Water Well Drilling Contractors in Iowa

Geology & Depth

Iowa's glacial drift covers most of the state with till, loess, and buried channel sands and gravels that provide productive shallow aquifers. Deeper wells tap the Jordan Sandstone and other Cambrian-Ordovician formations, which produce reliable but sometimes mineralized water.

Most residential wells in Iowa are drilled to 175 feet, with a typical range of 40–500 feet. Water table depth: 30-100 feet in alluvial and glacial deposits; 150-1,000 feet for deep bedrock aquifers.

Permits & Licensing

Iowa requires water well contractors to be certified by Iowa DNR. The state allows homeowner drilling for domestic wells on their own property, provided they follow well construction standards and register the well.

Permit authority: Iowa Department of Natural Resources (DNR); county well permits may be required locally. Expect $25-$100 in permit fees.

Primary Aquifer

Jordan Sandstone Aquifer / Glacial Drift Aquifers / Dakota Aquifer (western Iowa). Approximately 21% of Iowa households use private wells, with the highest rates in farming communities across northern and western Iowa.

Best drilling months: April through November; spring flooding on Iowa's rivers can delay access to bottomland sites.

Common Water Quality Concerns

Iowa well water commonly contains: nitrate, coliform bacteria, hardness, iron, manganese, atrazine and other herbicides. A comprehensive water test after drilling (typically $150–$500) will identify which treatments, if any, your well needs.