Why is it advised to avoid driving over a septic drainfield?

Avoiding driving over a septic drainfield is advised primarily because it can compact the soil and damage the system. The drainfield is designed to facilitate the absorption and treatment of wastewater through the soil. When heavy vehicles or equipment drive over this area, the soil can become compacted, which reduces its ability to absorb water and facilitates proper drainage. This compaction can lead to system failures, where wastewater cannot adequately percolate through the soil layers, potentially causing backups and other operational issues for the septic system. Therefore, protecting the integrity of the soil structure in the drainfield is crucial in maintaining the effectiveness and functionality of the septic system.