Which soil absorption rate is acceptable for a conventional subsurface sewage disposal system?

The acceptable soil absorption rate for a conventional subsurface sewage disposal system is indeed between ten and seventy-five minutes per inch. This range indicates that the soil has a good capacity to absorb water, which is crucial for the effective functioning of a septic system.

Soils that absorb effluent too quickly (in less than ten minutes per inch) may not adequately treat the wastewater before it enters the groundwater, leading to contamination. Conversely, soils that absorb effluent too slowly (greater than seventy-five minutes per inch) can cause the system to fail, leading to surface ponding and potential health hazards.

Therefore, the specified range ensures that the soil can both effectively treat the effluent and manage water flow, contributing to the longevity and efficacy of the septic system. It strikes a balance that promotes proper wastewater treatment while preventing system overload.