What is the Subsurface Wastewater Infiltration Area also known as?

The Subsurface Wastewater Infiltration Area is commonly known as the "drain field." This terminology reflects its function within onsite wastewater systems where treated effluent is distributed into the ground for further purification through soil filtration and microbial action. The drain field allows wastewater to percolate into the soil, helping to remove contaminants and providing a crucial step in the treatment process before the water re-enters the groundwater system.

Other terms like "discharge zone," "collection tank," and "effluent treatment area" refer to different components or processes in wastewater management. While they relate to the overall system, they do not specifically denote the area where effluent is absorbed by the soil. In this context, the correct term for the area designated for infiltration and absorption of treated wastewater is indeed the drain field.