Some soil types are unsuitable for conventional septic systems.
However, alternative systems such as the mound system can overcome soil and site conditions which might prevent the use of basic septic systems. A mound system consists of a septic tank, dosing chamber, and elevated absorption mound. The dosing chamber is an additional tank that receives effluent from the septic tank. The effluent is held in this chamber and then periodically pumped into the absorption mound. Because the soil in the mound receives the effluent evenly and over set intervals, it is much less likely to become overly wet than a traditional system.