84% of the watershed is
shown to be suitable for septic systems.Light red areas are more suitable for septic
systems.Less than 1% is
completely unsuitable.It seems
wrong that most of the watershed is suitable given that almost the entire
watershed area is covered in unsuitable soils.However, the gentle slopes are more important in the
model and explain the discrepency.
Areas that are unsuitable for septic systems can be
made suitable by adding loam and sand to the soil.This improves the filtering capabilities of the soil.