Water Well Drilling Contractors in Arizona

Geology & Depth

Arizona's Basin and Range geology consists of deep alluvial basins filled with sand, gravel, and clay between mountain ranges of igneous and metamorphic rock. The Colorado Plateau in the north features layered sandstone and limestone formations with deeper water tables.

Most residential wells in Arizona are drilled to 342 feet, with a typical range of 100–1000 feet. Water table depth: 100-600 feet in the Phoenix and Tucson basins; can exceed 1,000 feet in some desert areas.

Permits & Licensing

All well drillers must hold an Arizona Registrar of Contractors license. The state does not allow homeowner self-drilling. Wells in Active Management Areas face additional restrictions on new exempt well drilling.

Permit authority: Arizona Department of Water Resources (ADWR); wells in Active Management Areas require a drilling permit and well registration. Expect $150-$500 in permit fees.

Primary Aquifer

Central Arizona Basin / Basin and Range Alluvial Aquifers. Roughly 12% of Arizona households use private wells, mostly in rural areas outside Phoenix and Tucson metro Active Management Areas.

Best drilling months: October through April; summer monsoon season brings flash flood risks and extreme heat slows drilling operations.

Common Water Quality Concerns

Arizona well water commonly contains: arsenic, fluoride, total dissolved solids, nitrate, uranium, hardness. A comprehensive water test after drilling (typically $150–$500) will identify which treatments, if any, your well needs.