Water Well Drilling Contractors in Missouri

Geology & Depth

Missouri's Ozark Plateau is underlain by Cambrian and Ordovician dolomite and limestone, creating karst features including springs, caves, and sinkholes that influence groundwater flow. Northern Missouri has glacial drift deposits over Pennsylvanian shale and limestone bedrock.

Most residential wells in Missouri are drilled to 195 feet, with a typical range of 50–500 feet. Water table depth: 50-200 feet in the Ozarks; 30-100 feet in northern Missouri glacial deposits; deeper in the Bootheel alluvial plain.

Permits & Licensing

Missouri requires all well drillers to be registered with the Department of Natural Resources. Drillers must pass a competency exam. Homeowners may drill their own wells but must follow construction standards and register the well.

Permit authority: Missouri Department of Natural Resources, Division of Geology and Land Survey. Expect $50-$150 in permit fees.

Primary Aquifer

Ozark Aquifer (Springfield Plateau and Salem Plateau) / Glacial Drift Aquifers (northern Missouri). About 18% of Missouri households use private wells, concentrated in the Ozarks and rural northern Missouri.

Best drilling months: March through November; Ozark terrain can be challenging to access with heavy drill rigs in wet weather.

Common Water Quality Concerns

Missouri well water commonly contains: iron, hardness, hydrogen sulfide, lead from galena mining areas, bacteria in karst systems, nitrate. A comprehensive water test after drilling (typically $150–$500) will identify which treatments, if any, your well needs.