human
Can you explain the differences between a septic tank and a sewage system?
assistant
A septic tank is a water treatment system used in rural areas that uses bacteria to break down waste. It is usually made of concrete, fiberglass or plastic and can be either buried underground or placed on the surface. Sewage systems are designed for larger communities and typically use a series of pipes and pumps to move wastewater from homes to treatment plants where it is treated before being released into rivers, lakes, or oceans.