ZIP 59720: well depth, groundwater and water rights

Well depth

How deep are wells in ZIP 59720?

Of 602 wells with a recorded total depth, the median is 216 feet. Half were drilled between 110 and 320 feet; one in ten went deeper than 500 feet and one in ten found water shallower than 60 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.

Drilling activity

Recent well drilling in ZIP 59720

145 wells have been completed here since 2016, 15 of them in the last twelve months. The newest log on file was completed August 11, 2026. Records run back to 1907.

Water rights

Water rights on file in ZIP 59720

Montana DNRC lists 1,323 water rights with a point of diversion inside this area: 693 groundwater and 630 surface water, 1,210 of them active. The median priority date is 1936, and the oldest claim dates to 1865.

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 59720 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.

• Cenozoic Undifferentiated88 wells · 37% · median 120 ft
• Volcanics (tertiary)40 wells · 17% · median 238 ft
• Sand And Gravel (pleistocene)33 wells · 14% · median 105 ft
• Gneiss And Schist (early Proterozoic Or Archean)22 wells · 9% · median 359 ft
• Sand And Gravel (tertiary)22 wells · 9% · median 260 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 59720

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 1999. A property report screens the sites within a quarter, half and one mile of a specific parcel and links the agency records.