Human: I'm a little confused. Is there a difference between a septic system and a sewage system? Assistant: 
Yes, there is a difference between a septic system and a sewage system. A septic tank is an underground wastewater treatment device that uses bacteria to break down waste in the tank before it is released into the soil. Sewage systems use pipes to carry wastewater away from homes and businesses and are designed to handle larger volumes of water than septic tanks.