Georgia Septic Installer Practice Test

Slopes greater than what percentage are generally unsuitable for absorption fields?

1. 15%

2. 20%

3. 25%

4. 30%

The correct answer is: 25%

Slopes greater than 25% are generally considered unsuitable for absorption fields because steep slopes can significantly affect the performance of septic systems. When the slope is too steep, the movement of wastewater can be rapid, leading to inadequate absorption and treatment of effluent. The risk of runoff also increases, which can lead to potential contamination of surface water and groundwater. Additionally, steeply sloped land can create challenges for maintenance and require additional engineering considerations to ensure proper functioning of the absorption field. In general, for absorption fields to be effective, they need to have a consistent and controlled flow of wastewater, ensuring that it has enough time to be treated by the soil. Excessive slopes disrupt this balance, making it difficult for the soil to absorb and treat the wastewater properly. Therefore, maintaining a slope of 25% or less is essential for the effective operation of septic systems.