Septic Mound Systems in Wisconsin

A mound is a septic system that raises the drain field above the natural ground in a bed of sand, for sites where the soil is too shallow, too wet or too slow for a conventional in-ground system. Mounds were the most common replacement system funded through the state's grant program in its 2024 to 2025 report.

The companies on this page say they install, repair or service mound systems. A new mound needs a soil evaluation by a certified soil tester and a sanitary permit, usually from the county. Ask how many mounds they have built in your county, who does the soil test, and what upkeep the pump and the mound need each year.