What construction material is commonly used for well casings?

The construction material commonly used for well casings primarily includes steel and PVC (polyvinyl chloride). Steel is favored for its strength and durability, providing robust structural support capable of withstanding the pressures found in deep wells and various subsurface conditions. It also offers resistance to corrosion when appropriately treated or coated.

PVC, on the other hand, is lightweight and resistant to many chemicals, making it an excellent choice for shallow wells and situations where rust or corrosion might be a concern. Its ease of installation and the ability to seal effectively against groundwater are also factors that contribute to its common use in well casings.

This combination enables well casings to effectively protect the well from surface contaminants and maintain the structural integrity of the borehole over time. Other materials listed, such as concrete and fiberglass or alternatives like copper, iron, aluminum, and various plastics, do not align as closely with conventional practices in well construction, especially concerning groundwater safety and durability under varied environmental conditions.