What is the main purpose of installing a septic system?

The main purpose of installing a septic system is to treat and dispose of wastewater generated by a household or establishment. Septic systems are designed to process and break down organic matter present in sewage, allowing for the safe disposal of effluent into the soil. This is a critical function, as proper treatment and disposal minimize the risk of harmful contaminants entering the environment and protect public health.

Depending on the design of the septic system, solids are typically settled at the bottom of the tank and, over time, are broken down by anaerobic bacteria. The liquid effluent is then filtered through the soil in the drain field, where additional treatment occurs. This process not only helps in managing household waste but also plays a vital role in maintaining the health of local ecosystems by preventing pollution of groundwater and surface water resources.

Other options, while related to water treatment and management, do not specifically reflect the function of a septic system. For instance, filtering rainwater is not a purpose of septic systems, as they are focused on handling wastewater rather than stormwater. Similarly, while septic systems can contribute to groundwater purification as a secondary effect, their primary role is the treatment and disposal of wastewater. Lastly, septic systems are independent waste treatment systems and do not discharge waste into a sewer