Where should mound systems NOT be installed?

Mound systems are specifically designed to address situations where traditional septic systems may not be feasible due to certain site limitations. Installing these systems requires careful consideration of soil characteristics and water table levels.

The reason for not installing mound systems in areas with severely limited vertical separation is that these systems rely on a certain distance between the infiltrative surface of the mound and the seasonal high groundwater level or bedrock below. If vertical separation is inadequate, the system can fail due to the surrounding saturated conditions leading to ineffective treatment of wastewater. Insufficient vertical separation heightens the risk of effluent surfacing, contamination of groundwater, and violations of health and safety standards.

In contrast, sites with good drainage and permeable soil conditions can actually benefit from mound systems, as they allow for efficient treatment and movement of effluent. Areas with a high water table can be more complex but can sometimes be addressed using other techniques, though specific guidelines usually discourage mound construction in these situations. Overall, proper site assessment is crucial to ensure compliance with septic system regulations and to safeguard public health.