Septic systems are designed to handle which of the following?

Septic systems are specifically designed to treat and manage human sewage and greywater, which is water generated from domestic activities such as bathing, washing dishes, and laundry. These systems work by utilizing a combination of physical, biological, and chemical processes to break down waste products.

The septic tank allows solids to settle at the bottom while the liquid effluent flows into a drain field, where it is filtered through the soil and further treated by natural processes. The design of septic systems focuses on efficiently handling waste generated from domestic sources, ensuring that contaminants are adequately treated before they can affect groundwater or surface water.

The other options are not suitable for septic systems. Rainwater runoff and stormwater drainage pertain to managing excess water from precipitation, which is not a function of septic systems. Similarly, the treatment of hazardous waste requires specialized facilities and methods that are beyond the capabilities of a standard septic system. This highlights the importance of understanding the specific capabilities and limitations of septic systems in managing household waste.