Georgia Septic Installer Practice Test

What type of soil is typically best for septic system absorption fields?

1. Clay soil

2. Sandy soil

3. Rocky soil

4. Loamy soil

The correct answer is: Loamy soil

Loamy soil is considered the best type for septic system absorption fields due to its balanced composition of sand, silt, and clay. This mix allows for good drainage while retaining enough moisture and nutrients, which is crucial for breaking down waste. The texture of loamy soil promotes aeration, helping bacteria to thrive and effectively process the wastewater. This enhances the ability of the soil to filter and absorb effluent properly, reducing the risk of system failure and environmental contamination. In contrast, clay soil tends to retain water and has poor drainage properties, leading to potential backups and reduced absorption efficacy. Sandy soil, while it drains well, may not retain enough moisture for effective biological treatment processes. Rocky soil presents challenges due to its density and limited capacity to hold water, which can hinder the absorption of wastewater. Therefore, loamy soil strikes the ideal balance for septic system performance, making it the most suitable choice for absorption fields.