How deep must a septic tank generally be buried?

In North Carolina, septic tanks are typically required to be buried at a depth of 18 to 24 inches. This depth is essential for several reasons. Firstly, it ensures that the tank is protected and insulated from temperature fluctuations, which can impact the bacterial activity crucial for breaking down waste inside the tank. Additionally, this depth is sufficient to prevent surface disturbances and ensure that the tank remains accessible for maintenance, such as pumping or inspection, while still adhering to safety standards that prevent accidental damage or exposure.

Burial deeper than this range may complicate access for regular maintenance and could potentially lead to issues with structural integrity or groundwater contamination if not properly engineered. Therefore, the specified depth range strikes a balance between effective operation, safety, and maintenance convenience.