What is a critical characteristic of soil that affects the decision on septic system feasibility?

The type of soil is a critical characteristic that plays a significant role in determining the feasibility of a septic system. Different soil types, such as sandy, clay, loamy, or gravelly soils, have varying permeability and absorption capabilities. This property affects how well the soil can filter and absorb effluent from the septic system.

For instance, sandy soils generally allow for quicker drainage and are often suitable for septic systems because they can effectively handle the effluent without becoming saturated. Conversely, clay soils have very low permeability, which can lead to poor drainage and potential system failure if effluent cannot be properly absorbed and filtered. Thus, assessing the soil type helps in designing an effective septic system that adheres to local regulations and environmental health standards.

While color can indicate certain characteristics of soil, such as drainage, it is not a definitive factor in septic system design. Size and moisture content also play roles in system effectiveness but are secondary to the fundamental properties determined by soil type. Understanding the specific types of soil present on a property allows for better planning and implementation of septic systems, ensuring that they function properly and safely over time.