What type of soils are deemed suitable in the context of septic systems due to their texture?

Sandy texture soils are considered suitable for septic systems due to their ability to provide good drainage and aeration. The larger particles in sandy soils create spaces that allow water to flow through easily, reducing the risk of puddling and ensuring that effluent can percolate into the ground effectively. This permeability is crucial for the proper functioning of a septic system, as it allows for efficient decomposition of waste and minimizes the likelihood of system failure.

In contrast, heavy clay soils tend to retain water due to their fine particles and compact nature, which can lead to over-saturation and hinder the absorption of effluent. Rocky soils may present challenges for excavation and installation of septic systems, and their structure might not support adequate effluent dispersal. Silty soils, while they have some good qualities, can retain too much moisture, leading to potential drainage issues similar to clay. Thus, sandy texture soils stand out as the best option for septic systems in terms of texture suitability.