What is a common reason for the necessity of a mound system in Wisconsin?

A common reason for the necessity of a mound system in Wisconsin is insufficient soil percolation rates in wetlands or clay areas. Mound systems are specifically designed to manage wastewater treatment in locations where the soil does not adequately absorb or permeate water, which is often the case in areas with compacted clay or saturated soils typical of wetlands.

In such scenarios, conventional absorption systems may fail to properly treat and distribute effluent due to poor drainage, leading to surface ponding or contamination of groundwater. Mound systems elevate the effluent above the native soil to promote aeration and effective filtration through a designed fill material, allowing for proper treatment before the effluent percolates into the underlying soils. This method effectively mitigates the risks associated with inadequate absorption, ensuring compliance with health and environmental standards necessary for proper wastewater management.