What is a Mound Septic System?
Mound Septic Systems are a wastewater absorption trench system which has been constructed using “suitable soil-fill material” which has been placed on top of the natural soil on a building lot. Mound systems are often confused with “raised septic bed systems” but have different design requirements, they are generally smaller in total size, and depend on the fill material for successful wastewater treatment. Raised bed septic systems are constructed in fill over soil which can accept septic effluent below the fill. Mound septic systems are constructed in fill over soil which does not acceptably treat septic effluent below the fill – all of the treatment occurs in the mound.
