Which is a consequence of compacted soil in a drain field?

Compacted soil in a drain field leads to an increased risk of system failure primarily because the compaction reduces the soil's ability to absorb and filter wastewater effectively. When soil becomes compacted, there is less pore space available for the movement of water and air, which are both essential for the treatment of wastewater. This limits the soil’s natural filtration capabilities and can lead to the pooling of wastewater on the surface, creating conditions that may result in an overburdened system.

In addition, compacted soil can contribute to the buildup of harmful bacteria and pathogens, as the wastewater does not properly disperse or undergo adequate treatment. If the absorption capacity is diminished, the drain field may quickly become saturated, eventually causing the entire septic system to fail and necessitating costly repairs or replacements.

In contrast, improved filtration and absorption would actually be a benefit of well-structured, uncompact soil, while decreased odor and speedier treatment are also linked to effective absorption. Compacted soil hampers these functions significantly, thereby validating the assertion that it increases system failure risk.