2,510
  • Domestic; Lawn And Garden648
  • Domestic; Stock306

DNRC basins

  • 43B7,608
  • 43A4,193
  • 43BJ380
  • 43D75
  • 41H35

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 Park County 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.

  • Glacial Drift976 wells · 22% · median 141 ft
  • Fort Union Formation864 wells · 19% · median 120 ft
  • Alluvium (quaternary)623 wells · 14% · median 74 ft
  • Alluvium (holocene)529 wells · 12% · median 42 ft
  • Absaroka Volcanics (eocene)319 wells · 7% · median 280 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 Park County

Petroleum releases

90

7 open · 83 resolved

Superfund program sites

4

none on the National Priorities List

Registered tank facilities

149

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 2026. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.