What environmental factors should be considered when installing a septic system?

When installing a septic system, it is crucial to consider environmental factors that directly impact the system's functionality and the surrounding ecosystem. Flood zones and proximity to water bodies are particularly important because these factors can greatly influence the risk of contamination and system failure.

If a septic system is installed in a flood-prone area, there is a significant risk that floodwaters could overwhelm the system, leading to sewage backing up into homes or contaminating local water sources. Additionally, proximity to water bodies, such as rivers, lakes, and streams, must be carefully evaluated to prevent effluent from entering these bodies of water, which could harm aquatic life and violate environmental regulations.

By focusing on these environmental factors, installers can ensure that the septic system is sited properly to maintain public health and protect local water resources. The other choices, while relevant in specific contexts, do not address the critical environmental aspects that can lead to system malfunction and environmental hazards.