If the water table in the surrounding soils becomes too high, the effluent will go straight into the water table without being adequately treated first.
If the partnering septic tank fails, raw effluent can start to flow into the soakaway, which could result in failure of the whole system.
If the soakaway has been installed in an area of clay based soil, then the water will not be able to pass out of the system and into the soil.
Surrounding trees and shrubs can cause septic tank soakaway problems, as this can lead to root ingress which can damage the system’s structure and cause a blocked soakaway.
The effectiveness of a soakaway’s structure can be reduced if a vehicle or heavy machinery moves over the system. This is because the surrounding soil can get compacted which will reduce its permeability.