Can landscaping over a drainfield affect its function?

Landscaping over a drainfield can indeed affect its function, primarily because it can impede drainage and aeration. The proper functioning of a septic system relies heavily on the drainfield being able to absorb and treat wastewater effectively. Any landscaping that introduces heavy materials, compaction of soil, or deep-rooted plants can hinder water movement through the soil, reducing the system's ability to process effluent.

In addition, certain plant types might outcompete for moisture and nutrients or even damage the drainfield through root intrusion, which can lead to blockages. Therefore, the choice to landscape over a drainfield must be carefully considered, keeping in mind that while some light landscaping might be acceptable, it needs to be chosen wisely to avoid harming the system’s performance.