What characteristics define acceptable soil for a drain field?

The characteristic that defines acceptable soil for a drain field is having adequate drainage and permeability while avoiding excessive clay content. This is essential because a drain field, or leach field, relies on the soil to filter and purify the effluent from a septic system.

Soil with adequate drainage allows treated waste to flow through it effectively, preventing surface pooling or backing up in the system. Permeability is equally important, as it dictates how well the water can move through the soil layers. If the soil has too much clay, it can lead to poor drainage, causing water to pond and potentially leading to system failure or groundwater contamination.

In summary, the combination of proper drainage and an appropriate balance of soil types—avoiding excessively clay-rich content—is vital for the functionality of a drain field, ensuring that effluent is appropriately treated before it enters the groundwater.