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Montana water data · Community in Lincoln County

Trego: well depth, groundwater and water rights

What the public record says about water in Trego: 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 632 public records from MBMG GWIC, Montana DNRC, Montana DEQ, EPA UST Finder, US Census (place boundary)

Wells on record

261

4.8 per sq mi

Median well depth

187 ft

half of wells 120–300 ft

Median static water level

68 ft

248 measurements

Median tested yield

25 gpm

256 pump tests

Well depth

How deep are wells in Trego?

Of 258 wells with a recorded total depth, the median is 187 feet. Half were drilled between 120 and 300 feet; one in ten went deeper than 461 feet and one in ten found water shallower than 74 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
3%
50–100 ft
12%
100–200 ft
38%
200–300 ft
20%
300–500 ft
19%
500 ft and deeper
8%

Static water level

68 ft

median depth to water at rest · half between 25 and 136 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 13 and 40 gpm

5% 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 Trego

64 wells have been completed here since 2016, 6 of them in the last twelve months. The newest log on file was completed September 23, 2026. Records run back to 1938.

What the wells are for

  • Domestic247
  • Stockwater8
  • Public Water Supply7
  • Irrigation5
  • Commercial3

How they were drilled

  • Rotary195
  • Forward Rotary17
  • Unknown11
  • Air Rotary11

Drillers filing well logs in Trego

  • Davis Brothers Drilling34 since 2016 · 2026
  • Post Pump & Drilling Llc10 since 2016 · 2023
  • Post Pump And Drilling Llc6 since 2016 · 2021
  • Water Resource Services5 since 2016 · 2025
  • Joe Liss Water Wells, Inc.4 since 2016 · 2017
  • Billmayer Drilling1 since 2016 · 2016
  • Stinger Drilling1 since 2016 · 2022
  • Glazier Drilling32 all-time · 2008

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 Trego

Montana DNRC lists 367 water rights with a point of diversion inside this area: 261 groundwater and 106 surface water, 341 of them active. The median priority date is 1986, and the oldest claim dates to 1897.

Types of right

  • Ground Water Certificate206
  • Statement Of Claim120
  • Provisional Permit31
  • Exempt Notice8
  • Compact2

Purposes

  • Domestic150
  • Stock51
  • Irrigation39
  • Domestic; Lawn And Garden38
  • Domestic; Stock20

DNRC basins

  • 76D367

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 Trego 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.

  • Belt Supergroup78 wells · 49% · median 307 ft
  • Glacial Drift64 wells · 41% · median 159 ft
  • Ravalli Group5 wells · 3% · median 218 ft
  • Siyeh Limestone (of Piegan Group)5 wells · 3% · median 220 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 Trego

Petroleum releases

1

0 open · 1 resolved

Superfund program sites

0

none on the National Priorities List

Registered tank facilities

3

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 1989. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.