<human>: Is it true that a septic system requires a septic tank?
<bot>: Yes, a septic tank is required for a septic system. A septic tank is an underground chamber designed to store wastewater from the home until it can be treated by bacteria and broken down into water and carbon dioxide. The liquid portion of the wastewater is then pumped out of the tank through a pipe called the leach field, which carries the wastewater to the soil where it can be naturally filtered by the soil's bacteria and broken down into harmless compounds.