Well Drillers Near Tomah, Wisconsin

A geological estimate for the Tomah area.

Detailed Summary

Based on synthesis from multiple well logs in Tomah and surrounding Monroe County, the region's geology is generally characterized by a surficial layer of sand (occasionally sand/clay or sandy clay) ranging from approximately 10–20 feet thick. This is underlain by soft, caving, or layered sandstone, often with silt or clay transitions, extending to about 60–90 feet. Below this depth, wells typically penetrate into firmer, harder, or lighter-colored (often white/tan) sandstone, which serves as the main aquifer. Shale may be present at greater depths in some locations but is not uniformly encountered. Wells constructed for residential use commonly reach total drilled depths of 60–120 feet, with static water levels averaging 10–50 feet below ground and sustainable yields in the 10–15+ GPM range. High-capacity municipal or commercial wells may be drilled deeper, up to 140 feet or more, targeting the lower sandstone aquifer.

Expected Geological Layers