Montana county well data

Lewis And Clark County well depths

We analyzed 4 well records with recorded depths in Lewis And Clark County from the Montana Ground Water Information Center. The median well is 140 feet deep, and most fall between 88.9 and 197.5 feet.

4
Well records analyzed
4
With recorded depth
140 ft
Median depth
88.9–197.5 ft
Typical range (25th–75th)
68.9–229 ft
10th–90th percentile
55.5 ft
Shallowest recorded
250 ft
Deepest recorded
33.5 GPM
Median reported yield

What these numbers mean if you are buying here

A county median is a useful orientation, not a prediction for a specific property. Well depth in Montana is driven by local geology and topographic position, and both change over short distances — particularly at the edges of the intermontane basins, where unconsolidated basin fill gives way to bedrock. Two parcels a mile apart in Lewis And Clark County can require very different wells.

The spread here shows that directly. While the median is 140 feet, recorded depths run from 55.5 to 250 feet. That range is why our property reports select comparable wells around the specific parcel and weight them by geology rather than quoting a county average.

The median reported yield in Lewis And Clark County is 33.5 GPM. Bear in mind these are short drilling-test measurements taken at completion, not sustained-capacity tests, so treat them as an indication of what drillers encountered rather than a guarantee of long-term supply.

Static water level — the depth at which water stands before pumping — has a median of 40 feet across 4 records in the county. This affects pump setting and operating cost.

Check a specific property

County statistics are context. A property report analyzes the wells around one parcel.

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Source: Montana Bureau of Mines and Geology, Ground Water Information Center (GWIC) and Montana Department of Natural Resources and Conservation (DNRC), Water Rights Bureau. Statistics computed August 13, 2026. Abandoned, plugged, and destroyed wells are excluded, as are depths outside a plausible range. See methodology.